April, 1921] A New Ambrosia Beetle 203 



beetles, but the insect does not seem to breed or normally live 

 beneath the bark. It prefers the branches of the trees and feeds 

 largely upon leaf insects. Two or three adults have been taken 

 in the burrows of Ipidas in spruce. During September, 1919, the 

 writer reared a specimen of Tetraphleps n. sp. from the burrows 

 of Cryptorhynchiis lapathi Linn., which was breeding in Bebb's 

 willow, Salix bebbiana Sarg. This species, however, is a common 

 insect on pine trees, feeding largely upon leaf feeding insects of 

 the pine. 



I am indebted to Mr. Chas. Dury for identifying the beetles 

 found in the burrows of Ipidce listed herein, and Mr. J. M. 

 Swaine has very kindly compared the new species of Anisandnis 

 with his types of A. minor and popidi. 



Fig. 1. a, Anisandnis swainei n. sp. (female); h, work of Xylolerinus politus Say 



in beech. Photo by author. 



Anisandrus swainei n. sp. (Fig. la, photo of female — paratype.) 



Female: Closely allied to A. pyri peck, but stouter and with the 

 pronotum more acutel}^ rounded in front and on the sides; declivity 

 with the stria3 more deeply impressed; with the sides hardly angulate 

 at the declivity although a little stouter in form than either A. pyri or 

 A. minor. In the key to the species of the genus Anisandrus* the female 



* vSwaine, J. M., Canadian Bark-beetles, Part II. Dom. Can. Dept. Agr. 

 Bull, No. 14, 1918, p. 124. 



