150 INSECUTOR INSCITI^ MENSTRUUS 



A NEW SUBGENUS OF CULEX LINN 



(Diptera, Culicidce) 



By HARRISON G. DYAR 



Mrs. J. Bonne- Wepster kindly gave me a new species of 

 Cidex which does not agree with any of the tropical sub- 

 genera known to me. It may possibly belong to Aedinus 

 Lutz, described from Brazil, but the male structure of this is 

 unknown to me. 



Culex (Eubonnea, new subgenus) tapena, new species. 



Male. Antennae plumose, the last two joints long and 

 ciliate. Palpi short, about one-sixth as long as the proboscis, 

 slender. Proboscis appearing jointed at the outer third, black- 

 ish. Mesonotum bronzy brown, with curved dense short 

 spiny hairs, no scales ; a double impressed paler brown dorsal 

 bare line. Abdomen black, with dorsal basal segmental nar- 

 row whitish bands. Legs bronzy black, the femora paler 

 below toward base, without white. Wing-scales rather broadlv 

 oval. 



Genitalia. Side pieces about three times as long as wide, 

 excavate at base ; a long stout arm near middle, bearing a 

 shoxt thick tapered spine, bent a little toward base ; beyond 

 are eight stout setae, two of which are large and blade-shaped. 

 Clasp-filament narrowed in the middle, expanded at tip, 

 emarginate, almost cleft, one side lip-like, the other slender, 

 tapered, with articulated subterminal spine. Harpes comb- 

 shaped, with six distinct teeth. Unci reduced, the first plate 

 small, triangular, the second straight, pointed, constricted 

 toward base. Basal lobes long, finger-shaped and joined to- 

 gether on a bridge, the tips bluntly rounded, and bearing two 

 rows of small setae arising from tubercles. 



Type, male, No. 22633, U. S. Nat. Mus. ; Paramaribo, 

 Surinam, January 5, 1919 (Mrs. J. Bonne- Wepster), captured 

 indoors at 7 p. m. Another specimen was bred from a pupa 

 in a permanent pool with much vegetation, December 5, 1918. 



Date of publication, November 17, 1919. 



