Dyar anclKnah — Some American Mosquitoes. 171 



branch of the fifth vein (cj*) has the scales narrowly linear and outstand- 

 ing, while in bastagarius they are narrowly obovate, grading into those of 

 the veins above. 



One male, bred from larvae in small grassy pools at Laventille, Trinidad, 

 by Mr. F. W. Urich. Two other males are in the collection, bred by Mr. 

 A. Busck from unisolated larvae at Arima, Trinidad. 



Type.— Cat No. 10,018, U. S. Nat. Mus. 



Culex carmodyae mollis siibsp. nov. 



Mr. Urich has sent us a series of isolations bred from larvae in a hollow 

 tree at Sangre Grande, Trinidad. The larvae are so near to those of Culex 

 carmodyae Dyar &. Knab, described from Santo Domingo (Journ. N. Y. Ent. 

 Soc, xiv, 210, 1906), that we are unable to distinguish them. The adults, 

 however, differ in having very narrow white bands at the bases of the tar- 

 sal joints with a few white scales at the apices of the joints also. In both 

 the Santo Domingan carmodyae and the Trinidad representative, mollis, the 

 hind tibiae have a line of bluish white scales above, the legs being black, 

 the ends of the hind tibiae light brown. In carmodyae there is no trace of 

 white tarsal bands, the legs being black, with a scarcely lighter brownish 

 tint at the joints ; in mollis the bands are very distinct although extremely 

 narrow, hardly wider than the length of a scale. 



Six specimens, four males, two females. 



Tyjje.— Cat. No. 10,022, U. S. Nat. Mus. 



Genus MOCHLOSTYRAX Dyak & Knab. 

 Mochlostyrax floridanus sp. nov. 



The larva falls in the table (Journ. N. Y. Ent. Soc, xiv, 223, 1906), with 

 pilosus D. & K., but the body is glabrous. Head broad and squarely trans- 

 verse, eyes bulging, a large notch at insertion of antennae; clypeus shal- 

 lowly emarginate with two spines ; antennae long, a small notch at outer 

 third bearing the long hair tuft ; the two longest of the apical sjiines placed 

 before apex. Both head hairs single, small, a small third hair below, ante- 

 antennal tuft large, multiple. Lateial abdominal hairs in twos on the 

 third to sixth segments. Comb of the eighth segment of 12 scales in a 

 strongly curved, single, rather irregular row. Air tube three and a half 

 times as long as wide, roundly tapered on the posterior side, with a pair of 

 hooks at tip ; eight long tufts on the posterior margin in a straight row, 

 two of them within the pecten ; two small lateral tufts. Tuft behind the 

 comb large. Anal segment longer than wide, ringed ; ventral brush mod- 

 erate, dorsal tuft few haired. Anal gills rather long, the upper pair con- 

 siderably shorter than the lower ones. 



Larvae from Estero, Florida (J. B. VanDuzee) ; no adults. 



Type.— Cat No. 10,025, U. S. Nat. Mus. 



This may be a synonym of M. jamaicensis Grabham (Can. Ent., xxxviii, 

 318, 1906). Dr. Grabham has kindly sent us larvae and they agree very 

 closely with our Ji or i da mis. We consider them conspecitic. However, Dr. 

 Grabham gives several differential points in his description, and, as whole 

 larvae are sent us, not isolations, there is a chance that a mixture of species 

 occurred. 



