232 MOSQUITOES OF NORTH AMERICA 



f^. Palpi brown, the last two joints nearly as long as the ante-penultimate, the 

 penultimate slightly shorter than the apical; the last two joints with long brown 

 hairs on each side, also on one side of the apex of ante-penultimate joint; there is a 

 narrow pale band at the base of the last two joints and also near the base of the 

 long ante-penultimate joint; proboscis black, with a narrow white band on the base 

 of the apical half; antennae banded black and white, with flaxen plume-hairs. The 

 head with more gray scales than in the $. Thorax and abdomen as in the $. Legs 

 as in the $; ungues of the fore and mid legs unequal, both uniserrated, on the hind 

 legs equal and simple. Wings narrow; the fork-cells short; the first submarginal 

 longer and narrower than the second posterior, its stem more than half the length 

 of the cell; stem of the second posterior as long as the cell; posterior cross-vein about 

 its own length distant from the mid cross-vein. 



Length. 5 to 5.5 mm. 



Habitat. Stanford University, California. 



Time of Capture. September and October. 



Observations. Described from a series of 5 $s and 4 ^^s sent me by Professor Kel- 

 logg. It is a very marked species, but presents at first sight a resemblance to Culex 

 taniorhynchus, Wiedemann. It differs however, in (1) having the legs apically and 

 basally pale banded, (2) in their being marked with lines or lines of spots, and (3) 

 in the simple, not uniserrated, ungues in the $ (4), in the structure of the c^ palpi, 

 etc. Moreover, a hasty examination will show that this species is not nearly so 

 compactly built as in twniorhynchus. The specimens show some variation, both in 

 regard to the thoracic adornment and in the leg ornamentation. One 5 has no signs 

 of the two small pale thoracic spots, and the last hind tarsal in one appears almost 

 white, and in others the median dark band is very broad, making the tarsal segment 

 almost all dark coloured. 



Desckiption of Female, Male, and Larva of Culex tabsalis : 



Female. Proboscis moderate, subcylindrical, uniform, labellfe conically 

 tapered; vestiture black, a sharply limited white band before the middle; setse 

 minute, curved, black, those on labellse more prominently outstanding. Palpi 

 small, one-fifth the length of proboscis, black, with small white tips. Antennae 

 with the joints subequal, rugose, pilose, black, the second joint slightly enlarged, 

 with a patch of white scales on inner side ; tori subspherical, with a cup-shaped 

 apical excavation, yellowish, shading to black within, with a patch of white scales 

 on inner side ; hairs of whorls sparse, moderate, black. Clypeus rounded tri- 

 angular, prominent, with a slight median groove, dull black, nude. Eyes black. 

 Occiput black, clothed with narrow curved scales which are mostly white, dis- 

 tinctly so along margins of eyes, but brownish in a large patch each side of the 

 middle, many erect serrate-tipped scales, black on the sides, brown in the middle. 



Prothoracic lobes elliptical, remote dorsally, blackish, clothed with narrow, 

 curved, white and pale-brown scales in the middle and many dark bristles. Meso- 

 notum blackish clothed with narrow, curved bronzy-brown scales, the anterior 

 edge margined with white running to the middle of the sides, a white stripe start- 

 ing behind the lateral depression and running to the posterior margin, ante- 

 scutellar space edged with white; bristles rather numerous, long, black. Scu- 

 tellum trilobate, brown, clothed with narrow, curved white scales, each lobe with 

 a tuft of black bristles. Postnotum elliptical, prominent, dark brown, nude. 

 Pleurae and coxae pale brown, with small patches of elliptical, flat white scales 

 and rows of small brown bristles. 



Abdomen subcylindrical, flattened, truncated posteriorly; dorsal vestiture 

 black, a yellowish-white band at base of each segment, widening at the side into a 

 row of white lateral patches ; first segment with small median and lateral patches 

 of white scales and with many pale hairs ; venter yellowish white, each segment 

 with a black V-shaped mark with the apex on the posterior border of the segment. 



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

 cell, that of second posterior cell shorter than its cell ; basal cross-vein distant its 

 own length from anterior cross-vein ; scales brown, black costally, intermixed 

 with some white ones on costa and subcosta, outstanding ones dense, long, linear, 

 base of third vein with a slight tuft. Halteres whitish. 



