| 
BARK BEETLES OF THE GENUS HYLASTES i 
Although the rather long series shows considerable variation, it is 
by no means so great as in porculus and no greater than in several 
other species of the genus. 
Synonymy—The type of scabripennis Zimm., in the Leconte col- 
lection at Harvard University, was also studied and compared directly 
with Eichhoft’s cotypes of salebrosus. ‘This comparison showed only 
small differences, not of specific significance. 
Blandford (1898) agreed with Eichhoff and Schwarz (1896) that 
the two species are identical, but asserted the priority of Zimmer- 
mann’s name on the basis of a statement on the original wrapper of 
the Berliner Entomologische Zeitung that pages 177 to 312 were not 
published until March 1869. Apparently he was in error as to the 
pagination of the description in question, for 1t appears on page 146. 
In any event, proof of Eichhoff’s priority is found in Zimmerman’s 
own paper, for on page 149 he refers to Eichhoff’s description of 
tenuis which appeared in the same article immediately following that 
of salebrosus. 
The assertion of Leconte (1868, 1876) that scabripennis Zimm. is 
a synonym of porculus Er. is certainly based on a misinterpretation 
of Erichson’s description of the latter, as has been pointed out by 
Kichhoff and Schwarz (1896). 
HYLASTES SCOBINOSUS Eichhoff 
Hylastes scobinosus Hichhoff, 1868, Berlin. Ent. Ztschr. 12: 146; Chapuis, 1869, 
Synop. Scolyt., p. 17 (extract from Soc. Roy. des Sci. de Liége Mém. (2) 
3: 225, 1873) ; Leconte, 1876, Amer. Phil. Soc. Proce. 15: 389 (as synonym of 
cavernosus Zimm.) ; Hichhoff and Schwarz, 1896, U. S. Natl. Mus. Proc. 18: 606, 
607; Swaine, 1909, N. Y. State Mus. Bul. 134: 147; Swaine, 1918, Canada Dept. 
Agr. Ent. Branch Bul. 14 (2) : 78. 
Female.—Dark reddish brown, shining, 4.77 mm. long, about 2.6 times as long 
as wide; similar to salebrosus but with the pronotum widest near posterior 
margin. 
Frons rather broad between eyes, frontal rectangle almost exactly as wide as 
long; epistomal margin darker in color, somewhat liplike, with median lobe 
rather short, with distal edge broadly emarginate and broadly impressed or 
excavate in median area; epistoma reddish brown, rather widely and deeply 
impressed at each side of the elevated median carina, which extends to the 
rather weakly developed arcuate transverse impression; surface feebly shining 
to Subopaque, strongly granulate-punctate below, with punctures larger and 
interspaces rugose-granulate above; hairs fine, short, inconspicuous except on 
epistoma. Eye moderately granulate, short ovate, about twice as long as wide, 
widest above, inner margin entire. Antenna with first segment comprising about 
half of club. 
Pronotum about 1.05 times as long as wide, but appearing more slender; poste- 
rior outline nearly straight, posterior angles rounded; widest near posterior 
margin, with sides nearly straight and gradually converging on posterior five- 
sixths of length, then mcderately constricted to meet the broadly rounded anterior 
margin; surface brightly shining, with moderately small, deep, moderately spaced 
punctures, smaller, closer, and deeper than in salebrosus, smaller anteriorly ; 
median impunctate line feebly elevated on posterior two-thirds; disk subglabrous 
with inconspicuous short, fine hairs at sides and base. 
Hlytra wider than pronotum (64:55), about 1.62 times as long as wide, widest 
near base, with sides nearly straight and slightly tapering on anterior two-thirds, 
then arcuately narrowed and harrowly rounded behind; surface moderately 
shining; striae moderately impressed, more weakly than in salebrosus, and nar- 
rower, With punctures moderate in size, Shallow, sometimes separated by more 
than own diameters; interspaces wider than striae, convex, more strongly behind, 
rugose-asperate, with rugae near base often bridging striae between punctures: 
