INSECUTOR INSClTliE M^NSTRUUS 73 



Type, male, No. 22742, U. S. Nat. Mus. ; "larvse in pool in 

 the woods, interior of the colony, December 18, 1918," Surinam 

 (J. Bonne- Wepster). 



The larva is as in maxinocca, although as the head hairs and 

 antennae are lost, it is possible that they show differences, 



Culex (Choeroporpa) vaxus, new species. 



Clasp-filament narrowly snout-shaped, the spine appendicu- 

 late. Outer division of the lobe of the side-piece columnar, 

 with a slender inner arm, bearing a long filament with hooked 

 tip and a short blade-shaped filament; middle filament blade- 

 shaped, arising near the outer group of filaments ; a slender 

 spatulately expanded filament inserted close to it and a little 

 basad. Outer filaments curved, blade-shaped. Inner division 

 of lobe of side-piece with the arms well separated, the outer 

 long, the inner short, each with a long strong filament with 

 expanded pointed tip. Second uncal plate furcate, the inner 

 limb denticulate, the outer one smooth ; a large very stout 

 curved horn arising about the middle of the stem. Articulated 

 plate large, expanded, with excavate margin, inf uscated. Basal 

 hooks long, slender, strongly recurved, and with pointed tips. 

 Basal appendages moderate, slightly separated, oblique, ellip- 

 tical, with small setae. 



The adult has the head with many white scales, mesonotum 

 bronzy brown, abdomen black with rather broad basal seg- 

 mental white bands. Legs black, the knees pale. Wing-scales 

 rather narrowly ovate. 



Types, three males. No. 22743, U. S. Nat. Mus.; (type) 

 "larva in a ditch, interior of colony, January 18, 1919," Suri- 

 nam (J. Bonne- Wepster) ; "pupa found in a swamp, Lawa 

 River, March 5, 1917," Surinam (J. Bonne- Wepster). 



The larva has the head broad, lightly inf uscated ; antennae 

 large, with notch and tuft at outer third, infuscated at base 

 and on both sides of the tuft; both head-hairs single. Skin 

 spicular on thorax and end of anal segment. Lateral comb 

 of the eighth segment of small spines in four rows, the pos- 

 terior ones only slightly larger, some 30 spines in the patch. 



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