I 



VOL. XIX, PP. 133-142 SEPTEMBER 25, 1906 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DIAGNOSES OF NEW SPECIES OF MOSQUITOES. 

 BY HARRISON G. DYAR AND FREDERICK KNAB. 



The following new species of mosquitoes have been found in 

 our study of the material collected for the Carnegie monograph 

 of the mosquitoes of North and Middle America, and prelimi 

 nary diagnoses are here given of them. In all cases where 

 more than one locality is mentioned the type locality is given 



first. 



GENUS PSOROPHORA ROBINEAU-DESVOIDY. 



Psorophora virescens sp. nov. 



Close to P. howardu Coquillett, but the abdomen above metallic green 

 shining instead of blue. The species is also somewhat smaller. 



35 specimens, Almoloya, Acapulco, Tehuantepec, Salina Cruz, Mexico; 

 Puntarenas, Costa Rica (F. Knab) ; Manzanillo, Mexico (A. Duges) ; Mon 

 terey, Mexico ( J. Goldberger). 



Type. Cat. No. 9966, U. S. Nat. Mus. 



Psorophora saeva sp. nov. 



Black with blue reflection, the legs with dense, short, outstanding scales ; 

 tips of posterior femora white. Whitish scales on sides of head and a line 

 at least on thorax, but this is denuded. Wings smoky blackish. 



3 specimens, Trinidad, B. W. I. (F. W. Urich) ; Trinidad, June (A. 

 Busck). 



Type. Cat. No. 9964, U. S. Nat. Mus. 



Psorophora iracunda sp. nov. 



Black with metallic blue luster, the legs with abundant outstanding 

 scales, long and squammose. Posterior femora slightly grayish at tip. 

 Wings smoky clouded. 



5 specimens, Puntarenas, Costa Rica (F. Knab). 



Type. Cat. No. 9905, U. S. Nat. Mus. 



GENUS CULISETA FELT. 

 Culiseta maccrackenae sp. nov. 



Proboscis black ; thorax with two brown stripes, the yestiture yellowish 

 over black. Wings with brown stains in the membrane where the scales 

 29-PROC. BIOL. Soc. WASH., VOL. XIX, 1906. (133) 



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Vf'li 



