166 JouRNAf, New York Entomological Society. |Voi. xvui. 



lected from July 6 to i6 were all males. On the latter date I found 

 the first female, and then both sexes occurred till the twenty-second, 

 when the females became more numerous. September 6, I still took 

 them in rather large numbers, but after that time they occurred less 

 and less frequently. Among 2"] Cercsa specimens collected on Sep- 

 tember 19, in the region south of Newark. I did not find a ?ingle 

 taiirina. 



6. Ceresa palmeri v. D. 



June 2y I found nymphs of this species quite numerous on Liquid- 

 anibar. These became still more frequent until July 7, when I col- 

 lected the first mature insect. (There were only males up to June 

 16.) By July 19 the females were more abundant by far, and I col- 

 lected varying numbers of both sexes. I also found nymphs as late 

 as July 25. One was also collected by Dr. Lutz, August 2, in the 

 Bronx, New York City, and I took 6 females on the same day. I 

 examined these for eggs but found them all empty. From then till 

 September 19. only females were taken. 



7. Ceresa borealis Fairm. 



The first were found July 21 and 22 — 6 females and 5 males. 

 August I I found 2 more males and 3 females. They were very 

 plentiful from September 6 to 19, when the last lot — all females' — 

 were collected. 



8. Stictocephala lutea Walk. 



I found these to be plentiful as early as June 13 on a smooth 

 species of Solidago. I collected several, and also looked for nymphs 

 and nymph-moults. I observed but one specimen, however, likely to 

 have been the nymph of lutea. It was perched by the side of an 

 adult insect, but on my approach, both dropped into the grass and 

 escaped, so I obtained only a fleeting glance of it. This nymph was 

 grayish-blue in color with two long, spreading, anal projections 

 which however are present in all nymphs, but are shorter. The 

 adult insect is usually found under the crown of the plant, rarely 

 within it. When approached it has the habit of trying to hide by 

 darting to the side of the stem opposite the observer. I have noticed 

 the same habit in some beetles and young grasshoppers. June 13 I 

 found both sexes in equal numbers, but took males only between this 

 date and the twenty-seventh. On the latter date, however, I found 



