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N0V2 0,i3.16 %} NOVITATES ZOOLOGICAE Vol. XXIII. SEPTEMBER 1916. No. 2. NEW NEOTROPICAL GEOMETRIDAE. By LOUIS B. PROUT, F.E.S. Subfamily OENOCHROMINAE 1. Dolichoneura foveata sp. no v. (J, 31-32 mm. Closely similar to convergens Warr., differing chiefly in its much smaller size and in structure. Antennal ciliation rather shorter (about as long as diameter of shaft). Forewing with M approaching SC at a good distance from base, to make room for a large, elongate fovea which extends to the base of M 2 ; rather less pure white than convergens, the proximal snbmarginal shade thickened, thus closely approaching or in places almost confluent with the distal one. Hindwing with R 1 and R 2 arising very near together and curving so as to approach even more closely in the middle of their course ; distinctions from convergens in colour and markings as on forewing. Underside much less pore white than in convergens. Aroewarwa Creek, Maroewym Valley, Surinam, July, 1905 (S. M. Klages), type in coll. Tring Mus. ; St. Jean de Maroni, French Guiana, August, paratype in coll. L. B. Prout. An interesting link between Warren's Dolichoneura and Pycnoneura, which are scarcely separable generically. 2. Pycnoneura monops sp. nov. cJ, 37 mm. Head with palpus and scaled surface of antenna blackish brown. Thorax, abdomen, and legs concolorons with wings, only the foreleg in part darkened. Forewing with apex moderately sharp, termen almost straight, only behind M 2 very faintly subconcave ; SC 1 from cell*; drab, with sparse, inconspicuous dark irroration ; lines fine ; antemedian extremely faint, sinuous, from nearly one-third costa to one-third hindmargin ; postmedian better expressed, from before two-thirds costa, oblique to R 1 , with a slight tooth outward at SC 5 , strongly toothed at R 1 , thence lnnulate-dentate, with slight proximal curves between the radials and behind M 2 ; discal dot large (1 mm. in diameter), black ; an extremely faint, crenulate whitish subterminal line ; termen with the usual black dots before and behind SC 5 , the rest of the series very minute to obsolete ; terminal line slightly and fringe * Exceedingly few examples in this genus (always difficult to obtain) were known to me when I prepared my revision for Gen. Ins. , fasc. 104. I am now able to say that in the species which passes for oxypteraria Guen (unfortunately described from a ? ) and in its close ally turpi» Warr., as also in rectilineata Warr., SC is always well stalked, in cinerea Butl. usually very shortly stalked, in ablataria Guen. (which is perhaps more of a Dolichoneura) always from the oell. 11 151

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New neotropical Geometridae

Novitates Zoologicae Tring 23: 151-190 (1916)

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