14 Journal New York Entomological Society. [Voi. x. 



tober 2oth, and found anywhere from 5 or 6 to 30 or more eggs in a 

 single leaf. Oviposition was continuous; but on only two occa--ions 

 were adults seen apparently engaged in the process. It may be that 

 the egg-laying is done mostly at night. 



Af er the eggs had once been identified there was no difficulty in 

 finding them ; but it was noted that in the older leaves where larvae were 

 now most abundant, eggs were not so plentiful as they should be to 

 account for the large winter supply. So attention was directed to the 

 younger leaves even where there was as yet no water in them. Here, 

 it was discovered, was the favorite place for ovipositing, with this 

 species. Eggs were laid in leaves as yet perfectly dry ; at the bottom 

 and at the sides ; singly or in little groups ; whether by one or more 

 than one female was not ascertained. Of the old leaves many become 

 imperfect in late fall and any puncture or decay allowing the water to 

 escape, would of course mean the death of the larvae. So the new 

 leaves are selected and in them many more eggs were found than in 

 the others. In one case Mr. Brakeley counted up to 75, then lumped 

 the remainder and called it 100. It is scarcely probable that any one 

 female of this species is capable of producing 100 eggs of the compar- 

 atively large size of those in (juestion ; so two at least and possibly 

 more females may ovii)osit in a suitable leaf. 



Observations were continued until frost, which came unusually 

 early in 1901. Up to November eggs were found and, early in that 

 month, a few pupa;. So breeding is continued just as long as there 

 is a chance to keep it up. 



The eggs are chestnut brown in color, somewhat chunky, bean- 

 shaped, the ends somewhat pointed, the inner margin nearly straight. 

 There is no evident sculpture ; yet when first mounted and examined 

 under the microscope, there seems to be a somewhat irregular tessel- 

 lated reticulation that disappears later, when the shell becomes more 

 transparent. 



In the previously published notes it was brought out that this 

 larva does not need to come to the surface for air as much as recorded 

 for Culcx. Dr. Howard informs me that a lot of larvae that I sent 

 him lived for nearly two weeks under a film of oil which covered the 

 surface of their breeding jar. 



One of my students demonstrated in the laboratory a very com- 

 plete tracheal system in the anal processes of the larva ; so we have 

 really a gill structure, by means of which the insect gets its supply of 

 oxygen directly from the water. 



