INSECUTOR INSCITI^ MENSTRUUS 185 



cipally in a pair of small round subdorsal dots. Abdomen 

 black-scaled, with basal segmental white bands, widening a 

 little in the middle and hardly widening at all at the sides ; 

 venter pale scaled. Wing scales dark, the costa, first and third 

 veins closely scaled and appearing darker than the others. Legs 

 black-scaled, femora and tibiae whitish-lined below ; tarsi nar- 

 rowly but distinctly white-ringed at bases and apices of the 

 joints, especially at the apices, the tibiae also white at base 

 and apex narrowly. Claws simple. 



Male. — Proboscis with a pale spot beyond the middle, labellae 

 pale. Palpi exceeding the proboscis, black ; broad white rings 

 at the bases of the joints and the middle of the long joint; last 

 two joints bristly. Antennae normal, plumose. Mesonotum 

 with more silvery scales than in the female, especially poste- 

 riorly about the antescutellar space. Venter of abdomen with 

 a blackish band at the base of the penultimate segment. Claws 

 one-toothed. 



Genitalia. — Side pieces about twice as long as wide, strongly 

 excavated at base ; a quadrate hairless lobe arising from the 

 apex of the basal emargination, bearing two short, stout, 

 thickened appendages and a smaller one just below. Setae 

 of side pieces short, evenly distributed without, gathered in 

 little patches within, one group on each side of the lobe, one 

 at the outer third of the side piece and a larger patch just 

 before tip. Clasp filament long, slender, uniform, with minute 

 terminal spine. Harpes with a long basal branch, the tips 

 rather delicate, curving over ventrally and densely covered with 

 fine spines. Unci divided into three plates, the first slender, 

 straight, upright, pointed at tip ; second rounded, capitate, 

 laminate, the profile of the laminae spinous, heavily pigmented ; 

 third short, angularly bent and projecting outward at right 

 angles. No basal appendages ; no scales. 



Types, one female, three males, No. 21570, U. S. Nat. Mus. ; 

 Governor's Harbor, Eleuthera, Bahamas, July fi, 1903 (T. H. 

 Coffin). 



The new subgenus is based on the peculiar male genitalia. 

 The lobes of the side pieces are quite unlike those of any Culex 

 proper and are closely similar to Deinocerites. The harpes, 



