Sept., I9I3-] Felt: Descriptions of Gall Midges. 219 to the apical fifth and irregularly oval spots between the fifth vein and the posterior margin, one on each side of the branch, these being yellowish. Halteres yellowish. Legs mostly a brilliant orange yellow, the femora and tibiae black-banded apically ; claws long, stout, curved at the distal fourth, simple, the pulvilli rudimentary. Genitalia : basal clasp segment moderately long, stout ; terminal clasp segment long, stout, smooth, except for a swollen setose area at the external angles on the basal fourth ; dorsal and ventral plates apparently missing. Harpes fused to form a chitinized, spinose tube surrounding the style. Female. — Length 4 mm. Antennae extending to the third abdominal seg-ment, sparsely haired, pale yellowish or yellowish orange, distally red; 14 segments, the fifth with a stem % the length of the cylindric basal enlarge-ment, which latter has a length three times its diameter, bears low circumfili near the basal fourth and apically, and a scattering, broad whorl of moderately long setaa near the distal third; terminal segment slightly reduced, with a length three times its diameter and apically a stout, tapering process about half the length of the basal enlargement. Ovipositor short, tapering, the terminal lobes narrowly lanceolate, with a length three times the width and sparsely setose. Other characters practically as in the male. Type Cecid 02386. A SYNOPSIS OF THE DIPTEROUS GROUPS AGRO-MYZIN^, MILICHIINiE, OCHTHIPHILIN^ AND GEOMYZIN^.i By a. L. Melander, Pullman, Washington. There need be no apology offered for the issuance of the following paper. Our species have been neglected; many of the commonest forms remain unidentified; there is no adequate tabulation of the spe-cies or even of the genera, and the determination, therefore, of a species necessitates laborious searching among scattered descriptions; furthermore, a surprising number of European species occur also in America. Although based almost entirely on my own collection, and therefore necessarily far from a complete treatment, this contribution brings to light so many species new to America as to justify its ap-1 Contribution from the Zoological Laboratory of the State College of Washington.