CULEX DELYS 317 



tufts, the basal one beyond end of peeten, the subapical one moved laterally out 

 of line. Anal segment longer than wide, ringed by plate ; dorsal tuft of three 

 hairs of different lengths on each side ; ventral brush confined by the chitinous 

 ring. Anal gills small, about half as long as the segment, tips bluntly pointed, 

 all four of nearly equal length. 



The larvas live in sloughs of permanent water which are filled by tall reeds, 

 the water containing also aquatic plants and fish. Dr. Dyar found them several 

 times in such situations and Mr. Caudell found them in a similar location. The 

 adults do not come out of the reeds covering the sloughs, but a person entering 

 among the reeds will be quickly bitten. It is probable that the mosquitoes feed 

 normally upon the birds that frequent these reeds in large numbers. The larvse 

 are translucent and remain quietly among the Lemna and other aquatic vege- 

 tation, thus escaping the observation of the fish that frequent the water. 



Southern California. 



San Onofre, June 27, 1906 (H. G. Dyar) ; Nigger Slough, Gardena, May 30, 

 1906 (H. G. Dyar) ; Sweetwater Junction, June 2, 1906 (Dvar & Caudell) ; 

 Guadaloupe, June 25, 1906 (A. N. Caudell) ; Salinas, July, 1906 (H. G. Dyar). 



CULEX DELYS, new species. 

 Description of Female of Culex delys (Male and Larva Unknown) : 



Female. Proboscis rather long and slender, scarcely expanded toward tip, 

 labella? conically tapered ; vestiture black, paler beneath, labellse pale, Avith small 

 outstanding setfB. Palpi short, one-sixth as long as proboscis, blackish brown. 

 Antenna rather long, the second Joint half as long again as third, remainder of 

 joints subequal, rugose, pilose, black ; hairs of the whorls moderate, black ; tori 

 subspherical, with a cup-shaped apical excavation, luteous brown, darker on 

 inner side. Clypeus rounded triangular, blackish, nude. Eyes black. Occiput 

 black, clothed with narrow, curved scales, pale brown above, white below with 

 numerous erect, forked light brown ones on nape, margins of eyes whitish scaled ; 

 a row of coarse brown bristles along margins of eyes. 



Prothoracic lobes elliptical, remote dorsally, brown, clothed with pale scales 

 and dark bristles. Mesonotum dark brown, vestiture of narrow, curved pale 

 golden-brown scales with a slight bronzy luster, and stiff brown bristles. Scu- 

 tellum trilobate with vestiture similar to that of mesonotum but paler, each lobe 

 with a tuft of dark brown bristles. Postnotum elliptical, prominent, luteous 

 brown, nude. Pleurae brown, coxge luteous, with patches of white scales and rows 

 of brown bristles. 



Abdomen subcylindrical, depressed, truncate at tip ; dorsal vestiture of dull 

 black scales, a row of lateral, basal, segmental, white, triangular patches ; venter 

 with segments black, white banded basally, tip with numerous bristles. 



Wings moderate, hyaline; petiole of second marginal cell very short, about 

 one-eighth as long as its cell, that of second posterior cell shorter than its cell ; 

 basal cross-vein distant more than its own length from anterior cross-vein ; out- 

 standing scales of veins narrowly ovate, denser and broader on forks of second 

 vein, brown, with a blue reflection on costa. 



Legs moderate, femora whitish beneath ; tibiae and tarsi black with a slight 

 bronzy reflection, paler beneath, knees and tips of tibiae whitish. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 3 mm. ; wing 3 mm. 



Type : No. 12706, U. S. Nat. Mus. 



Mr. Jennings bred the unique type from a larva in a swampy pond in bamboo 

 woods but preserved no larval skin. 



Panama. 



Tabernilla, Canal Zone, December 15, 1908 (A. H. Jennings). 



