Notes on the Commoner Species 189 



in the egg form. The adults bite once before ovi- 

 position, depositing a batch of from thirty to forty- 

 five single eggs four or five days later, which hatches 

 in ten days. The life of the larva is about seven 

 days, that of the pupa two. Dr. Smith says that 

 the wigglers prefer the deeper pools, concealing 

 themselves among the leaves at the bottom, not 

 often coming to the top, nor staying there any 

 length of time. The species is not troublesome, al- 

 though sometimes locally common in the woods for 

 a short time. 



Ochlerotatus trivittatus. — This species ranges 

 over the eastern United States, as far as northern 

 New York, but was not taken in Baton Rouge. Dr. 

 Smith says that it is never found in towns or even 

 on porches. The attack of these insects is fierce, 

 but as the objective point is generally below the 

 knees, they are able to do little actual biting. Tri- 

 vittatus breeds in woodland rain-pools. The adults 

 were taken in New Jersey from July 2 to Sep- 

 tember 3, in the northern part of the State. The 

 larvae were found from June to August 12, being 

 comparatively rare. It is probable that this species 

 winters in the egg stage. 



Pneumaculex signifer. — This mosquito, which 

 bears in the adult form a rather close resemblance to 

 6". calopus, ranges from Louisiana and the Mississippi 

 River northward to New York. The adults were 

 taken at Baton Rouge in the wood near the creek, 

 and also once on the campus at the willow pool, but 

 they would not bite. Mr. Seal says that the larvae 

 were found in company with C. pipiens in a tub of 



