412 MOSQUITOES OF NORTH AMERICA 



Antennae large, slightly curved, thick and well spined. on basal two-thirds, a 

 large tuft from a notch ; two long subapical setae, a long seta, a short one and a 

 digit at tip. Upper pair of dorsal head-hairs double and small, lower pair 

 single and long, ante-antennal tuft multiple. Mental plate small, triangular, 

 with a large central tooth and six on each side, basal ones more remotely spaced. 

 Mandible quadrangular, with a few small hairs near base ; two filaments and a 

 tuft of hairs before tip; an outer row of cilia from a collar; a row of transverse 

 rounded prominences considerably within outer margin, each bearing a long 

 fine hair and tuft of small ones; dentition of three teeth on a process and a 

 group of spines below; a spine before, a long smooth filament, a short slender 

 one and row of feathered hairs within ; process below irregular on front margin, 

 obscurely furcate, with a row of hairs and tuft at tip ; basal angle small, with a 

 row of stout hairs within; a row of hairs at base. Maxilla elongate, rather 

 bluntly rounded at tip, divided by a suture ; inner half with long spines along 

 margin, some short ones within and a curved row of fine hairs at base ; a row of 

 long hairs at tip, running down along the suture ; outer half with two filaments 

 below middle and a patch of hair before. Palpus short, not longer than broad, 

 with long, slender apical digits, longer than palpus. Thorax rounded, wider 

 than long. Abdomen moderate, the anterior segments shorter; lateral hairs in 

 threes on first segment, in twos on second, in threes on third to sixth; skin 

 pilose. Air-tube elongate, gradually tapered, over five times as long as wide; 

 pecten reaching about one-third, single teeth serrate along one side ; five tufts 

 along the posterior margin beyond pecten, becoming shorter outwardly. 

 Lateral comb of eighth segment of many spines in a triangular patch; single 

 spine elongate, widened outwardly, with an apical fringe of spinules. Anal 

 segment longer than wide, ringed by the plate ; dorsal tuft of two long and two 

 short hairs on each side; ventral brush well developed, confined to the barred 

 area. Anal gills as long as the segment or longer, tapered on outer half. 



The larvae live in pools and the edges of streams, where protected by vege- 

 tation. 



Mr. Knab collected the larvae in a large pot-hole beside a stream, with clear 

 water and dead leaves, and in a puddle in a wagon track in a shaded place ; Mr. 

 Busck got them in the edges of a slowly running stream among grass ; Mr. 

 Jennings got them in a swamp back of a dump, from the margin of a river 

 running rapidly, in a reservoir, from a pool, from a stream, from a pond, and 

 from small lagoons at the edge of a beach. 



Southern Mexico and Central America. 



Almoloya, State of Oaxaca, Mexico, July 21, 1905 (F. Knab) ; Sonsonate, 

 Salvador, August 20, 1905 (F, Knab) ; Pedro Miguel, Canal Zone, Panama, 

 April 24, 1907 (A. Busck) ; Pedro Miguel, Canal Zone, Panama, December 7, 



1907 (A. H. Jennings) ; Miraflores, Canal Zone, Panama, December 10, 1907 

 (A. H. Jennings) ; Kio Grande, Canal Zone, Panama, December 14, 1907 (A. 

 H. Jennings) ; Las Cascadas, Canal Zone, Panama, December 27, 1907 (A. H. 

 Jennings) ; Caldera Island, Porto Bello Bay, Panama, January 3, 1908, Febru- 

 ary 12, 1909 (A. H. Jennings) ; Tabernilla, Canal Zone, Panama, December 15, 



1908 (L. Espey). 



CULEX CARCINOPHILUS Dyar & Knab. 



Culex carcinophilus Dyar & Knab, Journ. N. Y. Ent. Soc, xiv, 207, 220, 1906. 

 Original Description of Culex carcinophilus : 



Antennas with the tuft beyond the middle, dark; upper head tuft multiple, lower 

 single; body spicular, not pilose; lateral hairs in twos on the second abdominal seg- 

 ment, in threes on the third to sixth. Air tube very long, 10 X 1, straight; four 

 small, two-haired tufts on posterior margin; pecten of long spines outwardly, reach- 

 ing to one-sixth. Lateral comb of the eighth segment large; anal gills very small. 



Collected by Mr. Busck from crab holes containing fresh water near San Domingo 

 City. The adults were named " Melanoconion atratus Theob." 



