THE CANADIAN ENTOMOLOGIST. 61 



in 1899, and also in Sequoia. Going from San Francisco to De! Monte 

 and Monterey, California, he found the same thing in living Lavvson's 

 cypress on the grounds at Del Monte, and especially abundant in the 

 broken branches and recently-felled trees of the Monterey cypress in the 

 original grove at Cypress Point. He thinks that the original home of the 

 species is in the ancient grove, but it has been distributed further north 

 with the tree, which has been extensively planted for hedges and as an 

 ornamental tree. We have here another example of a beetle which in 

 its original host plant and distribution is not destructive, but becomes so 

 under different environments and with change of habit. He also found 

 Dendroctoiius valeiis working serious damage to the Monterey pine, and 

 associated with it a number of species of Tomicus, Pityophthorus, etc., 

 which appear to be causing considerable trouble. He mentioned also the 

 timber which had been destroyed by fire, mentioned by Mr. Schwarz at a 

 previous meeting, and spoke of the great number of beetles breeding in 

 the injured trees and spreading their depredations into living ones. Re- 

 turning from Monterey on the Santa Fe R. R., he visited Williams, 

 Arizona, to examine a trouble there reported by Mr. Schwarz, which was 

 causing the death of a considerable number of pine trees. This was found 

 to be caused by Dendroctoiius approximatus, Dietz., and also by two un- 

 described species of Dendroctonus, which are closely allied to D. fron- 

 talis. He found also that among the Pinon on the rim of the Grand 

 Canon, and between there and Williams, individual trees were dying and 

 infested with Tomicus and other bark beetles. 



(To be continued.) 



NEW ORIENTAL ALEURODID.^. 



BY A. L. QUAINTANCE, COLLEGE PARK, MD. 



Aleurodes Marlatti, n. sp. 



Egg. — Size about .1 mm. x .2 mm., exclusive of stalk, which is quite 

 short, holding egg in upright position on leaf; regularly elliptical in 

 outline. Colour, dirty yellowish brown, as seen on leaf; under 

 transmitted light, yellowish. Shell without markings or sculpturing of 

 any kind. 



Larva. — Broadly elliptical. Colour, except in first stage which is 

 yellowish, brownish to brownish black, varying in some specimens to an 

 iridescent blue black ; in later stages, margined all around with a short, 

 rather squarely-trimmed, white, waxy secretion, from the marginal wax 



