146 GEO. H. HORN, M. D. 



This species was obtained by Mr. Ulke from the Hudson's Bay 

 Region. 



PITYOPHAGUS, Shuck. 



P. rufipeniiis, n. sp. — Sub-cylindrical, black, shining, elytra rufous. 

 Head convex, black, moderately shining, coarsely but sparsely punctured, 

 sides behind the eyes very slightly divergent, then feebly narrowed at base. 

 Eyes small, round, inconspicuous. Antennse rufous. Thorax black, shining, 

 punctured similarly to the head, subquadrate, slightly longer than wide, sides 

 very feebly arcuate, apex truncate, angles slightly prominent, base broadly 

 rounded. Elytra as long as head and thorax, parallel, apex truncate, base 

 slightly broader than thorax; humeri rectangular, moderately prominent; 

 surface rather densely, but not regularly punctured, sutural stria obliterated 

 at basal third ; color rufous. Pygidiutn black, densely punctured and con- 

 cave. Body beneath black, shining, sparsely punctured. Legs rufous. Length 

 .26 inch ; 6.5 mm. 



Similar in form to P. cej)halotes, Lee., but larger and differing by 

 the more fine punctuation of the elytra as well as in color. 



Two specimens before me, one in my cabinet from Oregon and 

 another in the cabinet of Dr. LeConte, collected by the Messrs. 

 Matthews in Vancouver. 



DERETAPHRUS, Newm. 



D. oregonensis, n. sp. — Black, sub-opaque, elongate, elytra subcylin- 

 drical. Head black, moderately shining, punctulate. Antennae piceous, tip of 

 club paler. Thorax elongate obcordate, one-fourth longer than wide, sides in 

 front rounded, then parallel, finally sinuate to the hind angle; base scarcely 

 half as wide as length of thorax; surface convex, sparsely punctured with un- 

 equal punctures, median line very deeply impressed at basal three-fourths, im- 

 pression divided by transverse ridge at anterior third. Elytra one-half longer 

 than head and thorax, subcylindrical, parallel, at base slightly narrowed, 

 humeri moderately prominent anteriorly, base emarginate ; surface with nine 

 rows of large deeply impressed punctures, the ninth row obsolete at tip, the 

 intervals between rows 3 — 1, 5—6, 7 — 8, 8—9, elevated costiform, the first two 

 and last two costee confluent with each other at apex. Body beneath black, 

 more shining than the upper surface, sparsely punctulate. Legs rufous. 

 Length .46 inch ; 11.5 mm. 



This is one of the largest species of the genus, until now not known 

 in our fauna. A specimen was received several years since from Cal- 

 ifornia, but from a source whence Australian species had been sent, 

 and little credit was therefore given to the authenticity of the locality, 

 especially as all the known species were Australian. Lately, however, 

 another has been attained free from any suspicion of error, and I have 

 therefore ventured to name it. Deretaphrus has place with the 

 Bothriderini of the family Colydiid^E. 



The specimens before me in my own and Dr. LeConte's cabinet are 



