32 INSECUTOR INSClTl/t MENSTRUUS 



abdominal macrochaetae. Description is of the male only. Male front 

 at vertex fully one and one-half times greatest eye-width. Cheeks of 

 male a little less than eye-height. Epistoma only feebly prominent. 

 Parafacials rather narrow, sparsely hairy. Proboscis when extended 

 about one and one-fourth times head-height. Second antennal joint two 

 and one-half to three times as long as first ; third joint of male fully twice 

 as long as second and rounded subtriangular, lower or posterior edge 

 longer than upper or anterior, distal edge rounded-subtruncate ; outer 

 surface of third joint with the small foramen-like scar, about size of arista! 

 insertion, located as near base of joint as arista and approximated to 

 lower or posterior edge. Second aristal joint elongate, the arista genicu- 

 lated in one specimen. 



Two sternopleurjJ, three postsutural, no postacrostichal bristles, only 

 one preacrostichal on right side in both specimens and none on left side. 

 Scutellum without any discal macrochaetae, with two lateral pairs and a 

 weak apical strongly decussate pair. Thorax and head are of equal 

 width and quite narrow, scutellum is small. Abdomen is much wider 

 than thorzoc, about one and one-half times as long as wide, much swollen, 

 abruptly narrowed in front and behind ; second segment with many me- 

 dian discal macrochaetae in a bunch extending from front margin back, 

 a complete hind marginal row with a second irregular row in front of 

 these and further ones in front of latter on sides ; third segment with 

 necirly same disposition of macrochaetae but latter slightly stronger and 

 less closely placed, and in place of the median bunch only one discal peur 

 or so ; anal segment bare on broad anterior margin equalling nearly one- 

 hzJf of length, rest quite thickly covered with macrochaetae. The macro- 

 chaetae approach the spinelike form, but are more slender and pointed, 

 besides being slightly curved or reclinate. Venter with bristles or ordi- 

 nary macrochaetae on median line, but none spinelike. Apical cell nar- 

 rowly to quite v^adely open. Usually no stump or wrinkle in continua- 

 tion of fourth vein, but a very short stump showing in one wing of one 

 specimen. Apical crossvein fedntly waved like that of Copecr^pta, more 

 distinctly so in one specimen than in the other. Claws of male not espe- 

 cially elongate, about as long as last tarsal joint. 



Reproductive habit, probably leaf-larviposition of colored maggots. 



Type, Corpulentosoma cornutum, new species. 



(To be continued.) 

 Date of publication, February 28, 1914. 



