CULEX FACTOR 371 



Los Anijeles, June, 1906 (H. G. Dvar) ; San Pedro, July 10, 1901 (T. D. A. 

 Cockrell) ; San Luis Obispo, June^27, 1906 (A. X. Caudell) ; Stanford Uni- 

 versity, June 28, 1903 (I. McCracken). 



So far as we know, this species is confined to the coast of California. It does 

 not occur in the interior, specimens collected at Indio and Coachella, California, 

 being CuJex quinquefasciatus. It is allied to that species, yet approaches the 

 European Culex pipiens in coloration. 



CULEX FACTOR Dyar & Knab. 



Culex factor Dyar <& Knab. Journ. N. Y. Ent. Soc, xiv, 206, 212, 1906. 

 Ciilex factor Dyar & Knab, Proc. Ent. Soc. Wash., xi, 37, 1909. 



Original Description of Culex factor: 



Antennal tuft beyond the middle, the member pale on the basal half. Head hairs 

 in threes; body pilose; tracheal tubes broader than in coronator. Lateral hairs in 

 twos after the second abdominal segment. Subdorsal hairs very long and in twos on 

 segments 4 to 7. Air tube long, 6X1, the pecten reaching to one-third. 



Collected by the junior author at Santa Lucrecia, Rincon Antonio, Tehuantepec 

 and Salina Cruz, Mexico, and labeled ''Culex ? secutor Theob." by Mr. Coquillett. 

 Others were taken at St. Vincent, Barbadoes and Martinique by Mr. Busck and 

 labelled " Cnlex salinarius Coq." by the author of that species; but these specimens 

 of Mr. Busck we refer here more doubtfully, as their condition is so poor that we 

 cannot be certain of them. Mr. Busck's material was all taken out and handled by 

 Mr. Coquillett before our final examination, which extra handling was far from 

 beneficial to the skins. 



The following is an abstract of the table : 



1. Antennfe with tuft outv/ardly placed, part beyond slender 5 



5. Air-tube four times as long as wide or over 7 



7. Anal appendages four, normal 8 



S. Air tube with four paired tufts posteriorly outwardly (sometimes 

 increased by additional ones basally), the subapical one 

 moved laterad out of line, usually situated at the outer third 

 of the tube 14 



14. Air tube long, over 5X1, the sides nearly straight without marked 



tapering 15 



15. Body spicular-pilose 16 



16. Air tube 6X1, tufts 2-haired and long; antennae pale at base. . factor 



Description of Female, Male, and Larva of Culex factor: 



Female. Proboscis moderate, rather stout, slightly expanded at tip, labell^e 

 conically tapered; vestiture brown, \vith a whitish broad shade in middle be- 

 neath, darker towards tip; setse minute, curved, black, those on labellse more 

 prominently outstanding. Palpi short, about one-fifth the length of proboscis, 

 uniform, clothed with blackish scales, setas at base long and outstanding. An- 

 tennae moderate, joints subequal, rugose, pilose, blackish, second joint scarcely 

 enlarged ; tori subspherical with a cup-shaped apical excavation, yellowish shad- 

 ing to dark brown on inner side. Clypeus rounded triangular, convex, brownish 

 black, nude, slightly pruinose. Eyes black. Occiput pale brown, clothed \\ath 

 narrow, curved scales, flat ones on lower part of sides, yellowish white on vertex, 

 white along margins of eyes and lower part of sides, numerous erect, forked black 

 scales on vertex densest at sides. 



Prothoracic lobes elliptical, remote dorsally, brown, clothed with a few narrow 

 pale scales and brown bristles. Mesonotum brown with two narrow, impressed, 

 dorsal bare lines, clothed with narrow, curved pale-bronzy scales, paler around 

 ante-scutellar space, and numerous brown bristles. Scutellum trilobate, luteous, 

 clothed with narrow pale scales, each lobe with a tuft of brown bristles. Post- 

 notoum elliptical, yellowish brown, nude. Pleurge and coxse greenish luteous, 

 clothed vnih patches of flat white scales and rows of brown bristles. 



Abdomen subcylindrical, depressed, truncate at tip, clothed dorsally with 

 blackish scales, which have a bronzy-bluish metallic reflection, each segment but 



