62 Journal New York Entomological Society. [V°1- ^^• 



season, I found the first insects in the act of egg-covering on August 

 15. They always worked on the under side of the branch, and on the 

 south side of the bush, as they do on Vibiirmim. 



The oviposition of Enchcnopa binotata lasts until October, when 

 the frosts kill them. During that month I found the insects less 

 lively and in one case, on October 8, I found one insect on the same 

 spot and in the same position as the preceding week. Thinking it 

 was dead, I took it down, but while holding it in my hand for a Tittle 

 while, it revived and leaped away before I got the bottle ready for 

 collecting it. 



How many of the covered egg-groups are produced by one 

 female I have not been able to make out, but there are a number. 

 Of the insects I collected at work on August 6, I found one contain- 

 ing 6, the other 10. In the insect with the half-finished covering 

 there were 5 more eggs. On September 3, one insect collected pur- 

 posely for inspection still had 19, another on October I, 7 eggs, and 

 one collected on October 8, which died on the 14th, had still 24 eggs, 

 of which 4 were found in the thorax and 20 in the abdomen. 



The autumn eggs differ from those eggs found in spring (Fig. 

 6a), being thinner, a little curved, as shown in Fig. 6b. According 

 to the statement of Dr. Lintner (p. 286), concerning the eggs of 

 Enchenopa binotata on Celastrus, inspected by Dr. Hagen, they must 

 vary considerably in size and color, for his measurements are different 

 from mine on Ptelca, Viburnum and Robinia, where I found them 

 about 1-1.3 mm. in length, and of a more or less milky, glassy appear- 

 ance. Mr. Sidney I. Kornhauser recently favored me with a letter, 

 in regard to his observations on that species, in which he says : " The 

 frothy mass is secreted from a pair of big sacs at the end of the ovi- 

 duct. These sacs have glands attached, and contain a very sticky 

 substance. Both cuts are then covered by this white froth. The eggs 

 are first soft and often much out of shape, but later they become more 

 rounded and force the crack in the stem open." Oviposition lasted 

 from August 6, during the month of September, until October. Most 

 work had been done in the first part of September ; from that time on 

 I could not find the coverings increasing much in number. Of course, 

 the observed bushes had been frequented only by a small number of 

 insects and so I found colonies of the tgg coverings very small. The 

 best covered fvvig showed on October 15 only 11 specimens: the 



