434 MOSQUITOES OP NOETH AMERICA 



panded; dorsal white bands somewhat broader and present on all the segments; 

 lateral dilation sparse but rather coarse, pale brown. On the mesonotum the 

 markings sometimes differ from those of the female, the silvery scales being 

 continued across the middle of the disk. Fore tarsi with a silvery spot at base 

 of the second joint in some specimens. Wings much narrower than in the 

 female, the stems of the fork-cells longer, vestiture sparse. Claw formula, 

 3.1-1.1-0.0. 



Length : Body about 2.5 mm. ; wing 3.5 mm. 



Genitalia (plate 8, fig. 56) : Side-pieces twice as long as wide, tips conically 

 tapered, a subapical rounded prominence bearing setae only, preceded about 

 middle of side-piece by two rods with curved tips on separate peduncles ; clasp- 

 filament small, slender with an articulated terminal spine. Harpes with a 

 slender branch, curved at tip, bearing a row of five teeth. 



Larva, Stage IV (plate 111, fig. 376) . — Head rounded, widest through eyes, a 

 large notch at insertion of antennae, front margin roundedly angled, with an ex- 

 cavation between elypeal spines. Antennae rather large, sparsely spined at base, 

 a large tuft at outer third which is without a distinct notch ; three long setae, a 

 short one and a long digit at tip. Mental plate triangular, with a stout central 

 tooth and seven on each side, basal ones a little larger and more remotely placed, 

 last one minute or rudimentary. Mandible triangular, outer basal angle pro- 

 duced into a rounded lobe directed basally ; three filaments and a tuft of hairs 

 before tip; an outer row of ciUa from a coUar; a row of rounded conical promi- 

 nences on outer margin, each bearing a tuft of plimiose hairs ; dentition of a 

 single tooth on a process with a row of short, thick spines below ; a spine before, 

 a long smooth filament and a row of feathered hairs within ; process below curved 

 basally, widely furcate, upper limb short and rounded, a longitudinal row of 

 hairs and a tuit at tip of each limb ; basal angle absent, a row of hairs within; a 

 row of hairs at base. Maxilla elongate, truncately roxmded at tip, evenly divided 

 by the suture; inner half with very long spines on margin and two shorter 

 rows of spines within ; a long spine at outer third ; a row of long hairs at tip 

 running down along suture ; outer half with two slender filaments at basal third. 

 Palpus small and slender, with four long straight digits. Thorax rounded, wider 

 than long. Abdomen moderate, anterior segments shorter; lateral abdominal 

 hairs in fours on first segment, in twos on second, in fours on third to fifth, a 

 single long hair on sixth; skin glabrous. Air-tube very long and slender, 

 slightly tapering at base, nine times as long as wide ; with or without a rounded 

 swelling at outer third ; pecten of long sparse spines, running to basal fourth, 

 simple, unbranched; four small hair-tufts beyond. Lateral comb of eighth seg- 

 ment of many spines in a triangular patch; single spine elongate, widened at 

 the tip, with an apical fringe of spinules. Anal segment longer than wide, 

 ringed by the plate; dorsal tuft of two long hairs on each side; ventral brush 

 well developed, confined to the barred area. Anal gills about as long as anal seg- 

 ment, regularly tapered. 



The larvae live in the water at the bases of the leaves of epiphytic or terrestrial 

 Bromeliaceae and in similar locations. Peryassli records the adults as taken 

 from January to June (Eio de Janeiro). 



Panama to Trinidad and Brazil. 



Fort San Felipe, Porto Bello Bay, Panama, January 3, 1908 (A. H. Jen- 

 nings) ; Caldera Island, Porto Bello Bay, Panama, January 20, 1908 (A. H. 

 Jennings) ; Trinidad (F. W. Urich) ; La Brea, Trinidad, July 8, 1905 (A. 

 Busck) ; Sao Paulo, Brazil (A. Lutz). The species is reported also from Pari 

 (Goeldi), Bahia (Bourroul), states of Eio de Janeiro and Minas Geraes, Brazil 

 (Peryassu). 



