154 INSECUTOR INSCITI^ MENSTRUUS 



NEW MOSQUITOES FROM COSTA RICA 



(Dipt era, CuUcidee) 



By HARRISON G. DYAR 



Culex (CarroUia) metempsyta, new species. 



Male hypopygium : Clasper uniform, rather thick, the tip 

 narrower and with a small point above the short thick spine 

 and a seta below this ; outer division of lobe of side piece rep- 

 resented by a stout seta close to the insertion of the clasper ; 

 inner division of lobe of side piece a long arm, arising from 

 near base of side piece, tapering gradually, with a number of 

 coarse setae on the shaft ; two terminal filaments, one furcate, 

 both bent and with sharp pointed tips. 



Male and female : Proboscis, palpi, mesonotum and dorsum 

 of abdomen black-scaled ; pleurae green ; sides of abdomen with 

 basal segmental white spots with pearly and violet luster, the 

 spot on the seventh segment detached from base ; venter green- 

 ish or whitish, the apices of the segments dark; legs black, 

 femora whitish below and at base, mid femora with two, hind 

 femora with one pearly violet spots. Male palpi three-fourths 

 as long as the proboscis, female palpi nearly one-fourth as 

 long as the proboscis. 



Types, seven males and eleven females, No. 24863, U. S. 

 Nat. Mus. ; Alajuela, Costa Rica, July and August, 1921 

 (A. Alfaro). 



The described species of CarroUia may be separated as 

 follows : 



1. Tip of clasper nearly simple, with short terminal spine, 



metempsyta Dyar 



Tip of clasper distorted and lobed 2 



Tip of clasper subspherical 3 



2. Outer arm of lobe of side piece a rod with apical spines, 



bonnei Dyar 

 Outer arm reduced to a spine sccunda Bonne- Wepster & Bonne 



3. Inner arm of side piece preceded by a patch of setae, 



infoliata Bonne- Wepster & Bonne 

 Inner arm of side piece followed by a row of foliate scales, 



urichii Coquillett 



