CULEX TERRITANS 295 



shorter and three times its length distant. Halteres light, a few brown scales on the 

 distal parts of stem. 



Length, 4 mm. Habitat, Fort Snelling, Minn. Taken Oct. 1. 



Collected and sent by Major E. B. Frick, Surg. U. S. Army, after whom it is named. 



It lies very near territans, but differs in general colouring, in the " frosty " sub- 

 median lines on the mesonotum, the light scales around the " bare space," light scales 

 on the scutellum, the much better developed apical abdominal bands, white bases and 

 venter of femora, and the minute spot at apex of tibia. 



Descbiption of Female, Male, Larva, > nd Pupa of Culex tebbitans : 



Female. Prcboscis moderate, subeylindrical, labellse conically tapered ; vesti- 

 tiire of brownish-black scales. Palpi short, one-fifth as long- as proboscis, slender, 

 black, with a few outstanding setae. Antennae with joints subequal, rugose, 

 pilose, black, second joint pale at base; tori subspherical, with a cup-shaped 

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

 Clypeus rounded triangular, doubly excavated at base, blackish brown, nude. 

 Occiput brown, clothed with narrow, curved, yellowish white scales, more 

 whitish along margins of eyes and lower parts of sides, a black spot on each side, 

 many erect, forked pale-brown scales on nape ; a row of bristles along the ocular 

 margins. 



Prothoracic lobes elliptical, remote dorsally, with whitish vestiture and brown 

 bristles. Mesonotum dark brown, with two narrow, impressed, darker lines; 

 vestiture of narrow, curved pale-brown scales and rows of dark setae, a lighter 

 area about the ante-scutellar space and around the margins, a pair of yellowish 

 subdorsal spots on disk. Scutellum trilobate, brown, clothed with narrow, 

 minute curved, pale scales, each lobe with, a tuft of brown bristles. Postnotum 

 with a dorsal carina, elliptical, prominent, luteous, nude. Pleurae and coxae 

 brownish, with patches of elliptical, flat white scales and rows of pale bristles. 



Abdomen subeylindrical, truncated at tip ; dorsal vestiture black, with a faint 

 bluish reflection, a moderately broad soiled white band at apex of each segment 

 except the first, widening on sides ; venter whitish scaled, a dark membrane show- 

 ing at incisions. 



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

 as its cell, that of second posterior cell slightly shorter than its cell ; basal cross- 

 vein more than its own length distant from anterior cross-vein ; scales brownish 

 black, the outstanding ones long, dense, and broadly linear. Halteres whitish, 

 with darker knobs. 



Legs moderate ; tibiae white at base and beneath nearly to tips ; vestiture other- 

 wise black, with a blue reflection above and a brassy one beneath; knees nar- 

 rowlv whitish ; base of first tarsal joint narrowly whitish. Claw formula, 

 0.0-0.0-0.0. 



Length : Body about 3.5 mm. ; wing 4 mm. 



31ale. Proboscis straight, slightly enlarged at apex. Palpi exceeding pro- 

 boscis by nearly the length of the last two joints, which are slightly thickened 

 and, with end of long joint, bear many long black hairs; vestiture brownish, 

 bases of last two joints pale. Antennas plumose ; last two joints long and slender, 

 rugose, pilose, black, the others short, whitish, broadly ringed with black at 

 insertions of hair- whorls ; hairs long, brown. Coloration similar to the female. 

 Wings narrower than in female, the stems of the fork-cells longer, vestiture 

 sparser. Abdomen long, subeylindrical and slender on basal half, depressed and 

 broadened apieally ; lateral ciliation long and dense, rather coarse, pale brown. 

 Claw formula, 1.1-1.1-0.0. 



Length : Body about 4.5 mm. ; wing 3.5 mm. 



Genitalia (plate 13, fig. 94) : Side-pieces more than twice as long as wide, 

 tapered outwardly ; marginal appendages on a slight subapical prominence from 

 which a serrated membrane runs to tip ; appendages consisting of two capitate 



