240 MOSQUITOES OF NORTH AMERICA 



Genitalia (plate 15, fig. 108) : Side-pieces about three times as long as wide, 

 attenuated towards the base ; a rounded outer lobe bears 3 rods with hooked tips 

 and a leaf -like appendage; clasp-filament stout, curved, the tip tapering and 

 bearing a terminal claw. Harpes divided, the inner lobe stout, rounded and 

 bearing a crown of spines ; outer lobe blade-like, curved. Harpagones divided 

 into numerous lamelke, their ends forming a group of denticles inwardly. Basal 

 lobes low, broad, setose. 



Larva, Stage lY (plate 103, fig. 343). — Head rounded, widest thiough the 

 eyes, which are upon a lateral expansion ; labrum shallowly emarginate between 

 the frontal spines; antennae large, basal two-thirds rather stout, outer third 

 slender, with a multiple hair-tuft at the notch, two of the terminal hairs slightly 

 basal of the third ; upper and lower head-hairs and ante-antennal tuft multiple, 

 long. Skin glabrous. Lateral abdominal hairs multiple on first two segments, 

 in threes on third to fifth, double on sixth. Lateral comb of eighth segment of 

 many spines in a large triangular patch over three rows deep. Air-tube sub- 

 fusiform, over four times as long as wide ; pecten of short, evenly spaced teeth 

 on basal third ; four multiple hair-tufts posteriorly, rather short and subequal, 

 a double-haired tuft dorsally of the others, between second and third tufts, and 

 another between third and fourth tufts situated still more dorsally; terminal 

 hooks minute. Anal segment longer than wide, completely ringed by the plate ; 

 dorsal tuft of five unequal hairs on each side ; lateral hair single, short ; ventral 

 brush large, not extending beyond the edge of the chitinous ring. Anal gUls 

 four, slender, the upper pair slightly longer than the lower, their tips rounded. 



The larvae evidently live in semi-permanent ground-puddles in the manner of 

 the preceding allied species. Mr. Knab met with the species only once, the 

 larvae in a puddle of drainage-water in the suburbs of a city. 



Mexico. 



Orizaba, larvae in a puddle March 16, adults issued April 3 to 7, 1907 (F. 

 Knab). 



The adult is closely allied to Culex stigmatosoma, but the larvae differ 

 sufficiently. 



CULEX COKNIGEK Theobald. 



Culex corniger Theobald, Mon. Culicld.. ill, 173, 1903. 



Culex lactator Dyar & Knab, Joum. N. T. Ent. Soc, xlv, 205, 209, 1906. 



Culex hassardii Grabham, Can. Ent., xxxvlii, 167, 1906. 



Culex basilicus Dyar & Knab, Proc. Biol. Soc. Wash., xix, 169, 1906. 



Culex lactator Dyar & Knab, Proc. Biol. Soc. Wash., xix, 170, 1906. 



Culex corniger Theobald, Mon. Culicld., iv, 415, 1907. 



Trichopronomyia microannulata Theobald, Mon. Culic, iv, 481, 1907. 



Culex corniger Peryassil, Os Culicideos do Brazil, 193, 1908. 



Culex lactator Busck, Smiths. Misc. Colls., quart. Iss., lii, 68, 1908. 



Culex corniger Pazos, San. y Ben., ii, 49, 557, 1908. 



Culex lactator, var. lactator Dyar & Knab, Smiths. Misc. Colls., Quart iss.. lii. 254. 



1909. 

 Culex lactator, var. loquaculua Dyar & Knab, Smiths. Misc. Colls., quart iss., Ui, 254, 



Culex corniger Theobald, Mon. Culic, v, 342, 1910. 

 Culex lactator Theobald, Mon. Culic, v, 613, 1910. 

 Culex iasilicus Theobald, Mon. Culic, v, 613, 1910. 

 Culex corniger Lutz, Mem. Inst Osw. Cruz, iv, 78, 1912. 

 Obioinai, Descmption of CutEX cobnigeb: 



Thorax chestnut-brown, surrounded with creamy scales, which also form an in- 

 wardly projecting branch on each side to half-way across the mesonotum; abdomen 

 black, with basal white median patches forming almost bands and basal white 

 lateral spots. Wings with deep brown-scaled veins. Legs black, femora and tlbi» 

 with apical white spots; metatarsi and tarsi with apical and basal banding, most 

 prominent on the hind legs; proboscis black, with an Indistinct trace of pale banding. 



2- Head brown, covered with narrow-curved pale golden scales, ochraceous up- 



