Notes on the Commoner Species 185 



the adult lived from eleven to twenty-eight days. 

 The eggs are single, hatching in twenty-eight days. 

 The larval life is about five days, the pupal life two. 

 Hibernation is doubtless in the egg stage. 



Ochlerotatus serratus. — This species bred in the 

 swampy wood near the bayou, and required consider- 

 able patience to catch, as it was not, as a rule, blood- 

 thirsty. We never found them indoors. In Baton 

 Rouge the adults were found from May 12 until 

 September 1. They bit once, laying one batch of 

 eggs three to five days later. Hatching took place in 

 ten days in warm weather if agitated, but ova have 

 kept under water from one July to the next before the 

 larvae emerged. The larval life is about ten days, 

 the pupal two. Larvae were taken as late as Sep- 

 tember 22, but hibernation is doubtless in the egg 

 stage. The ova resist drying well. The adult lives 

 but a few days in captivity. 



Ochlerotatus dupreei (Fig. 37, page 186). — This 

 small species ranges from New York to Louisiana, 

 where it was originally taken by Dr. Dupree. It sel- 

 dom bites, but our bred specimens did so the third or 

 fourth day after emerging, before mating, but not 

 more than one meal would be accepted. They did 

 not lay, but, judging from dissection of the ovaries, 

 they do not form a raft. The species is not abundant 

 south, being found from June 29 to August 25, and has 

 been taken, but rarely, north to New Jersey. The 

 larvae are found in pools of clear water in the woods, 

 where they nibble over the leaves and grub in the 

 debris on the bottom. The only time they come to 

 the top is when they pupate. The anal gills are 



