CULEX MOLLIS 267 



in the female, the stems of the fork-cells longer, vestiture less abundant. 

 Abdomen with the white basal bands broader than in the female, expanded 

 laterally on sixth and seventh segments, the sides densely hairy. Claw formula, 

 1.1-1.1-0.0. 



Length : Body about 3 mm. ; wing 2.5 mm. 



Genitalia (plate 14, fig. 99) : Side-pieces over twice as long as wide, tips coni- 

 cally tapered; lateral prominence quadrate, bearing three spines, a leaf -like 

 appendage, an expanded rod, and a seta. Clasp-filament moderate, uniform, 

 simple, with a terminal claw. Harpes with inner arm erect, thick, crowned with 

 spines, outer arm curved, pointed, rather long. Harpagones divided into several 

 plates, one of them large and divided into three large teeth. 



Larva, Stage IV (plate 98, fig. 321). — Head rounded, somewhat wider than 

 long, bulging at the eyes ; antennas long, rather slender, a tuft well beyond the 

 middle, the part beyond it slender, base of shaft spinulate ; head-hairs in threes, 

 ante-antennal tufts multiple. Body with the skin glabrous ; lateral abdominal 

 hairs in twos after second segment; lateral comb of eighth segment of many 

 spines in a large triangular patch. Air-tube six times as long as wide, tapering 

 outwardly, subfusiform; pecten of long teeth running somewhat spirally and 

 reaching nearly middle of tube ; a two-haired tuft within tip of last pecten tooth, 

 and two more, the middle one moved laterally out of line. Anal segment longer 

 than wide, ringed by the plate ; dorsal tuft of three hairs of different lengths on 

 each side; lateral hairs single, small; ventral brush confined by the chitinous 

 ring. Anal gills about as long as the segment, bluntly pointed, equal. 



The larvae live probably in holes in rocks. Mr. Busck found them at the 

 bottom of an abandoned prospect-hole, 30 feet deep, in a mountain side. The 

 hole contained clear sulphurous water. 



Island of Dominica, West Indies. 



Dominica, July 38, 1905, larvse in a prospect-hole (A. Busck). 



CULEX MOLLIS Dyar & Knab. 



Culex carmodyw mollis Dyar & Knat), Proc. Biol. Soc. Wash., xix, 171, 1906. 

 Culex carmodym mollis Theobald, Men. Culic, t, 613, 1910. 



Obiginal Desceiption of Cttlex caemodt^ molus: 



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 carmodyw Dyar 

 & Knab, described from Santo Domingo (Joum. 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 tarsal joints with a few white scales at the 

 apices of the joints also. In both the Santo Domingan carmodyw 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 carmodyw there is no 

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

 tint at the joint; in mollis the bands are very distinct although extremely narrow, 

 hardly wider than the length of a scale. 



Six specimens, four males, two females. 



Type.— Ca.t. No. 10,022, U. S. Nat. Mus. 

 Desceiption of Female, Mai.e, and Labva of Ctjiex mollis: 



Female. — Proboscis moderate, subcylindrical, uniform, labellse conically 

 tapered ; vestiture bronzy brown ; setae minute, curved, black, those on the labellae 

 more prominently outstanding. Palpi small and slender, one-fifth as long as 

 proboscis, black, with a few outstanding setae. Antennae with the basal joints 

 somewhat shorter, rugose, pilose, black, the second joint slightly enlarged ; tori 

 subspherical, with a cup-shaped apical excavation, luteous, blackish on inner 

 side; hairs of whorls sparse, moderate, black. Clypeus rounded triangular, 

 doubly excavated at base, dark brown, nude. Eyes black. Occiput brown, 

 clothed with narrow, curved, lustrous pale-brown scales and many erect, forked 



