CULEX JENNINGSI 445 



insertions of hair- whorls ; hairs long, dense, black. Coloration similar to the 

 female. Wings narrower than in the female, the stems of the fork-cells al)out 

 the same, vestiture somewhat more sparse. Abdomen elongate, subcylindrical, 

 somewhat depressed, very gradually enlarged towards apex ; lateral white spots 

 larger, particularly on seventh segment; lateral ciliation moderate, rather 

 sparse, brown. Claw formula, 1.1-1.1-0,0. 



Length : Body about 2.5 mm. ; wing 2 mm. 



Genitalia : Side-pieces over twice as long as wide, conical ; a long, slender 

 prominence near the middle bearing two stout rods with hooked tips ; a group of 

 dense setae near the tip. Clasp-filament stout, moderate, narrowed at tip, bear- 

 ing two articulated terminal claws. Harpes with a comb-shaped process at end 

 of a long rod, both harpes and harpagones plate-like, divided, revolute and super- 

 posed. Unci slender, approximate, with recurved tips. No basal appendages. 



Larva, Stage IV (plate 111, fig. 373). Head rounded, widest through the, 

 eyes, a large notch at insertion of antennae, front margin arcuate. Antennas 

 long, slightly curved, smooth, a large tuft from a notch at apical third ; three 

 long setae, a short one and a digit at tip. Upper pair of dorsal head-hairs 

 multiple, lower pair single; antc-antennal tuft multiple, short. Mental plate 

 small, triangular, with a large prominent central tooth and nine on each side, 

 basal ones small and remote. Mandible triangular, base produced into a rounded 

 prominence; three filaments before tip; an outer row of cilia from a collar; a 

 row of high conical prominences on outer margin, each bearing a tuft of long 

 fine hairs ; dentition of a single tooth on a prominence with a row of thick spines 

 below ; a spine before, a long smrooth filament and five serrate hairs within ; 

 process below sloping obliquely basally, widely but shortly furcate, with a median 

 row of hairs and a tuft at tip of each limb ; basal angle small, with a row of hairs 

 within ; a row of hairs at base. Maxilla elongate, rounded at tip, divided by a 

 suture ; inner half with long spines along margin and two rows of cilia within, 

 a long spine at outer third : a row of long hairs at tip running down along the 

 suture ; outer half with two small filaments next sviture at lower third. Palpus 

 rudimentary, with four long digits. Thorax rounded, wider than long. Abdo- 

 men moderate, anterior segments shorter; lateral hairs in threes on first seg- 

 ment, in twos on second to fifth, single on sixth ; tracheal tubes narrow, angled 

 in the segments; skin glabrous. Air-tube very long, slightly widened at base, 

 over sixteen times as long as wide; pecten sparse, of long simple spines, not 

 reaching basal sixth ; four short, slight hairs on posterior margin beyond pecten. 

 Lateral comb of eighth segment of many spines in a triangular patch ; anterior 

 spines slender, pointed, posterior ones larger, thick and rounded, all smooth. 

 Anal segment twice as long as wide, ringed by the plate ; dorsal tuft of two long 

 hairs on each side ; a small lateral hair ; ventral brush moderate, confined to the 

 barred area. Anal gills longer than the segment, evenly tapered. 



The larvae live in the water between the leaves of Bromeliacea?. The eggs are 

 inclosed in a gelatinous mass and deposited in the water. Mr. Busck says : 



" The eggs of this species are very remarkable, quite different from any mos- 

 quito eggs at present known. They are laid in an egg-shaped, gelatinous mass 

 about 6 to 10 mm., which suggests a mass of frogs' eggs. The masses contained 

 about twenty-five eggs, each of which is oblong, more pointed at one end and 

 rounded at the other, and each surrounded by its own spherical gelatinous 

 envelope, about 2.5 mm. in diameter. The egg-mass floats at the surface of the 

 water, kept buoyant by small air-bubbles, one near the end of each egg. The 

 gelatinous substance is consumed at least partly by the newly hatched larvae." 



Central America. 



