490 MOSQUITOES OF NORTH AMERICA 



ventral surface suffused with silvery white scales. Wings hyaline, clothed with 

 dark brown scales, the fringe being a slaty gray and composed of scales of various 

 length, as in C. pipiens, and the costa and subcosta flaked with silvery white 

 scales. Petiole of first submarginal cell nearly one half the length of the cell, that 

 of the second about three fourths. Posterior cross vein close to the mid cross 

 vein and sometimes almost interstitial. Coxae whitish, semitransparent; under sur- 

 face of femora and tibiae whitish, other portions dark brown flecked with yellowish 

 white scales and with apical white bands; tarsi black, sparsely flecked with white 

 scales, claws simple. 



Described from a freshly bred specimen. 



The larva of this species was found in association with those of Anopheles 

 punctipennis, Culex territans and C. sylvestris. It was easily recog- 

 nized in the water by its size and dark color, it being about as large as the larva of 

 C. cantans or C. cinereoborealis, and occurred singly in water several inches 

 deep, coming to the surface only after rather long intervals. 



Antennae rather stout, slight curved and somewhat enlarged at the base, apical 

 portion fuscous; a well developed tuft of plumose hairs slightly before the middle; 

 two long subapical, two long apical spines and a short, stout process on the tip. 

 Labial plate broadly rounded, triangular, with about 25 coarse teeth; mandible very 

 similar to that of C. absobrinus. Thoracic and anterior abdominal segments 

 clothed with numerous stout, black, plumose hairs, the larger abdominal segments 

 bearing slightly compound, weakly plumose hairs. The comb consists of a triangular 

 patch of about 40 scales arranged in about five irregular rows, each scale with a dark 

 brown, basal, somewhat spatulate enlargement and terminated by an expanded, nearly 

 colorless tip, bearing a series of rather fine, subequal, apical spines, smaller spines 

 extending on each side to the extreme base. Air tube about four times as long as wide, 

 slightly inflated and with two rows of pecten at the basal sixth, each consisting of 

 about 14 closely set teeth bearing at their bases two or three conspicuous processes, 

 pecten extended by a well marked row of 17 simple bristles reaching to the apical 

 third or fourth. There is a posterior pair of compound, plumose hairs at the base of 

 the air tube. Ventral tuft short and consisting of about 15 well developed, compound 

 hairs attached to the barred area. Dorsal tuft composed of a very stout, compound 

 hair and a smaller one with many more branches. 



This larva closely resembles that of C. absobrinus and may be separated 

 therefrom by the smaller number of comb teeth (which are also shorter and stouter), 

 the greater number of basal processes on the pecten, and the decidedly different 

 character of the labial plate. There are also other differences as will be seen by 

 reference to the above description. 



Description of Female, Male, and Larva of Cltliseta inornattjs : 



Female. Proboscis rather long, uniform, the labellfB long, not thickened; 

 vestiture of dark brown scales, rather thickly intermixed with pale ones; seta 

 rather numerous but very short and curved, those on labellae more prominently 

 outstanding. Palpi short, one-fifth as long as proboscis, dark scaled, tips white, 

 and with rather numerous dark brown sets. Antennse moderate, the joints 

 subequal ; tori rather small, globose, light brown, a few whitish scales on inner 

 side; shaft thickly clothed with pale pubescence, whorls at bases of segments 

 sparse and short; second joint with a row of whitish scales on the inner side. 

 Clypeus rounded, broad, rather small, dark brown, pruinose, nude. Eyes black. 

 Occiput blackish, clothed rather sparsely with narrow, curved pale ochraceous 

 scales and a number of black, erect, forked scales posteriorly, a narrow white 

 margin along the eyes, cheeks covered with broad white scales; a row of black 

 bristles near margins of eyes. 



Prothoracic lobes small, remote, clotlied with pale scales and a number of 

 long brown bristles. Mesonotum dark brown, with two short narrow bare 

 stripes anteriorly, vestiture rather sparse, composed of narrow, curved pale 

 ochraceous scales intermixed with smaller golden-brown ones, the pale scales 

 predominate along the margins, in three longitudinal lines on the disk, and 

 oblique marks from the middle of the sides, around the ante-scutellar space and 

 over the roots of wings; bristles rather numerous, on the disk principally in- 

 serted in longitudinal impressed lines. Scutellum trilobate, each lobe with a 

 group of many long brown bristles, and a small patch of pale ochraceous, 



