664 



FAMILY IV. SCOLYTID.E. 



24 and August 10. The European species fra acini has similar 

 habits, the adults causing, according to Reitter, a growth on the 

 bark by their nibbling, known as "Riudeurosen" (bark roses). 



1073 (9164). HYLESINUS FASCIATUS Lee., 1868, 170. 



Elliptical, convex. Brownish-black, slightly pubescent, densely cov- 

 ered with black opaque scales, fasciate with ashy as described below. An- 

 tennas with club one-half longer than wide, regularly oval, less acute than 

 usual, basal part less pubescent and more shining. Head concave, with a 

 narrow, polished median line. Prothorax twice as wide as long, strongly 

 narrowed in front, broadly rounded on the sides, near base and apex with 

 bands of pale scales and hairs, the hinder one broadly interrupted at middle. 

 Elytra with band before middle consisting of a large sutural spot and 

 some smaller ones toward sides, a narrow, nearly complete band behind 

 middle, composed of pale ashy scales; tip with a few ashy scales; strife 

 deep, punctured. Length 1.5 mm. 



Crawford Co., Ind., rare; June 26. Clementon, N. J., May 20, 

 infesting young shoots of healthy white ash. District of Colum- 

 bia, rare, infesting twigs of Fmxinus. Described from York Co., 

 Pa. 



II. HYLASTINUS Bedel, 1888. (Derivative of Hylastes.} 

 Antennae inserted at a distance from the eyes, the scrobes not 

 reaching their front margin, second interspace over the deep 

 side furrows of elytra towards the apex toothed ; side pieces of 

 middle and hind sterna thickly whitish pubescent; elytra! inter- 

 vals with rows of setre but at most sparingly pubescent; thorax 

 almost glabrous, punctate without rugre, the elevation at base of 

 elytra feebly arcuate. Contains one species, variously placed in 

 Hylesinus and Hylastes, but considered by Reitter (1913) to 

 present characters of sufficient importance to justify its generic 

 separation. 



1074 (11,255). HYLASTINUS OBSCURUS Marsh., 1802, 57. 



Small, short, cylindrical. Dark brown. Beak broad, short but evident. 

 Antennae inserted in deep grooves at tip of 

 beak, funicle 7-jointed, club 4-jointed, loose, 

 first two joints large, equal, the last two smaller. 

 Head visible from above. Thorax irregularly 

 punctate with a trace of a middle line without tu- 

 bercles or teeth. Elytra with deep strias of punc- 

 tures, intervals with a single row of setse, declivity 

 gradually oblique without teeth or tubercles, basal 

 margin dentate, arcuate either side of scutellum. 

 Front coxse widely separated by a. prolongation of 

 prosternum; tibiaa all dentate on outer margin. 

 Length 2.2 2.5 mm. (Fig. 154.) 



Fi ( g After 4 ' Forces) 7 ' Marion Co., Ind., scarce; April 26. A Eu- 



ropean insect, reported as destructively abun- 



