270 MOSQUITOES OF NORTH AMERICA 



Length : Body about 3.3 mm. ; wing 2.8 mm. 



Genitalia (plate 15, fig. 110) : Side-pieces over twice as long as wide, the tips 

 conically tapered; marginal appendages on a truncated subapieal prominence, 

 consisting of four rods with hooked tips, a leaf-like appendage, and a seta. 

 Clasp-filament stout, curved, with a small articulated terminal appendage. 

 Harpes furcate, outer half simple, curved, inner with a crown of long spines. 

 Harpagones divided. 



Larva, Stage IV (plate 97, fig. 317). — Head rounded, widest through the 

 eyes, bulging on the sides, a large notch at insertion of antennae, the front 

 margin arcuate; upper pair of head-hairs in fours, ante-antennal tuft multiple. 

 Antennae large, thick on basal two-thirds, spiued; a large tuft from a notch 

 at outer third; two long subapieal setae; a long seta, a short seta, and a 

 digit on a pedicel at tip. Mental plate triangular, straight on sides, a large cen- 

 tral tooth and eight on each side, the last one very small, the two before slightly 

 projecting. Mandible quadrangular; two filaments and a tuft of hair before 

 tip ; an outer row of ciHa from a collar; a row of rounded prominences on outer 

 margin bearing short hair-tufts ; dentition of four teeth on a process, the first 

 longest, a spine before, a small tooth and a large trifid one at base, a long, smooth 

 filament and row of feathered hairs within; process below slightly curved, 

 obscurely furcate, with a transverse and a longitudinal row of hairs and a tuft 

 at tip of each limb ; basal angle small, with a row of hairs within, two of which 

 have enlarged feathered bases ; a row of hairs at base. Maxilla elongated, coni- 

 cally pointed at tip, divided by a suture ; inner half with a row of stout hairs on 

 the margin, some of the basal ones feathered, two rows of cilia within ; a row of 

 long hairs at the tip running down along the suture; outer half with 2 fila- 

 ments below the middle and a row of small spines on margin. Palpus small, 

 rather slender, with four irregular apical digits. Thorax rounded, wider than 

 long; abdomen moderate, the anterior segments shorter; skin pilose; tracheae 

 broad; lateral hairs multiple on first abdominal segment, triple on second, 

 double on third to sixth. Air-tube long, uniformly but slightly tapered, five 

 times as long as wide ; peeten reaching to basal third ; single tooth broad, with 

 three to five branches. Lateral comb of eighth segment of many spines in a tri- 

 angular patch; single spine elongate, widened at tip, fringed with spinules. 

 Anal segment longer than wide, ringed by the plate, with a row of short spines 

 on posterior margin; dorsal tuft of three long hairs on each side; ventral brush 

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

 segment, tapered, the tips rather bluntly rounded. 



The larvae Uve in ground-pools. Mr. Busck got them in a lagoon-pool of dirty, 

 ill-smelUng water distant from habitations. 



Island of Trinidad, West Indies. 



Larvae in a lagoon-pool, June 20, 1905 (A. Busck) . 



CULEX INQXnSITOR Dyar & E&iab. 

 Culex inquisitor Dyar £ Knab, Journ. N. Y. Ent. Soc, xiv, 206, 211, 1906. 

 Obioiitai, Dbscbiption of Cttlex iNQDisrroB: 



Antennal tuft well outward, the whole member dark; head hairs in threes: 

 lateral abdominal hairs in twos after the Brst segment. Air tube five times as long 

 as wide, the peeten short and reaching nearly to the middle. Anal gills long and 

 pointed. 



Collected by Mr. Busck in a manure ditch behind a stable, Cedros, Trinidad, and 

 in pods of cocoa in " stinking black half solid water " in Dominica. The eggs are 

 laid in boats. Also obtained by the junior author in Santa Lucrecia, Mexico, and 

 Puntarenas, Costa Rica. All the adults were labeled " Culex secutor Theob." by Mr. 

 CoqulUett. 



