AEDES ^STIVALIS 741 



AEDES ^STIVALIS (Dyar) Dyar & Knab. 



Culex reptans Dyar (not Linne, not Meigen), Proc. Ent. Soc. Wash., vi, 38, 1904. 



Culex cestivalis Dyar, Journ. N, Y. Ent. Soc, xii, 245, 1904. 



Orabhamia cestivalis Dyar, Proc. Ent. Soc. Wash., vii, 48, 1905. 



Grabhamia cestivalis Dyar, Journ. N. Y. Ent. Soc, xiii, 54, 1905. 



Aedes cestivalis Dyar & Knab. Journ. N. Y. Ent. Soc, xiv, 201, 1906. 



Ochlerotatus wstivalis Coqulllett, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 21, 1906. 



Ochlerotatus cestivalis Dyar, U. S. Dept. Agr., Bur. Ent, Giro. 72, 6, 1906. 



Original Description of Culex .^sttvalis: 



I propose this name for the species called Culex reptans in my article on British 

 Columbian mosquitoes (Proc ent. soc Wash., vi, 38, 1904). It is clearly not the 

 European reptans (nemorosus) , nor is it lazarensis Felt & Young, which has a 

 peculiar larva that I had not seen till I examined a specimen kindly sent to me by 

 Dr. Felt. The larva of cestivalis is characterized by the air tube being about three 

 times as long as wide, the pecten without detached teeth, followed by the tuft; anal 

 segment almost completely ringed by the plate, the barred area running nearly to 

 the base, two tufts before it practically reaching base; comb of the eighth segment a 

 large patch of thorn-shaped spines fully three rows deep. 



Description of Female, Male, and Larva of Aedes ^stivalis : 



Female. Proboscis moderate, subcylindrical, uniform, the labellse conically 

 tapered; vestiture black, setae on labellae minute, outstanding. Palpi short, 

 about one-fifth as long as the proboscis, black ; setse moderate, bristly. Antennae 

 slender, the joints subequal, rugose, pilose, black; second joint slightly thick- 

 ened and yellowish; tori subspherical, with a cup-shaped excavation, luteous, 

 darker and with pale scales on inner side ; hairs of whorls sparse, moderate, black. 

 Clypeus short, broad, rounded triangular, black, nude. Eyes black. Occiput 

 black, broadly clothed on the vertex with narrow, curved, dull creamy scales, 

 on the sides broad, yellowish white ones, with an ill-defined lateral black patch, 

 many short, erect, forked, pale scales on the nape ; bristles along margins of eyes 

 black, those projecting between the eyes pale. 



Prothoracic lobes elliptical, remote dorsally, black, clothed with lanceolate, 

 yellowish-white scales and dark bristles. Mesonotum black, clothed with nar- 

 row, curved scales, creamy white and golden brown ; a broad median stripe and 

 on posterior third narrow sublateral stripes of golden-brown scales, scales along 

 anterior edge, sides of disk and about antescutellar space yellowish white; 

 humeral angles golden-brown-scaled. Scutellum trilobate, black, clothed with 

 narrow curved yellowish-white scales, each lobe with a group of brown bristles. 

 Postnotum elliptical, prominent, blackish, nude. Pleurae black, coxas luteous, 

 clothed above with narrow, curved yellowish scales, below with patches of 

 broadly elliptical, flat, white scales and rows of pale bristles. 



Abdomen subcylindrical tapering posteriorly; dorsal vestiture black, with 

 rather narrow white basal segmental bands which widen to triangular patches 

 on sides, the first segment with white scales and with numerous fine pale hairs ; 

 venter entirely whitish scaled. Cerci black. 



Wings moderate, hyaline ; petiole of second marginal cell much shorter than 

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

 distant about its own length from anterior cross-vein; scales deep brown, the 

 outstanding ones broadly linear. Halteres pale, with whitish knobs. 



Legs moderately long and slender ; femora yellowish-white scaled below, with 

 black ones above and a black ring before the tip; knees white; tibiae largely 

 whitish scaled below, black above, tips of hind pair black ; tarsi bronzy brown 

 scaled, beneath with many pale scales forming a distinct line on first two seg- 

 ments and becoming fewer outwardly, the terminal joints entirely dark. Claw 

 formula, 1.1-1.1-1.1. 



Length : Body about 4.5 mm. ; wing 4 mm. 



Male. Proboscis moderate, straight, bronzy-brown scaled. Palpi exceeding 

 the proboscis by the length of the last joint ; end of long joint and last two joints 



