130 ilOSQUITOES OP NORTH AMERICA 



cylindrical, apical portion expanded, claspers prominent, last segment with a 

 marginal series of coarse yellowish-brown bristles. Wings narrower than in the 

 female, venation and vestiture about the same. Middle tibiae and tarsi bright 

 brassy beneath ; front and hind tibiae and tarsi bright bronzy beneath, hind tarsi 

 with the last two joints silvery white beneath. Tarsal claws equal and simple; 

 formula, 0.0-0.0-0.0. 



Genitalia (plate 6, fig. 35) : Side-pieces about twice as long as wide, sharply 

 tapered, with a long seta on outer side, smooth. Clasp-filament stout, much 

 attenuated beyond the middle, with a very stout terminal claw; subapically 

 on outer side is a thick appendage bearing a few hairs at its base, furcate, each 

 fringed with short, thick spines. Basal lobes long, slenderly conical, resembling 

 the side^pieees in miniature, a long, slender filament at tip which widens to a 

 roundedly triangular apex, from the inner angle of which is an elliptical 

 appendage with subdivided tip. Harpes elliptical, small, the tip thickened 

 and bent outward in the form of a stout spine. Harpagones forming a basal 

 cone with central point, unci forming a similar smaller cone. Basal appen- 

 dages represented by a row of elliptical scales on each side. 



Larva, Stage IV (plate 91, fig. 290). — Head subquadrate, anterior margin 

 rounded, with distinct angles behind the eyes ; antennae small, uniform, with a 

 minute single hair near tip; both upper and lower pairs of dorsal head-hairs 

 single; ante-antennal tuft in threes. Lateral hairs of abdomen in fours on 

 third and fourth segments, in threes on fifth, single on sixth. Air-tube rather 

 short, tapering on outer half, over three times as long as wide, the terminal 

 hooks small; four long single hairs on the dorsal aspect, one below near the 

 base, followed by three short spines like false pecten teeth, beyond which are 

 two single short hairs. Lateral comb of eighth segment of about 23 short spines 

 in two partly overlapping rows, the hair behind single. Anal segment longer 

 than wide, with a large dorsal plate strongly spined along its posterior margin; 

 dorsal tuft of four unequal hairs on each side ; lateral tuft of two long hairs from 

 the angle of the plate ; subventral tufts small, multiple. Anal gills large, long, 

 equal, over twice as long as the segment, the tips broadly rounded. 



The lai'vae live in the water in the flower-cups of species of Heliconia of the 

 type of H. acuminata. In one instance Mr. Busck found them associated with 

 Lesticocampa culicivora. Mr. Busck says : 



" The very specialized larvae of this species live in the conspicuous red flower- 

 sheaths of a Bihai {Heliconia) . . . These flower-sheaths contain but little 

 water and that of a slimy character, but they harbor a number of dipterous 

 and coleopterous insects. The . . . larvae of the present species are slender, 

 flattened, strongly segmented, with yellow head, short tube, and long anal 

 appendages ; they have the ability to move head foremost, more crawling than 

 swimming through the sometimes thick fluid in which they live; they are 

 even able to crawl head first up the sides of the calyx above the flxiid, and 

 undoubtedly seek another lower and wetter flower-sheath in this way, if for 

 some reason the sheath in which they are goes dry. . . . The eggs, which are 

 black, smooth, and elliptical, are laid singly, but in large numbers, in the 

 uppermost, just opening, and yet dry flower-sheath, where they await a rain 

 for their development." 



Panama. 



Tabernilla, Canal Zone, April 28, 1907 (A. Busck) ; Tabemilla, Canal Zone, 

 May 2, 1907, bred from a larva in water in the prints of horse's feet with Urano- 

 tcema calosomata (A. Busck) ; Tabernilla, Canal Zone, larvs in flower-cup of 

 plantain-like plant {= Heliconia), small receptacles with thick, sticky water, 

 May 14, 1905 (A. Busck) ; Gorgona, Canal Zone, larva from " banana bromelia " 

 ( = Heliconia), February 7, 1908, and from banana-like plants, " cup on flower- 



