860 NEW YORK STATE MUSEUM 
213 Locust borer, Cyllene robiniae Forst. A serious 
enemy of locusttrees. | 
Chief accessible article: Hopkins, A. D. W. Va. agric. exp. ‘sta. 
Bul. 16:91 p: 88. 
214 Ribbed Rhagium, Rhagium lineatum Oliv. Works 
under dead or dying pine bark. 
215 White pine weevil, Pissodes strobi Peck. Injures 
terminal shoots of pine. 
216 Willow snout beetle, Cryptorhynchus lapathi 
Linn. An introduced borer which injures poplar and willow. - 
Bark and wood borers, Scolytids 
General works on the group 
Hopkins, A. D. Catalogue of West Virginia Scolytidae and their 
enemies. W. Va. agric. exp. sta. Bul. 31. ’98. p. 121-68. 
Hubbard, H. G. U.S. dep’t agric. div. ent. Bul. 7, n.s. 97. p. 9-30. 
217 Monarthrum mali Fitch. Attacks beech, apple. 
Chief accessible article: Fitch, Asa. Noxious and beneficial — 
insects of New York. .3d rep’t, ’56. p. 8-9. 
218 Gnathotrichus “materia: Fitch, Attacks 
white and pitch pine. 
219 Pityogenes gp. Attacks white pine. 
220 Pityophthorus minutissimus Zimm. A bark- 
miner of red oak. | 
221 Pityophthorus sp. Working in dead limbs of black 
birch. | 
222 Xyloterus politus Say. Attacks beech and soft 
maple. 
223 X. bivittatus Kirby. Attacks balsam stumps. 
224 Cryphalus striatus Mann. Attacks balsam, 
spruce and hemlock. j | 
225 Dryocoetes eichhoffi Hopk. Taken under bark 
of yellow birch stump. os 
226 Dryocoetes sp. Working in bark of spruce logs. 
227 Xylocleptes sp. Boring in partly eee twigs of 
Sugar maple. 
228 Tomicus Palla eeapne Germ. Abundant in 
thicker bark of dying white and pitch pines. 
