96 INSECUTOR INSCITI^ MENSTRUUS 



Atherigona pulvinata Grimshaw. 



Has all the characters enumerated as generic, but the small 

 dorsocentrals appear to increase by one before and behind, 

 making the formula 5, 3 ; the anterior acrostichals also begin 

 with three rows, increasing irregularly to five. Lower sterno- 

 pleural farther back. 



Male. General color opaque gray, mesonotum and most of 

 the pleura and back of head black in ground color, the re- 

 mainder yellow. Antennae blackish apically, reddish at base, 

 third joint about four times the second; arista thickened on 

 basal two-fifths, its penultimate joint rather distinct; palpi 

 brownish-yellow, long; upper four or five of the row of post- 

 ocular cilia stout, upcurved. 



Humeri and most of scutellum yellow ; small hairs of meso- 

 notum rather coarse and scattered, scutellum with long apical 

 pair, two lateral, one small discal, lower sternopleural almost 

 below the hind one but not approximated to it ; calypters white, 

 halteres light yellow. 



Abdomen yellow, broad at base and abruptly tapering, curved 

 downward ; first two segments large dorsally, the second ter- 

 gite broad on its deflected edges, covering the corresponding 

 part of the much smaller third and fourth segments. Dorsally 

 the first segment has a pair of large, vague, brown discolora- 

 tions, the second a pair of widely separated roundish black 

 spots behind the middle, the third a similar pair not so much 

 separated and smaller, the fourth a pair of the same size but 

 closer together, all deep black on yellow ground. The small 

 hypopygium is bent forward, its margin notched and blackened 

 below, the homology obscure. 



Legs and coxae yellow, front legs infuscated from tips of 

 femora; middle and hind tarsi black at base, somewhat paler 

 apically ; hind tibiae a little infuscated. Front femur with a 

 tuft of short, soft hairs above just at tip; front tibia without 

 bristles, mid with one small behind near middle, hind with 

 one small on outer hind side just below middle and one each 

 on outer front and inner hind side at a slightly lower level. 

 Claws and pulvilli short. 



