LeConte.] 626 [April 18, 
tured in rows, interspaces with rows of very short stout bristles. Eyes 
extending to the under surface of the head, not widely but distinctly sep- 
arated beneath. Club of antennz with broadly curved sutures. Length 
1.7 mm. ; .07 inch. 
3’. Scape of antenne fringed with very long hair; (front not visible, 
the head being retracted). 
Detroit ; onespecimen. To be placed in the table, (Rhynch. 
368), before M. rudis. 
77. Micracis asperulus. Slender, cylindrical, black, entirely 
opaque. Head not concave, scarcely punctured. Prothorax more strongly 
asperate in front than in the preceding, scarcely punctured behind, sprin- 
kled with small yellowish scale-like hairs. Elytra obsoletely _ striate, 
densely rugosely punctured, interspaces with rows of very short stout 
bristles as in M. opacicollis. Eyes very narrowly separated beneath. An- 
tenne ferruginous, club with broadly curved sutures. Legs ferruginous. 
Length 1.7 mm. ; .07 inch. 
3’. Scape of antenne fringed with very long hair. 
Detroit ; in dead oak twigs. Of the same size and form as 
the preceding, but quite different in sculpture. 
78. Scolytus unispinosus Lec. Rhynch. 372. 
Marquette, Lake Superior; one specimen. This differs 
from the two specimens from Oregon upon which the species 
was established, by the punctures of the elytra being not so 
small, and by the spine of the first ventral segment being 
much less developed, becoming in fact a small tubercle; the 
elytra are fringed with brown. I consider none of these as 
specific characters. 
79. Scolytus rugulosus Ratzcburg, Ins. i, 230; pl. x. f. 10. 
This isa suitable opportunity to notice the introduction 
of this European species into the United States. I have re- 
ceived specimens from Elmira, N. Y., where it attacks peach 
trees. According to Ratzeburg it is rare inGermany, but is 
found upon plum and apple trees. 
80. Choragus Harrisii. Elongate-oval, sub-cylindrical, blackish- 
brown, shining, finely pubescent. Prothorax finely less densely punc- 
tured, not opaque ; elytra with deep coarsely punctured strix, interspaces 
not wider than the stris, scarcely punctulate. Length1.2 mm.; .05 inch. | 
Detroit ; August ; one specimen. Differs from our other 
two species by being more distinctly (though very finely) 
pubescent and by neither the prothorax nor elytra being 
Opaque. 
