OF WASHINGTON, VOLUME XI, 1909 39 



Central American form has departed widely enough from the 

 common stock to deserve specific distinction. Culex similis, 

 therefore, exists in the Antilles, gives rise to a race, lachriinans, 

 in the Guianas, and develops a separate, but closely allied 

 species, proximus, in Central America. This is a parallel 

 development to that of Citle.r quinquefasciatus, referred to 

 above, with its race in the arid regions of North America, 

 developing a separate species upon the Pacific coast. 



We have before us, besides the forgoing, several other 

 species of the salinarins group, but of which we either do not 

 possess males or they are so obviously distinct in markings 

 that we do not consider it necessary to go further with them in 

 this connection. 



EXPLANATION OF PLATES I TO III. 



Figures of the basal parts (harpes and harpagones) of the male 

 genitalia of certain species of Culex. 



1. Culex quinquefasciatus Say, Iloilo, P. I. (G. W. McCoy). 



2. Culex comitatus Dyar and Knab, Los Angeles, Cal. (Dyar and 

 Caudell). 



3. Culex quinquefasciatus variety dipseticus Dyar and Knab, Salina 

 Cruz, Mex. (A. Duges). 



4. Culex pipiens Linnaeus, Urbana, 111. (F. Knab). 



5. Culex restuans Theobald, West Springfield, Mass. (F. Knab). 



6. Culex proximus Dyar and Knab, Taboga I., Panama (A. H. 

 Jennings). 



7. Culex salinarius Coquillett, Chesapeake Beach, Md. (H. G. Dyar). 



8. Culex similis Theobald, Santo Domingo, W. I. (A. Busck). 



9. Culex similis variety lachrimans Dyar and Knab, Georgetown, 

 British Guiana (E. D. Rowland). 



DESCRIPTION OF A NEW MOSQUITO FROM CUBA. 



[Diptera, Culicidae.] 

 BY HARRISON G. DYAR and FREDERICK KNAB. 



Culex ignobilis, new species. 



Proboscis and legs without pale rings ; proboscis swollen toward 

 the tip : abdomen without dorsal pale bands, dull blackish, lateral spots 

 yellowish white, basally situated on the segments ; venter pale-scaled, 

 with indistinct dark bands toward the tip. Occiput with pale scales and 

 erect black forked ones. Scales of the wings broad, many obliquely 

 subtruncate. 



Four specimens, San Antonio de los Bafios, Cuba (J. H. 

 Pazos). 



7 v/>r No. 12239, U. S. Nat. Mus. 



