DIPTERA FROM NEPAL EMPIDIDAE BY KENNETH G. V. SMITH British Museum (Natural History) Pp. 61-112 ; 66 Text- figures BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY) ENTOMOLOGY Vol. 17 No. 2 LONDON: 1965 THE BULLETIN OF THE BRITISH MUSEUM (NATURAL HISTORY), instituted in 1949, is issued in five series corresponding to the Departments of the Museum, and an Historical series. Parts will appear at irregular intervals as they become ready. Volumes will contain about three or four hundred pages, and will not necessarily be completed within one calendar year. In 1965 a separate supplementary series of longer papers was instituted, numbered serially for each Department. This paper is Vol. 17, No. 2 of the Entomological series. The abbreviated titles of periodicals cited follow those of the World List of Scientific Periodicals. Trustees of the British Museum (Natural History) 1965 TRUSTEES OF THE BRITISH MUSEUM (NATURAL HISTORY) Issued 23 September, 1965 Price i DIPTERA FROM NEPAL EMPIDIDAE By KENNETH G. V. SMITH CONTENTS Page INTRODUCTION ........... 63 Subfamily Tachydromiinae ......... 65 Subfamily Hybotinae . . . . . . . . .81 Subfamily Ocydromiinae ......... 85 Subfamily Empidinae ......... 85 Subfamily Hemerodromiinae ........ 90 Subfamily Clinocerinae ......... 98 REFERENCES ........... 109 INDEX . . . . . . . . . . . .in SYNOPSIS The Empididae collected on the 1954 an d 1961-62 British Museum Expeditions to Nepal are systematically treated. Thirty-eight new species, i new subspecies, representing 18 genera are described and their relationships discussed. A lectotype is designated for Hemerodromia xiphias Bezzi. INTRODUCTION THIS paper is based mainly on material collected by Mr. R. L. Coe, entomologist on the 1961-62 British Museum (Natural History) Expedition to Eastern Nepal. Cold winds necessitated collecting in sheltered river valleys, which accounts for the bias towards groups with aquatic immature stages, e.g. Hemerodromiinae, Clino- cerinae and Hilara. The Empidinae, such a prominent feature of the Palaearctic fauna were poorly represented, but members of this subfamily normally appear later in the year when more flowers are out. Most of Brunetti's (1913, 1920) Empidinae from the Indian Himalayas were captured during May-June. Mr. Coe's interesting collection suggests faunistic links with the Nearctic, Oriental and Eastern Palae- arctic regions. A few specimens collected by Mr. J. Quinlan on the 1954 Expedition are also included. I thank Drs. W. N. Ellis and H. P. Duffels of the Zoblogisch Museum, Amsterdam and Dr. G. Petersen of the Deutsches Entomologische Institut, Berlin for the loan of type material, I thank Dr. T. Saigusa for a very useful exchange of Japanese material involving genera common to Nepal and Japan and for manuscript notes on his undescribed genera and species. I thank Mr. R. L. Coe and Mr. K. Hyatt for checking the Hindi and other Nepalese names used for the new species, the meanings of which are given in the text. Finally I thank my wife for her careful preparation of the typescript. Unfortunately I have been unable to examine or obtain information on Brunetti's types in the Indian Museum, Calcutta or Collin's types in the Leningrad Museum. 64 K. G. V. SMITH This means that comparisons with these species have been from descriptions only, and some of Brunetti's are often inadequate by modern taxonomic standards. However in most cases I am satisfied that the differences described are adequate indication that separate taxa are involved. I have stated clearly the few cases where I consider my species may prove to be conspecific with described forms and feel in these cases that the ultimate loss of a species to synonymy is better than starting a chain of misidentifications. Previously only one member of the family, Tachydromia nepalensis Brunetti, was recorded from Nepal. In the present paper 38 new species and I new subspecies are described, representing 18 genera. All type material is in the British Museum (Natural History), London. The nomenclature used for the male genitalia follows Bahrmann (1960). KEY TO GENERA AND SUBGENERA KNOWN FROM NEPAL 1 All veins running straight to wing margin without forking (except for Rs}. Cell Cu absent (except Tachydromia) ........ 2 Vein M always, and -R 4+5 often forked. Cell Cu present .... 7 2 (i) Humeri not differentiated .......... 3 Humeri clearly differentiated ......... 6 3 (2) Veins J?j and R 2+3 longer, the latter ending in costal vein well beyond middle of wing (Text-fig. 4). Front femora moderately swollen . . (DRAPETIS s.l.) 4 Veins /? x and R 2 +z short, the latter ending in costal vein only a little beyond middle of wing (Text-fig. 6). Front femora very swollen . STILPON (p. 72) 4 (3) Distinct jowls below eyes. Second antennal segment with a distinct bristle beneath s.g. CROSSOPALPUS (p. 71) No distinct jowls below eyes. Second antennal segment without a distinct bristle beneath ........... 5 5 (4) No anterodorsal bristles present on hind tibiae . . s.g. DRAPETIS s.s. (p. 65} One or more strong anterodorsal bristles present on hind tibiae s.g. ELAPHROPEZA (p. 65) 6 (2) Cell Cu absent SICODUS (p. 74) Cell Cu present TACHYDROMIA (p. 75) 7 (i) Two veins issuing from end of ist M 2 cell, neither of which is forked . . 8 Either three veins issuing from ist M 2 cell or two veins with one of them forked or ist M 2 absent .......... 9 8 (7) Cell Cu longer than cell M HYBOS (p. 81) Cell Cu shorter than cell M and square ended . . STENOPROCTUS (p. 83) 9 (7) ist M 2 cell absent ........... 10 ist M 2 cell present ........... n 10 (9) Cell Cu present. Axillary angle of wing well developed .BICELLARIA (p. 85) Cell Cu absent. Axillary angle of wing not developed . HEMERODROMIA (p. 90) 11 (9) Vein J? 4+ 6 not forked .......... 12 Vein #4+5 forked ........... 13 12(11) Front legs raptorial, i.e., front coxae greatly elongated . . CHELIPODA (p. 94) Front legs not raptorial, i.e., front coxae not elongated . HELEODROMIA (p. 97) 13 (i i) Cell Cu only about half length of cell M. Front coxae greatly elongated CHELIFERA (p. 98) Cell Cu as long as, or nearly as long as, cell M . Front coxae at most only slightly elongated . . . . . . . . . . 14 DIPTERA FROM NEPAL 65 14 (13) Axillary angle of wing well developed ...... HILARA (p. 85) Axillary angle of wing not developed . . . . . . . . 15 15 (14) Wings mottled brown with hyaline spots. Neck very high up on occiput DOLICHOCEPHALA (p. 98) Wings clear or brownish tinged, but not mottled with hyaline spots. . . 16 16 (15) Clypeus distinct and elongate and with fine vibrissae and hairs (Text-fig. 50) HYPENELLA (p. 100) No distinct clypeus ........... 17 17 (16) Vein R v setulose above (Text-fig. 63) . . . TRICHOCLINOCERA (p. 103) Vein R 1 not setulose above ......... 18 18 (17) Acrostichal bristles present .... PROCLINOPYGA (p. 104) Acrostichal bristles absent .......... 19 19(18) Scutellum hairy on disc .... ACANTHOCLINOCERA (p. 101) Scutellum bare above CLINOCERA (p. 106) TACHYDROMIINAE DRAPETIS Meigen Drapetis Meigen, 1822, Syst. Beschr. 3 : 91. No species of this genus in the restricted sense are recorded from Nepal, but I include it in the key and mention it here because usually Elaphropeza and Crosso- patyus are regarded as subgenera of Drapetis s. L. In the present paper the three groups are treated as subgenera, Elaphropeza and Crossopalpus being represented in Nepal. Subgenus ELAPHROPEZA Macquart Elaphropeza Macquart, 1827, Insect. Dipt. Nord France, 3 : 86. Ctenodrapetis Bezzi, 1904, Annls hist.-nat. Mus. natn. hung. 2 : 355. This subgenus is best represented in the Oriental region, but it is also well rep- resented in N. and S. America, Africa and Australia, though only one species occurs in the Palaearctic Region. Six species are now described from Nepal. KEY TO NEPALESE SPECIES OF Elaphropeza 1 Thorax entirely black, two or three dorsocentral bristles distinct . . kala sp. n. Thorax mostly reddish yellow ; dorsocentral bristles inconspicuous except for a strong prescutellar bristle ......... 2 2 (i) Arista densely long pubescent and thus appearing thicker, as an extension to the third antenna! segment ; smaller species (i mm.) . . uralo sp. n. Arista normal, slender ; usually larger species (1-25 mm. or more) ... 3 3 (2) Thorax and scutellum yellow ......... 4 Thorax or scutellum partly black ........ 5 4 (3) Antennae completely yellow ; occiput yellow ..... coei sp. n. Third antennal segment black ; occiput black .... litoralis sp. n. 5 (3) Head reddish yellow except for black frons ; thorax reddish yellow, scutellum black ........... ukhalo sp. n. Head black, thorax reddish yellow with a large black spot on each side above wing bases ; scutellum yellow ....... sanguensis sp. n. 66 K. G. V. SMITH Drapetis (Elaphropeza) kala sp. n. $. Head shining black, lightly dusted behind, but shining on a very broad postocular band on upper two-thirds. Occiput with sparse short yellow hairs. Frons about twice width of an ocellus above, narrowing to slightly more than width of an ocellus below. Face linear. Ocellar bristles rather weak, crossing, with a pair of weak hairs behind. A pair of strong yellow outer vertical bristles and a weak inner pair. Antennae with first and second segments yellow ; third segment black with base somewhat yellowish, short, less than twice as long as broad at base. Arista black, pubescent and a little less than twice antennal length. Proboscis short, brown. Palpi yellow, about two-thirds length of proboscis. Thorax shining black (a very light dusting is evident under higher magnification), with yellow bristles. Acrostichals absent ; dorsocentrals uniserial, the 3 or 4 posterior bristles strong ; a notopleural and a supra-alar present. Scutellum shining black on disc with margins lightly dusted and with a pair of crossing apical bristles. Abdomen yellowish at base, but otherwise shining black, with very light microscopic dusting and some rather long dark hairs. Legs slender, yellow except for last tarsal segment on all legs. Preapical anterior bristle distinct on middle femora. Middle tibiae with an anterodorsal bristle at middle. Hind tibiae with two anterodorsal bristles, a little closer to each other than either is from the ends of the tibia; apical process brownish, short and broad, but pointed. Wings clear with yellow veins. Third costal section about twice length of second section. Halteres yellow.