260 NEW YORK STATE MUSEUM 



The full grown larva is about 3^; inch in length, rather stout, legless, 

 and with dark brown mouth parts. The pupa is about ^ inch in length, 

 possesses the shape and general characters of the adult, and with the 

 dorsum of the penultimate segment ornamented along its posterior margin 

 with a nearly transverse row of four stout spines, a pair just in front of 

 these, one on each side, and smaller ones on the anterior margin of the 

 same segment. The terminal segment bears a single row of four rather 

 small, curved spines on its dorsum. 



The various stages of the insect have been minutely described by 

 Dr Packard. 



Distribution. This species is probably widely distributed in northeast- 

 ern United States, since Dr Packard reports it as a common form, and it 

 has been listed from Mt Washington, by Mrs Slosson, and from Ohio and 

 southwestern Pennsylvania, by Messrs Hamilton and Dury, while Mr Ulke 

 reports it as very common in the District of Columbia. 



History. This insect is a common species and has been brought to the 

 attention of economic entomologists, at various times, and occasionally 

 it must be abundant, though it rarely causes apprehension on account of 

 its killing trees. 



Life history. Nothing very definite has been recorded concerning 

 the life history of this insect, though it is probable that the trans- 

 formations are completed in one year. The larvae and pupae were 

 taken by us in April and May, and beetles appeared in large numbers 

 throughout the latter month. The eggs are probably deposited in 

 crevices of the bark. 



Food plants. Dr Packard has named this insect the oak Clytus because 

 it appears to infest this tree most frequently, though as stated above, we 

 have bred it in enormous numbers from hickory. It has been met with by 

 Mr Hunt, under the bark of sugar maple in the Adirondacks, and Dr Hop- 

 kins reports it as infesting logs and dead trees of black oak, white oak, 

 hickory, chestnut, ash and elm. Dr Smith, in addition to those named 

 above, lists it from chestnut and "other trees." Mr Young took a beetle at 



