THE PINE INVESTIGATION. 393 



largest of North American Scolytids. it varies in length from 

 5.2 8.5 mm. or .20 .34 inch, color light reddish brown to 

 black. It has been recorded from Canada and Florida in the 

 east, and from Washington to Mew Mexico in the west, and is a 

 common enemy of the pine in West Virginia, therefore, it evi- 

 dently occurs throughout the United States wherever the pines 

 grow. It attacks living and injured pines probably of all 

 species; also the native and cultivated spruces. 



Dendroctonus rufipennis* Kerby ; Fig. LVII1, b. This is next 

 in average size to the preceding species; varying in length from 

 67.5 mm., or .25 .30 inch; color light to dark reddish brown. 

 It is distinguished from terebrans by its smaller average size, 

 more slender form, narrower in front, and smoother body which 

 is usually thickly covered with long reddish hairs. If the pub- 

 lished records are based on correct identifications, this is a 

 most remarkable insect in its distribution. It has been record- 

 ed from Alaska, Utah, and Colorado in the western part of 

 North America, and from Anticosta, Pennsylvania and Florida 

 in the East, so that it may occur throughout North America 

 where coniferous trees are found. According to Prof. Peck, 1 it 

 is destructive to the spruce, and was associated with 

 a trouble in the spruce forest of New York in 1879, 

 similar to that caused by D. frontalis in West Virginia and 

 adjoining states in 1890 to '92. Dr. A. 8. Packard mentions 2 

 that he found it in its burrows under the bark of white pine at 

 Providence, R. L, and I have identified as this species, examples 

 received from Dr. J. A. Lintner who states that they were 

 found in the bark of the larch at Stockbridge, Mass. 3 I have 

 one example collected in the bark of a spruce stump near flor- 



1 28th and 30th Rep't N. Y. State Museum of Natural History. 



2 5th Rep't U. S. Ent. Com. p.722 under the name Polygraphus rufipennis, which was 

 .evidently meant for Dendroctonus rufipennis, since the latter species is described. 



3 Since the above was written much spruce timber has been reported as dying in 

 New Hampshire ani Pennsylvania from the attack of scolytids which are supposed to 

 be D. rufipennis, but those I have seen appear to belong to an undescribed species 

 closely allied to it, the work of which was described in a paper by Prof. C. M. Weed 

 and Mr. W. F. Fisk, read by the latter at the Boston meeting of the association of 

 Economic Entomologists and published in the proceedings. Bull 17, new series, U. S. 

 Dept. Agr. Div. Ent. pp 7-69, and is also referred to by Mr. Qhittenden in Bull. 18 of 

 the same Division, p 96, - ' 



