216 Journal New York Entomological Society, [vol. xiv. 



Culex derivator, new species. Fig. 39. 



Antennae with the tuft well outward ; upper head tuft double, very 

 long, body hairy; tracheae narrow; lateral hairs in twos after the sec- 

 ond abdominal segment. Air tube very long, 11 x 1, pecten reach- 

 ing one-third its length, the distal teeth detached ; five short tufts on 

 posterior margin. Lateral comb of the eighth segment large, of 

 long spines. 



Taken by the junior author in a puddle in a ravine at Cordoba, 

 Mexico, but not bred. 



Culex investigator, new species. Fig. 40. 



Antennae with the tuft slightly beyond the middle, dark; head 

 hairs single ; body pilose ; lateral hairs in twos after the first abdomin- 

 al segment. Air tube five-and-a-half times as long as wide, rather 

 markedly tapered on basal third ; pecten of long teeth, reaching two- 

 fifths, followed by five rather short hair tufts. 



Taken by the junior author in a pool beside the railroad track, 

 three miles from town, Santa Lucrecia, Mexico. Mr. Cocmillett 

 seems not to have named the adult although one was bred. 



Culex inhibitator, new species. Fig. 41. 



Antennae with the tuft near the outer third, dark ; upper head tuft 

 of four, short, lower long and single ; body hairy ; lateral hairs in twos 

 after the first abdominal segment; tracheae narrow. Air tube long, 

 6x1, the pecten long and reaching one-third, with five tufts, decreas- 

 ing in length a little toward tip. Anal segment long, but the gills 

 short. 



Collected by Mr. Busck in a slowly running clear cold spring in the 

 San Francisco Mts. of San Domingo. It was named " Melanoconion 

 indecorabilis Theob.' ' by Mr. Coquillett, but that was described from 

 Para, Brazil, and we do not believe it is our species. 



Culex mutator, new species. Fig. 42. 



Antennae with the tuft near the outer third, pale at base; upper 

 head tuft of three, lower single; body pilose. Air tube 5x1, tapered, 

 five or six tufts along the posterior margin, the basal one longest; 

 pecten long, but not immoderately so. 



Collected by the junior author at Cordoba, Mexico, in puddles in a 



