154 



American Midland Naturalist Monograph No. 3 



broad, intermixed dark brown and white, the white scales in no definite 

 arrangement; fringe entirely dark. 



ADULT MALE. — Coloration similar to that of female, but with the ring of 

 the proboscis narrower. TERMINALIA (Fig. 80B). Ninth tergite (IX-T) with 

 lobes (IXT-L) broadly rounded, widely separated, each bearing many scat- 

 tered setae. Tenth sternite (X-S) prominent, heavily sclerotized. Phallosome 

 (Ph) subcylindrical (slightly narrower across apical third than across base), 

 bluntly pointed or rounded at apex, open ventrally, closed dorsally; middle 

 of each plate with a narrow rounded portion of its inner ventral margin turned 

 ventrad (not a distinct triangular projection as in P. discolor.) Claspette (CI) 

 with stem curved, slender, expanded apically into a triangular crown; lower 

 portion of crown attached to basal third of basistyle; apical portion free and 

 bearing a row of six or seven long pointed apically feathered blades and a 

 single apically feathered seta. Basistyle (Bs) nearly two and one- half times as 



f. X.AS10H 



Fig. 80. Psorophora confinnis (Lynch Arribalzaga). A, Hind leg. 

 B, Male terminalis. C, Crown of claspette. 



