﻿New Species of Ipidac from Maine 127 



Fronotuni 1.35 times as wide as long; widest posteriorly, sides 

 arcuately rounded to the front, which is rather narrow; front 

 margin Avith from three to seven serrations varying in size and 

 arrangement but never with the first pair on each side contiguous 

 as in balsameus; those on each side of the median line usually 

 separated by a considerable space which is occasionally occupied 

 by a small median serration; asperities rather sparse, irregularly 

 distributed, occasionally several are contiguous or coalescent at 

 their bases, asperate area concolorous ; sides and rear of pronotum 

 finely and densely" granulate-punctate ; pubescence shorter than in 

 balsameus. 



Elytra very slight!}- wider than prothorax 1.52 times as long as 

 wide, nearly two and one-third times as long as thorax; sides sub- 

 parallel, moderately rounded behind as viewed from above ; dis- 

 tinctly punctate-striate, the punctures being more evident and 

 the striae much more impressed than in balsameus and evident 

 throughout their length ; interspaces "\ ery finely and densely punc- 

 tured witli numerous scale-like hairs and a median row of slender 

 hairs in each interspace which are coarser and longer at the sides ; 

 hairs from the strial punctures very fine and short. 



The male is usually smaller than the female and can be dis- 

 tinguished by the more narrowly rounded elytra. 



Type— A female, Orono, Maine, July 17,^1919, M. W. Black- 

 man, collector; Lot No. M-98. 



Additional Localities Loon Lake. Chamberlin Lake, Me., Cran- 

 berrj^ Lake, N. Y. 



Host Trees — Red spruce {Picea rnhens Sarg.) white spruce 

 {Picea canadensis (Mill.) B. S. and P. 



This species is very similar in general appearance to C. bal- 

 sameus Hopk. and is found in the same localities where the latter 

 is abundant. It is readily distinguished, however, not only by its 

 hosts but also by the character of the frons, the smaller and dif- 

 ferently arranged pronotal serrations, the more strongly punc- 

 tured and impressed el^^tral striae, the more evident hairs on the 

 elytral disc and by other differences. It is distinguished from 

 C. rubensis Hopk. by the slightly smaller size, darker color, the 

 absence of the carinal line on the frons and the difference in the 

 serrations of the pronotal margin. 



The type series consists of several hundred specimens taken by 

 the writer in Maine during the summer of 1919, a short series 

 from Cranberry Lake, N. Y., taken June 15, 1920, by Professor 

 C. J. Drake and Mr. A. E. Fivaz from limbs of red spruce, and 

 numerous specimens from the same locality taken by Blaekman 

 and Fivaz during the summer of 1921. 



The brood burrows are usually of the "cave" type similar to 

 those of C. balsameus. HoAvever, several burrows containing 

 several definite branch-galleries were found and in such cases the 

 eggs were usually de])osited in a small heap at the blind end of 

 the gallery and covered with frass. In one ease they had been 



