LIFE HISTORIES OF FROGHOPPERS OF MAINE. 275 



During June only young are to be found and during this 

 period they pass through three or four moults. Three instars 

 at least are represented in material collected June I9th, 26th 

 and 27th. 



In rearings from nymphs collected on grass the latter part 

 of June adults were secured during the first week in July. In 

 one case a nymph enclosed June 29th moulted July ist and 

 emerged as adult on July 5th and in another case a nymph 

 probably recently moulted caged July 9th, developed to matu- 

 rity and adult emerged July nth. These all indicate a short 

 nymphal period and rapid growth. 



The adults continue to feed and up to July 29th no signs of 

 egg maturity or egg deposition had been noted. Egg develop- 

 ment is evidently slow and mating and egg deposition must 

 occur irregularly, probably extended over a period of some 

 weeks in autumn. 



Ovaries from females, collected in the field, were dissected 

 and four well developed eggs were found with definite shell, 

 but no evidence of segmentation. A number of apparently 

 undeveloped eggs were in the ovarioles. 



A 



Fig. 39. Relative form of head in Ph. lineatus and spumarius nymphs 

 of final instar. 



Comparing the final instar especialy with spumarius the 

 head is longer and the front more distinctly produced. In 

 spumarius the part in front of the suture is in the ratio of 10 

 to 24 while in lineatus it is as n to 20 and the head entire in 

 spumarius is in ratio of 44 wide to 31 long in lineatus as 40 

 wide to 34 long as taken in average for several specimens. 



Lineatus is further distinguished by the dusky coloration 

 especially toward the posterior end of the body as the nymph 

 approaches maturity. 



Some very small specimens of this species were taken at 

 Saddleback Lake in the summer of 1916, the smaller ones only 



