152 MOSQUITOES OP NORTH AMEKICA 



broader on last four tarsal joints ; mid legs with femora and tibiae and basal half 

 of first tarsal joint yellowish silvery beneath, outer half of first tarsal joint and 

 basal third of second ringed with blackish brown, apical two-thirds of second 

 and all of the succeeding joints silvery white all around. Claws on mid tarsi 

 large, unequal, the longer one more strongly curved, those of hind tarsi small, 

 subequal; formula, 0.0-0.0-0.0. 



Length : Body about 3 mm. ; wing 3.5 mm. 



Genitalia (plate 6, fig. 37) : Side-pieces more than three times as long as 

 wide, basal third quadrate, its outer angle produced into a long curved projec- 

 tion covered with hairs and twice as long as basal part, from inner base of which 

 the rudiment of the clasp-filament arises ; a row of long, very broad hairs within 

 near tip of trunk of side-piece. Clasp-filament small, attenuated in the middle, 

 the tip angularly expanded. Harpes, harpagones, and unci with their tips ap- 

 proximated, forming a series of basal cones. Basal appendages represented by 

 three stout setae on each side. 



Larva, Stage IV (plate 92, fig. 398). — Head rounded, the front somewhat 

 pointed, forming an angle behind the insertion of antennae, and another pos- 

 teriorly at edge of occipital foramen ; antennae rather long, as long as half the 

 length of head, slightly curved, and bearing a small tuft beyond the middle; 

 head-hairs ample, approximated tufts ; ante-antennal tuft distant from antennal 

 base, multiple, the other tufts long, multiple, conspicuous, rendering the head 

 unusually hairy. Lateral abdominal hairs in twos after the second segment. 

 Comb of eighth segment of many spines in a large patch, about three rows deep, 

 followed by a five-haired tuft. Air-tube long, tapering strongly on basal third, 

 outer portion attenuated and slightly curved forward, becoming uniform in 

 width toward tip ; a row of single hairs on dorsal aspect ; a similar row on ventral 

 aspect, replaced toward base by a three-haired tuft; a false peeten of six long 

 teeth, single, situated on ventral line before middle of tube; tube about eight 

 times as long as basal width. Anal segment longer than wide, with a large 

 dorsal plate; dorsal tuft of four hairs on each side; lateral tuft long, double; 

 subventral tuft short, stellate. Anal giUs long, about twice as long as the seg- 

 ment, somewhat potated at tips. 



Pupa (plate 148, fig. 699). — Cephalothoracic mass large, pyriform; two 

 pairs of long single hairs anteriorly, just above eyes; air-tubes very long and 

 very slender, about as long as cephalothorax, hardly expanded at tip. Abdomen 

 depressed, moderately long; stellate tufts of first segment well developed; 

 second to sixth segments with series of very long dorsal hairs; seventh and 

 eighth segments with moderate fan-shaped tiifts. Anal paddles small. 



The larvae live in water between the leaves of epiphytic Bromeliaceae. Mr. 

 Busck found them associated with Wyeomyia philophone, Wyeomyia leucopisthe- 

 pus, Gulex jenningsi, and MegarJiinus superbus; Mr. Jennings also obtained 

 them several times, once associated with Wyeomyia simmsi and once with 

 Orthopodomyia phyllozoa. 



Panama. 



Boqueron Eiver, May 33, 1907, larvae in bromelias (A. Busck) ; TabemUla, 

 Canal Zone, July 10, 1907, an adult issued August 20, larvae in true bromelia- 

 water (A. Busck) ; Fort San Felipe, Porto Bello, January 4, 1908, and January 

 31, 1908, larvae in bromelia-water (A. H. Jennings) ; Caldera Island, Porto 

 BeUo Bay, January 20, 1908, larvae from a bromelia (Tillandsia) taken at the 

 edge of the mangrove swamp on the mainland side of the island (A. H. Jen- 

 nings) ; Porto Bello, February 16, 1909, larvre from Tillandsia (A. H. Jen- 

 nings) ; Cascajal Eiver, February 18, 1909, larvae from bromelias overhanging a 

 branch of the stream (A. H. Jennings) ; Upper Pequini Eiver, March 25, 1909, 

 from bromelias on a tree at Survey Camp Fo. 3 (A. H. Jennings) ; Alhajuela, 



