172 INSECUTOR INSCITI^ MENSTRUUS 



Aedes (Aedes) cinereus Meigen, 



Additional data are as follows : Lakes Center Camp, Plumas 

 County, California, issued from pupse, June 30 and July 1, 

 1920 (H. G. Dyar). 



These larvse, the only ones found, occurred in some ditch- 

 pools which dried out the following day, several days before 

 pupation, so that if these larvae had not been collected, they 

 would all have perished. The altitude is 6,200 feet ; previous 

 records being Fallen Leaf Lake, 6,100 feet, and Yosemite 

 Valley, 4,000 feet. 



The larvae were associated with hexodontus, the latter being 

 in the pupa stage, and probably emerged in part before the 

 pools went dry. 



Aedes (Aedes) ventrovittis Dyar. 



The discovery of the male gives the unexpected result that 

 this is an ally of Aedes cinereus Meigen. 



Male. Palpi short, about one-eighth as long as the pro- 

 boscis, black ; antennae plumose, black, the rings white on the 

 narrowed part, the last two joints long and slender. Meso- 

 notum with bronzy brown scales and two rather broad bands 

 of black ones running back to near the antescutellar space ; 

 posterior side stripes indistinct and narrow. Abdomen black 

 above, with basal, lateral, small, segmental, triangular whitish 

 patches ; venter with dull whitish scales, the apices of the seg- 

 ments and mid-ventral line black. Wing scales all black. 

 Legs black scaled, the femora white beneath, their tips nar- 

 rowly white. 



Hypopygium. Side pieces about two and a half times as 

 long as broad, tapering sharply at the tip. Clasper subapical, 

 furcate at the tip, the outer arm the longer, finely tubercular, 

 but without spine; an elliptical process at the base, bearing 

 setae on outer margin. From the base of the side-piece mem- 

 brane arise two lobes, divaricate, each with three setae. Basal 

 angle of side-piece with a large patch of hairs and a small lobe. 

 Tenth sternites narrow, normal. Aedoeagus expanding out- 

 wardly, curved, dentate at tip, all exactly as in cinereus 

 Meigen. 



