INSECTS INJURING OAK-LEAVES. 



163 



on the scrub willow {Salix humilis) in northern Illinois, and on a rose 

 bush, and states that they also occur on the common hazel, while Glover 

 records them as living on the wild black cherry. 



Fig. 57. — H. maia ; a, larva fully grown ; b, pupa — natural size ; c, abdominal, d, thoracic spine, of 

 newly -hatched larva ; e, spine of larva after first molt ; /, g, spine of larva after third and fourth 

 molts — enlarged. — After Riley. 



In the Central and Eastern States the moths begin to issue from the 

 ground late in September and early in October, " the males almost al- 

 ways appearing first " (Riley). Both Lintner and Riley record cases 

 where the moths were retarded a whole year. " From a batch of larrse, 

 which had all entered the ground before July 1, 1871, one moth did not 

 issue till October 8, 1872." (Riley.) 



Fic 58. — Hemileuca maia, male buck moth. — After Riley. 



The eggs are deposited to the number of from one hundred to two 

 hundred in naked belts, the smallest number of eggs in a mass being 

 seventy. Riley thus describes the process of egg-laying : 



Holding firmly by all her feet, the female stations herself upon a twig, with her 

 head usually toward its end. She then stretches her abdomen to its fullest extent 

 and fastens the first egg; another is then attached by its side, and so on, the body 

 reaching round the twig without letting go the feet. In this manner, governed by 



