SOME NEW AMERICAN MOSQUITOES 75 



the thoracic hairs are very long ; lateral hairs on the first and second ab- 

 dominal segment in threes, on fourth and fifth in twos. Comb of the 

 eighth abdominal segment with four partially incomplete rows of spines. 

 The main hair tuft of this segment consists of about I I stout ciliated hairs, 

 a fine very long hair originating near its base ventrally ; a double hair 

 even farther ventrally at a somewhat greater distance. Near the dorsal 

 margin of the comb we find another fine long hair and a very short tuft 

 of four extremely fine hairs. Integument smooth. The anal segment is 

 ringed and contains two times five tufts in the brush. Gills rather short 

 and wide, the distal ones distinctly larger than the proximal ones, about 

 half as long as the last hair tuft of he brush. Near base of the larger 

 gill a long fine hair, originating in a deep sinus of the ring, two very long 

 terminal hairs present in my specimen ; but as there are four papillae of 

 which only two bear hairs, though a third shows a short broken stump, 

 I do not doubt that there were originally four hairs present. 



The air tube is very long, 2 mm., or about as long as the abdomen ; 

 0.2 mm. at base, 0.1 mm. at apex. The pecten consists of 1 3 or 14 

 strong well-separated teeth and has a length of about 0.4 mm., or one- 

 sixth of that of the tube ; otherwise the tube appears smooth at first view ; 

 nevertheless it bears five pairs of rather fine hairs, of which none are 

 considerably out of line. The drawing gives their exact position. Follow- 

 ing the determination table of H. D. & K., we run the form out : 1 -2 

 - 3 - 8 - II - 1 2 - 29 - 30 - 46. Here by the simplicity of the air 

 tube haiirs our form is separated from No. 47 containing the foUov^ang 

 species: consolator, rejector, jenningsi, imitator, ocellatus; under 50 

 inimitahilis differs in its air tube pecten consisting of no more than five 

 teeth ; corrigani by the simple lateral hairs on abdominal segments 3—5 ; 

 restridor has only four peured hzurs on the tube and latisquama and 

 conservator not more than one. Nevertheless there can be no doubt 

 that our larva comes very close to many forms here included, among 

 others to ocellatus, latisquama, and conservator, with which also the 

 characters of the adult chalcocorystes are in accord. 



It should be stated that in the males of all three forms mentioned 

 the palpi are shortened. This is not very obvious in ocellatus, where, 

 however, the palpi do not atteun the length of the proboscis, but are about 

 three-fourths as long. In latisquama the length is about half, in conser- 

 vator they are even less, very short, as in our form. The presence of a 



