466 MOSQUITOES OF NORTH AMERICA 



hairs long, moderately dense, brown. Coloration similar to the female. Wings 

 narrower than in the female, the stems of the fork-cells longer, vestiture about 

 the same. Abdomen compressed basally, tip expanded; setse at apices of seg- 

 ments coarser than in the female, no lateral ciliation ; the eighth segment with a 

 median dorsal patch of silvery-violaceous scales. Claw formula, 1.0-1.0-0.0. 



Length : Body about 4 mm. ; wings 4 mm. 



G-enitalia (plate 10, fig. 65) : Side-pieces over twice as long as wide, tips con- 

 ically tapered, outwardly to subapical ridges bearing ten narrow leaf-like ap- 

 pendages, a long slender peduncle below middle bearing two filaments and a 

 seta. Clasp-filament large, strongly swollen at apex, bearing a short seta and a 

 small articulated terminal spine. Harpes divided, branches at right angles, 

 equal, the outer bearing a few teeth, Harpagones nearly simple, outer portion 

 slender, bent, obscurely divided. Basal appendages small, remote, and setose. 



Larva, Stage lY (plate 113, fig. 383). Head rounded, narrowed before eyes, 

 a notch at insertion of antennae, front margin arcuate. Antenna slender, cylin- 

 drical, hardly swollen toward base, very weakly spined basally, almost smooth ; a 

 double hair before middle; four short seta and a digit at tip. Mental plate 

 elongate triangular, with a long central tooth and ten on each side, basal ones 

 rather ^videly spaced and continuing down the steep part of lateral margin to 

 base. Mandible quadrangular, outer margin oblique ; three long filaments and 

 a short one before tip ; a row of cilia from a collar ; a row of long oblique tufts 

 from short thick pedicels on outer margin ; dentition very small, of four teeth 

 on a process, the first and fourth longest ; two small teeth at base, two curved 

 serrate filaments and three feathered hairs within ; process below stout, widely 

 furcate, a row of hairs on each limb, the lower one running diagonally to base ; 

 basal angle obsolete; four long hairs within and three small ones at base. 

 Maxilla irregularly spherical, divided by a suture ; inner half with two rows of 

 stout spines with feathered tips, two rows of cilia, and a long stout process which 

 divides near base, limb again shortly divided near tip, all the ends finely cleft; 

 a row of long hairs at tip on suture; outer half with two short filaments next 

 the suture and some hairs outwardly. Palpus moderate, with four long straight 

 digits. Thorax and abdomen moderate, hairs moderately developed; lateral 

 abdominal hairs single after second segment. Trachea broad, band-shaped. 

 Air-tube conically tapered, about five times as long as wide, a black ring at the 

 base ; pecten of about twelve teeth, not reaching one-third of tube ; single spine 

 slender, fringed along one side with a uniform straight pectination of fine 

 spinules; sixteen large hair-tufts along posterior margin of tube, inserted 

 nearly in a line. Lateral comb of eighth segment of about fifteen long bar-like 

 spines in a straight row, single spines finely fringed with spinules. Anal 

 segment about as long as broad, ringed by the plate ; dorsal tuft a long hair and 

 brush on each side ; a single lateral hair ; ventral brush well developed, confined 

 to the barred area. Anal gills about twice as long as the segment, taper-pointed. 



The larvae live in the water in open bamboo- joints, Mr, Urich says that it is 

 often found associated with Orthopodomyia fascipes and occurs under the same 

 conditions. " The predominating color is brown. During life, the similarity of 

 these two larvae is marked." 



Island of Trinidad, West Indies, probably extending into Brazil. 



St. Ann's valley, Trinidad, January, 1906 (F. W. Urich). 



Genus LUTZIA Theobald. 



Lutzia Theobald, Mon. Culic, iii, 155, 1903. 

 Lutzia Lutz in Bourroul, Mosq. do Brasil, 59, 1904. 

 Taeniorhynchus Giles (in part), Journ. Trop. Med., vii, 381, 1904. 



