AT ARE A. 435 



set on the thorax ; thoracic suture distinct. Abdomen normal. 

 Genital organs of the male large and hairy ; the basal pieces leave 

 an open interval between them, even when the claspers are folded 

 together; the ends of the claw-shaped appendages are distinctly 

 bifid, showing that they consist of two closely approximated 

 horny pieces ; a short stump takes the place of the ventral plate, 

 one of the specimens having a " long curved aculeus " projecting 

 on the underside. Leys moderately long, comparatively stout, 

 finely pubescent ; ungues smooth, empodia distinct : tibiae pro- 

 bably without spurs at the tip.* Winc/s with one submarginal 

 cell, four posterior cells and a discal cell ; no marginal cross-vein ; 

 tip of auxiliary vein and origin of 2nd longitudinal vein at a 

 little beyond the middle of the wing ; praefurca short, curved, 

 barely one-third as long as remainder of wing ; the 3rd vein with 

 a short basal portion, which is approximately in a line with the 

 proximal side of the discal cell and the posterior cross-vein ; discal 

 cell approximately square, half the length of the 2nd and 3rd 

 posterior cells ; oth vein only slightly bent at its junction with 

 the posterior cross-vein ; 6th and 7th veins nearly straight. 

 Range. India, Australia, United States, West Indies. 



315. Atarba flava, sp. nov. (PI. VIII, fig. 15.) 



<$ $ . Head and all its appendages pale buff-yellow, sometimes 

 a little ochraceous. Frons one-fourth the width of the head, very 

 slightly narrower towards antennae ; eyes barely contiguous on 

 underside ; vertex and back of head with long yellow hairs, which 

 are present on the frons also. Proboscis robust, of moderate length, 

 palpi a little darker, both with yellow hairs. Thorax wholly 

 concolorous, dorsum elevated ; some long yellow hairs on the 

 shoulders and towards the margins. Abdomen concolorous, rather 

 liberally covered with long pale yellow hairs ; margins of segments 

 with a trace of a brownish tinge. Ovipositor brownish yellow. 

 Leys concolorous, with rather thick pale yellow pubescence ; tips 

 of femora narrowly, tips of tibiae more narrowly, and tips of 

 each tarsal joint almost imperceptibly black. Wings yellow ; veins 

 yellow, distinct. Auxiliary vein ending at some distance beyond 

 the origin of the 2nd longitudinal, which originates just before the 

 middle of the wing, the praefurca being nearly as long as the 

 remaining portion ; the subcostal cross-vein placed half-way 

 between the origin of the 2nd vein and the tip of the auxiliary ; 

 the 1st longitudinal vein ending about opposite the distal side 

 of the discal cell ; basal section of 3rd vein longer than anterior 

 cross-vein, which is placed at an angle of 45 with the corner of 

 the discal cell ; this latter a little longer than broad, about half 



* Osten Sacken in his description of this genus left the question of the 

 presence or absence of spurs at the tip of the tibiae unsettled, as in the 

 specimens before him, the feet were absent, but he notes a recollection of 

 having seen spurs on the middle tibia before they were broken off. 



2 F 



