CULEX EXTRICATOR 325 



Dr. Pazos described this species under oiir determination, but his description 

 happened to appear first, so that it is necessary to credit him with the author- 

 ship of the name. 



CULEX EXTRICATOR Dyar & Knab. 



CuJex extricator Dyar & Knab. Journ. N. Y. Ent. Soc, xiv, 206, 211, 1906. 

 Culex extricator Busck, Smiths. Misc. Colls., quart, iss., lii, 68, 1908. 

 Culex extricator Knab, Science, n. s., xxxi, 868, 1910. 



Original Desceiption of Culex extricator: 



The antenna! tuft arises near the middle, but has a distinct notch; the head hairs 

 are in threes or fours: air tube much tapered on outer half, the tufts weak; body- 

 shortly hairy, the spicules not much elongated. The lateral hairs are in twos after 

 the second abdominal segment. Lateral comb of the eighth segment well developed. 

 Anal gills bluntly rounded. 



Collected by Mr. Busck in a bucket used to keep live crabs at Cedros, Trinidad. 

 The adults were named " Culex pipiens L." by Mr. Coquillett. 



The following is an abstract of the table : 



1. Antennae with the tuft outwardly placed, the part beyond slender. . 5 



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



7. Anal appendages four, normal 8 



8. Air tube with three paired tufts posteriorly outwardly, the middle 



one moved laterad out of line, usually situated near or not 

 much beyond the middle of the tube 9 



9. Body spicular or pilose 10 



10. Dislocated tuft of tube not, or scarcely beyond the middle 11 



11. Anal processes broad and bluntly rounded 12 



12. Air tube subfusiform, tapered on outer half; body spicular. extricator 



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



Female. Proboscis moderate, subcylindrical, slightly expanded at tip, labellse 

 conically tapered; vestiture black with bronzy and blue luster; setae minute, 

 curved black, those on labellse more prominently outstanding. Palpi short, one- 

 fifth as long as proboscis, slender, black with a bluish reflection, with a few out- 

 standing setfe. Antennae with basal joint somewhat shorter than apical ones, 

 rugose, densely pilose, dark brown; tori subspherical with cup-shaped apical 

 excavation, luteous, black within ; hairs of the whorls sparse, moderate, black. 

 Clypeus roundedly triangular, doubly excavated at base, pale brown, nude. 

 Eyes black. Occiput brown with narrow, curved, lustrous pale-brown scales, 

 narrowly whitish along margins of eyes and flat ones on lower part of sides, 

 many erect, forked black scales on vertex; a row of black bristles along margins 

 of eyes. 



Prothoracic lobes elliptical, remote dorsally, brown, the vestiture of pale 

 scales and brown bristles. Mesonotum light brown, with two dorsal impressed 

 bare concolorous lines; vestiture of narrow, curved, lustrous reddish-broAvn 

 scales and rows of coarse dark bristles. Scutellum trilobate, pale brown, clothed 

 with narrow, curved pale scales, each lobe with a tuft of coarse brown bristles. 

 Postnotum elliptical, prominent, brown, nude. Pleurae luteous brown, coxae 

 greenish luteous with patches of white scales and rows of pale bristles. 



Abdomen subcylindrical, truncated at tip ; dorsal vestiture dark brown with 

 a blue-black reflection ; last segment with a narrow white, basal band ; a row of 

 pale bristles at tip of each segment; a row of small lateral basal segmental 

 whitish triangular patches becoming large on apical segments; venter dirty- 

 white scaled with black, somewhat angular, bands at tips of last three segments. 



Wings moderate, hyaline ; petiole of second marginal cell one-third as long as 

 its cell, that of second posterior cell nearly as long as its cell ; basal cross-vein 

 nearly twice its own length distant from the anterior cross- vein; scales brown 



