172 INSECUTOR INSCITI^ MENSTRUUS 



Larva: Both pairs of head hairs multiple, short. Antennae 

 very stout, dark, spicular, a large tuft from a notch at outer 

 third. Abdomen glabrous. Air-tube long, six times as long 

 as wide, tapering on basal half, pecten of about seventeen 

 teeth on basal two-fifths, five pairs of moderately long ventral 

 hair-tufts. Lateral comb of eighth segment in a triangular 

 patch. The thorax of the larva is white or azure blue, con- 

 trasting strongly with the black of the large head. They live 

 in temporary pools in the woods. 



Male genitalia : They show the typical clasp-filament of a 

 Choeroporpa without a horn-like tuft. The outer division of 

 the lobe of the side-piece bears a large leaf. The second plates 

 of the unci are bifid. The genitalia come nearest to Culex 

 mutator D. & K., but the second uncal plates have no sub- 

 basal hook. 



Zanderij, March 1, 1918. 



Cotype, No. 22705, U. S. National Museum. 



Culex (Choeroporpa) saramaccensis, new species. 



Proboscis rather long. Palpi short in the female, long in 

 the male. Antennae moderate. Occiput clothed with brown, 

 flat scales, with a dull grayish luster and many upright forked 

 scales on the nape. Mesonotum dark brown, with long nar- 

 row-curved bronzy brown scales. Scutellum with similar 

 vestiture. Abdomen with black scales dorsally, dark scaled 

 ventrally, a few dull white scales. at the sides of the segments. 

 Wings hyaline, with broadly linear to narrowly elliptical scales. 

 Legs brownish, paler on under side. 



Genitalia : Clasp-filament without horn-like tuft, side-piece 

 without a leaf, second uncal plate without subbasal hooks, 

 bifid, outer division of lobe of side-piece with single terminal 

 filament free from the others. 



Larva: Head-hairs in twos or single. Antennae large, 

 spicular, a tuft at outer third. Body hairy. Air-tube mod- 

 erate, six times as long as wide, tapering on basal half, slightly 

 curved, with five pairs of long ventral tufts. Pecten on basal 

 two-fifths, reaching beyond the first ventral tuft. Comb of 

 the eighth segment of very large spines in three rows. 



