INSECUTOR INSCITI^ M^NSTRUUS 111 



rapid swarm was observed in a low bush about three feet from 

 the ground. It was netted and proved to be curriei. Half an 

 hour later, when it was getting too dark to see distinctly, an- 

 other group of males was seen in a taller bush {Sarcobatus 

 venniculatus) , circulating among and over the top branches. 

 They did not swarm over the writer's head, although some 

 idaho'ensis were doing so at the time, and as I approached the 

 bush the two swarms became slightly mixed, though the idaho- 

 'ensis were higher. Next evening I visited the same bush and 

 observed two swarms over it. One was over the top of the 

 bush and proved to be idaho'ensis ; the other a little to one side 

 and below the top, on the lee side, was curriei. Also the same 

 evening, in the open, a swarm gathered over my head, partly 

 mixed with nigromaculis. In netting mosquitoes to avoid their 

 bites one night in walking from the river to the town at Laurel, 

 of about 600 specimens so caught three were males of curriei. 

 They had evidently been swarming over my head. 



As determined by Knab, the larvae appear in the early snow 

 pools on the prairie. In the presence of irrigation, however, 

 other broods appear, probably every time favorable pools are 

 formed. I establish the fact that eggs will hatch the same 

 year as laid. At Reno, Nevada, I got curriei eggs from cap- 

 tive females, allowed them to dry, then added water in about 

 ten days and a part of the eggs hatched. The water was 

 poured off and the procedure repeated, when more eggs 

 hatched. There is thus seen to be no physiological difference 

 between curriei, the inland form, and quaylei of the Pacific 

 coast, as was supposed. Both hatch whenever they get water. 



The larvse of curriei (Laurel, Montana) have the head 

 hairs single like quaylei of the coast, and onondagensis of New 

 York. The comb scales are evenly fringed with long spines, 

 quite as in quaylei. In onondagensis there is a slight differ- 

 entiation of the central spine, but not on all the scales. Curriei 

 from Reno, Nevada, have single head hairs and a slight dif- 

 ferentiation of the central spine of the comb scale. 



Aedes campestris Dyar & Knab. 



Recorded by Parker, the determination by Knab. This is 



