402 MOSQUITOES OF NORTH AMERICA 



outer rounded and serrate along margins, the inner elliptical, serrate on outer 

 margin, serration teiminating in a laige tooth at tip close to the articulated 

 terminal spine. Harpes ^vith a long, slender inner branch which is bent at tip 

 and bears a row of teeth, Harpagones divided into a number of plates. 



Larva, Stage IV (plate 113, fig. 382). Head tiansvcvs'^. mnch bioader than 

 long, subquadrate, strongly convex at the eyes. Antennse long, rather stout, 

 a tuft at outer third, part beyond slender. Up]^ 2V pair of dorsal head- 

 hairs double, short, lower pair single, long ; ante antennal tufts multiple. Body 

 with skin glabrous; lateral hairs in threes on third to sixth abdominal segments. 

 Comb of eighth segment of about twelve spines in a single, curved row, lower- 

 most spines a little dislocated. Air- tube scarcely three times as long as wide, 

 tapering outward 'y, slightly cur\ed forward on apical portion; terminal hooks 

 large, with median tooth; eight tufts of long hairs along posterior margin, 

 reaching from near base to apex, double at base, multiple at apex; pecten of 

 long teeth, reaching beyond basal third of tube. Anal stgment longer than 

 wide, ringed by the plate; dorsal tuft of three unequal hairs on each side; 

 ventral brush well developed, confined by the chitinous ling. Anal gills large, 

 stout, tapoiing to rounded tips, equa\ 



The larvae Jive in tempoiaiy pciJs, accOiJirg to Dr. Gxabham's note. He 

 says : " The usual position cf the larva wii on its back at the bottom cf the jar or 

 hooked up en the sides by its siphon. It appaiently never rose to the surface 

 except jujt before pupating." 



Island cf Jamaica, West Indies. 



Kingston (M. Grabham). 



CULEX FLORIDANUS (Dyar & Knab). 



Mochlostyrax floridanus Dyar & Knab, Proc. Biol. Soc. Wash., xix, 171, 1906. 

 Original Description of Mochlostyrax floridanus: 



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 transverse, eyes 

 bulging, a large notch at insertion of antennae; clypeus shallowly emarginate with 

 two spines; antennae long, a small notch at outer third bearin? the long hair tuft; 

 the two longest of the apical spines placed before apex. Both head hairs single, 

 small, a third hair below, anteantennal tuft large, multiple. Lateral abdominal hairs 

 in twos on the thiid 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, roundedly tapered ou the posterior side, with a pair of l^ooks at tip; 

 eight long tufts on the posterior margin in a straight row, two of them within the 

 pecten; two small lateral tufts. Tufts behind the comb large. Anal segment longer 

 than wide, ringed; ventral brush moderate, dorsal tuft few haired. Anal gills rather 

 long, the upper pair considerably shorter than the lower ones. 



Larva; 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. Eat., xxxviii, 318, 1906). 

 Dr. Grabham has kindly sent us larvae and they agree very closely with our floridanus. 

 We consider them conspecific. 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. 



Description of Female and Larva of Culex floridanus (Male Unknown) : 



Female. Proboscis moderate, swollen at tip, labellas conically tapered; vesti- 

 ture black with a bronzy reflection; setae minute, cuivcd, black, those on labellae 

 more prominently outstanding. P?l}i short, cne -fifth as long as proboscis, 

 black, with a few outstanding setae at base. Antennae moderate ; joints subequal, 

 rugose, pilose, blackish, second joint a little longer than third ; tori subspherical, 

 vfith a cup-shaped apical excavation, luteous, shading to brown within; hairs of 

 whorls sparse, moderate, black. Clypeus rounded triangular, convex, brown, 

 nude. Eyes black. Occiput blackish, clothed with broad, flat, black scales ^vith a 



