98 INSECUTOR INSCITI^ MENSTRUUS 



to a copious curving hair-tuft. Clasper very broadly and 

 irregularly articulated, apparently of three lobes. Main lobe 

 irregularly tapering, with a shoulder at one side and an angular 

 fold further out on the other side ; some minute hairs on 

 shoulder and tip. Second lobe thin, with two terminal angles, 

 one side forming a recurved hook. The third lobe is slender 

 and forked, but I cannot make out its attachment in the single 

 slide. 



The vestiture of the single specimen is not well preserved. 

 Apparently the prothoracic lobes are dark with white tip; 

 occiput dark, white scaled below, perhaps with a white margin 

 to the eyes or vertical spot. There seem to be some white 

 scales in this position. Mesonotum and scutellum dark scaled. 

 Clypeus and postnotum without scales, the lateral seta of the 

 postnotal tuft appears to have a triangularly widened tip. 

 Abdomen with the colors separated on the sides in a straight 

 line, the venter peculiarly marked, the segments having a dark 

 posterior border, which widens on the sides, broader pos- 

 teriorly, the last two segments having only a white V at seg- 

 mental base. Legs black, the mid tarsi white below continuously 

 on joints 2 to 5. The wing scales are rather broadly ovate. 

 Proboscis long, but quite stout. 



Type, male, No. 25357, U. S. Nat. Mus. ; "bred from larvae 

 found at Comacho in a tree-hole," January 14, 1922. The 

 species bred from this culture were as follows : 



Aedes thorntoni D. & K 2 



Aedes terrens Walk 3 



Limatus asullcpta Theo 1 



Haemagogus argyromeris D. & L 2 



Wyeomyia ypsipola Dyar 1 



Cnlcx corniger Theob 5 



Uranotaenia geometrica Theob 9 



Most of these are well-known tree-hole breeders ; Ciilex 

 corniger occasionally occurs in tree-holes. However, the 

 Uranotaenia geometrica is an open ground-pool breeder and 

 never occurs in tree-holes. There is, therefore, something the 

 matter with the record, and an admixture of ground-pool forms 



