INSECUTOR INSCITI^ MENSTRUUS 61 



Culex (Choeroporpa) phlogistus, new species. 



Clasp-filament rather thickly snout-shaped ; dorsal pile short 

 but abundant. Outer division of lobe of side-piece short, a 

 little produced on the inner corner, bearing there two blade- 

 shaped filaments, one of which (the outer) is only a little 

 shorter than the other which is hooked at tip ; middle filament 

 strongly blade-shaped and long, closely followed by three 

 broadened curved filaments on the outer aspect of the apex. 

 Inner division of lobe of side piece with the arms separated, 

 the outer rather short, the inner very short, each with a long 

 curved filament with expanded tip, pointed on one side. Sec- 

 ond plate of the unci furcate, one limb finely pilose, denticxilate 

 throughout on its inner surface, the other smooth ; a long 

 sharp spine arising at the base of the stem. First plate emar- 

 ginate on the side for the insertion of the articulated plate, 

 which is very distinct, large and broadly rounded, showing a 

 point near the middle of its margin. Basal hooks fairly long 

 and recurved, but somewhat broadened and gently curved, not 

 sharply hooked at the end. Basal appendages large, elliptical, 

 oblique, contiguous, each bearing very many setae. Comb- 

 teeth of the harpes fine and delicate. 



The adult presents no distinguishing characters ; bronzy 

 brown mesonotum, elliptical flat white scales on the head; 

 abdomen wholly black ; legs without knee-spots ; wing-scales 

 narrowly ovate, becoming ligulate on the base of the third vein 

 and on the fifth vein. Palpi of male longer than the proboscis, 

 pointed. 



Type, male, No. 23735, U. S. Nat. Mus.; "larvae foimd in 

 pools in the woods. May. 1919, interior of colony," Surinam 

 (J. Bonne-Wepster). 



Larva. Head large, broad, darkly inf uscated ; antennae long, 

 with a notch at the outer third, bearing a large tuft ; inf uscated. 

 except the middle of the basal segment, which is whitish. 

 Mental plate with a central tooth, four small ones and two 

 larger ones on each side. Head hairs, upper small, in two or 

 three, lower long, single. Air-tube slender, straight, some 

 eight times as long as wide. pale, with a dark band at the 



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