SOOLYTID.K— SCOLYTIN.E— II Y IJ \IV. 1 X I. 159 



IIYLKSIXUS FalH-ic-ius. 



An abmidiint "•cuiis wirli thii-fy or forty sj)ecies widelv (listril)iitc<l, 

 witli nlxiiit halt' a dozen species fdinid in tlie I'nitcd States. 'Tliree siieclcs 

 have been found fossil in Europe, two at Ai.\ and one at liruustatt, and a 

 single species in America at Florissant. The Ai.\ species are not s(» far 

 away from ours, Ijut the species here described is referred to this <ienu>: 

 only on account of its general appearance, though the great size of the 

 head alone would seem properly to exclude it. 



HyLESINUS f:XTRACTUS. 



PI. I, Fig. 22. 



The head is large, tumid, nearly lialf as large as the i)rothorax, smooth. 

 Prothorax rectangular as seen lateral!}-, a fourth higher than long, the sur- 

 face clo.sely and rather coarsely granular. Elyti-a more than twice as lono- 

 a.s the prothorax, the outer margin Hexed and margined ])reciselY as in //. 

 aculeafus Say, the surface less coarsely granular tlian tlie prothorax, with 

 faint signs of longitudinal stri;e, not shown in the figure. 



Length, 2-7"""; height, 1 •2'°™; length of tegnnna, 1-8""". 



Florissant, Colorado. One specimen. No. 5647. 



IIYLASTK8 Erichson. 



A genus almost confined to boreal regions in the two worhls, and of 

 which we have nine species in the United States and Canada, 'i'he fos.sil 

 species placed here hesitatingly is known only l)y the burrows of the insect 

 under the bark of junipei'. 



HyLASTES ? SQUALIDENS. 



Scolyddte up., Scudd., Can. Knt.. xviii, I!>4-l!)f> (18S6). 



HyhiKtes f nqnaUdenx, Scudd., Tert. Ins. N. A., 468-4«9, PI. I, Fips. 23-25 (1800); 

 Coiitr. Can. Pal. ii, 2.S-;!0 (1892). 



The borings of a l)eetle in a twig of juniper found in interglacial l)ed.s. 

 No further light has been thrown upon them than is given in my Tertiary 

 Insects. 



Near Scarlxao, lake Ontario, CJanada. 



