78 INSECUTOR INSCITI^ MENSTRUUS 



Type, male, No. 22746, U. S. Nat. Mus. ; 'iarv« in a ditch, 

 interior of colony, January, 1919," Surinam (J. Bonne- 

 Wepster). 



Culex (Choeroporpa) xivylis, new species. 



Clasp-filament with the tip moderate, snout-shaped, the spine 

 appendiculate. Outer division of lobe of side-piece short, a 

 short broad inner arm, bearing a long hooked filament and a 

 shorter blade-shaped one ; middle filament and the three outer 

 ones all close together and occupying the outer aspect of the 

 lobe, reaching the base on account of the shortness of the lobe. 

 Inner division of lobe of side-piece with the arms not sepa- 

 rated, the inner about half as long as the outer, each with a 

 long filament with bent hooked tip. Second uncal plate fur- 

 cate, the inner limb horn-like, the outer pointed, laterally di- 

 rected ; a hook-like plate projecting from the base of the inner 

 limb. First plate long and fan-shaped. Articulated plate very 

 large, trigonate and deeply excavate at tip, infuscated. Plates 

 at bases of side-pieces distinct, large, infuscated. Basal hooks 

 long, recurved, pointed. Basal appendages moderate, elliptical, 

 oblique, remote, setose. 



The adult has the head scales partly whitish, mesonotum 

 bright bronzy brown, abdomen black, with basal segmental 

 narrow white bands. Legs blackish brown. Male palpi longer 

 than the proboscis, pointed. Wing-scales moderately ovate on 

 forks of second vein. 



Types, four males. No. 22747, U. S. Nat. Mus.; (type) 

 "larva in ground pool, interior of colony, January 24, 1919," 

 Surinam (J. Bonne- Wepster) ; "pupa in rice field, coastal re- 

 gion, February, 1917," Surinam; "sandy district of colony, 

 larvae in pools," Surinam (J. Bonne-Wepster). 



Larva. Head broad, rounded, cloudily infuscated ; antennae 

 large, with a notch and large tuft at outer third, the base and 

 all of the outer segment infuscated. Head-hairs both single, 

 the upper delicate. Skin finely pilose on thorax and on end of 

 anal segment. Lateral comb of the eighth segment of many 

 small spines with widened tips in a triangulate patch four rows 



