Dec, iqo6.] Dvar and Knar: Larvae of CuuciD^e. 223 



Mr. Coquillett's results, especially in the genus Culex, have produced 

 in our minds a feeling of most profound distrust, and we are not pre- 

 pared to accept anything that he says without corroboratory evidence . 



Genus MOCHLOSTYRAX, new. 



Differs from Culex in the structure of the comb of the eighth seg- 

 ment, which consists of a single row of bars instead of a patch of 

 scales. We had thought to call this genus Melanoconion Theob., 

 but the type species of that genus is atratus Theob., of which the lar- 

 va has been made known by Dr. Grabham (in Theobald, Mon. Culic, 

 iii, 238, 1903 and Can. ent., xxxvii, 404, 1905) In neither place is 

 the structure of the comb accurately stated, but it is said to consist 

 of "numerous flattened elongate scales bordered with fine setae.' ' It 

 is clear that no one would so describe a row of bars, and the species 

 atratus must be referred as a typical Culex of that group that has a 

 very long slender tube. Type, M. caudelli, new species. 



Table of species. 



1. Antennae with the tuft at the middle, slight; tube with 15 hair tufts alon^ 



the posterior line urichii 



Antennee with the tuft from a notch beyond the middle 2 



2. Air tube over four times as long as wide, slender, scarcely tapered, with 



slight terminal setae 3 



Air tube not over four times as long as wide, stout at base and taper- 

 ing, slightly curved forward with two stout hooks at tip 4 



3. Bars of comb in a perfectly regular row, body glabrous melanurus 



Bars of comb in an irregular row, body pilose erraticus 



4. Bars of comb in a curved row; body pilose pilosus 



Bars of comb in a straight row; body glabrous 5 



5. Comb of sixteen bars caudelli 



Comb of only eight bars cubensis 



Mochlostyrax urichii Coquillett. Fig. 60. 



Melanoconion urichii Coquillett, Can. ent., xxxviii, 61, 1906. 



We have the larvae from Mr. Urich from Trinidad, who says: 

 "Often found associated with Mansonia faci pes and occurring under 

 the same conditions. Predominating color brown. During life the 

 similarity of the two larvae is marked.' ' 



Mochlostyrax melanurus Coquillett. 



Culex melanurus Coquillett, Journ. N. Y. ent. soc, x., 193, 1902. 

 Culex melanurus Dyar, Journ., N. Y, ent. soc, x, 196, 1902. 



