750 MOSQUITOES OF NORTH AMERICA 



Larva about % inch long. Antenna brown, slightly fuscous apically, stout, 

 slightly swollen at the base, gently curved and tapering gradually to a somewhat 

 blunt apex. Tuft at the basal third consisting of about four apparently simple 

 hairs. Tip with one long segmented apical process, a shorter, much more slender 

 one, a stout, long process and a considerably stouter, short one. Surface, specially 

 apically, ornamented with rather large, stout, somewhat isolated, chitinous spines. 

 Labial plate broadly triangular with about 25 rather fine teeth. Comb consisting of 

 a somewhat triangular patch of about 16 scales, each with a spatulate, enlarged base, 

 coarsely and rather sparsely setose on the sides and with a stout subapical and a 

 rather long apical spine, the latter as long or longer than the body of the scale. Air 

 tube stout, about three times as long as broad, slightly swollen at the basal third and 

 tapering gradually to the tip. Pecten consisting of two rows of closely set, stout, 

 dentate spines, 20 to 24 in each, with a compound hair just beyond the tip of each 

 and at about the middle of the air tube, each tooth usually with one large and two 

 or three smaller denticulations, basal portion about one half the length of the longer 

 terminal spine. Chitinous ring of ninth segment about two thirds as long as broad, 

 inclosing the entire segment, barred area short. Dorsally there is a long, simple 

 caudal seta. 



This larva presents a striking resemblance to that of the typical C. aurifer larvae 

 from New Jersey. A close examination, however, shows that marked differences are 

 presented by the antennae, the tuft being at the basal third in this form instead of 

 beyond the middle, as in the true aurifer. There are more teeth in the labial plate 

 and an examination of the comb scales reveals a considerable difference between 

 the lateral serrations at the base which, in this form, have the two subapical teeth 

 on either side of the central spine considerably stouter than the preceding ones, 

 whereas in the true aurifer there is no such marked difference. The teeth of the 

 pecten are more closely set and in aurifer the base of each pecten tooth is a little 

 stouter and usually possesses more serrations. The chitinous ring of the ninth seg- 

 ment incloses the segment in this form and does not in aurifer. 



Description of Female, Male, and Labva of Aedes aukoides : 



Female. Proboscis moderately long, subcylindrical, "uniform; labellse coni- 

 cally tapered ; vestiture black ; setae on labellge minute, curved, black, outstand- 

 ing. Palpi short, less than one-fifth as long as proboscis, black ; setfe moderate, 

 bristly. Antennae filiform, the joints subequal, rugose, pilose, black; second 

 joint longer than third, slightly thickened and paler at base ; tori subspherical, 

 with a cup-shaped apical excavation, luteous, darker and with a patch of whitish 

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

 triangular, prominent, black, nude. Eyes black. Occiput black, scales on vertex 

 narrow, broad on sides, light golden yellow, a little paler laterally ; 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 narrowly 

 and broadly lanceolate yellowish-white scales and brown bristles. Mesonotum 

 black, clothed with narrow curved scales, a distinct straight stripe medianly 

 of smaller bronzy-brown scales which does not reach antescutellar space, sides 

 pale golden yellow, with more or less of a brown tint, paler at anterior angles 

 and posteriorly ; bristles around the antescutellar space and over roots of wings 

 golden yellow. Scutellum trilobate, black, clothed with narrow, curved, pale- 

 golden yellow scales and each lobe with golden yellow bristles. Postnotum 

 elliptical, prominent, blackish, nude. Pleurae black, coxae luteous, with rows of 

 pale bristles; clothed with patches of elliptical, flat white scales, prothoracic 

 epimera clothed with narrow, curved brown scales. 



Abdomen subcylindrical, tapering posteriorly; dorsal vestiture black, with 

 rather narrow, white, basal segmental bands which are narrow or obsolete cen- 

 trally and widen to triangular patches on the sides ; first segment with whitish 

 scales and many fine pale hairs ; venter whitish scaled, with the tips of the seg- 

 ments centrally black marked ; cerci black. 



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

 that of second posterior cell about the same length as its cell ; basal cross-vein 

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

 the outstanding ones broadly linear. Halteres whitish, with darker knobs. 



