COLEOPTEEA— PTINIDJE. 491 



"I have been really at a loss to know to what genus to refer these 

 remains. They were at one time considered to be Saprinus, but the num- 

 ber of the striae and their character forbid such a reterence. The species 

 seems to have been rather smaller than our Choeridium histeroides, but 

 undoubtedly resembled it in form. I Avould have referred the remains to 

 Canthon near perplexus, but the thorax is by no means that of the genus." 

 Horn, loc cit. 



The thorax of the specimen appears to have been broken off before 

 reaching me, as the description given by Dr. Horn is inapplicable to any of 

 the fragments before me. 



The pleuraj are not only "longitudinally finely strigose," but also 

 delicately striate in the same direction. Aside from the punctuation the 

 upper surface of the thorax is smooth. 



The outer discal stria of the elytra is very widely separated at base 

 from the submarginal stria which runs closely parallel to the outer border. 



Length of elytron, S.B"™; breadth of same, 2'"'". 



Bone caves of Port Kennedy, Pennsylvania. 



Family PTINID^E Leach. 

 ANOBIUM Fabricius. 



AnOBIUM 1 OVALE. 



PL 8, Fig. 1. 



Anoiiumt ovale Scndd., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 762-763 (1878). 



The insect evidently appertains to a distinct genus of Ptinidse, in which 

 the sides of the body are not parallel, but the body tapers posteriorly much, 

 though not to the same extent, as anteriorly. It is, however, most nearly 

 allied to Anobium, in which it is provisionally placed. It is about as large 

 as Endecatomus rugosus LeC. The prothorax, viewed from above,, is 

 bluntly conical, tapering rapidly. The body is broadest just behind the 

 base of the elytra, and tapers slightly at first, more rapidly afterward, and 

 is rounded posteriorly ; thus the whole body has an ovate outline. Tlie 

 pronotum is minutely and verj^ profusely punctulate in black, the punctures 

 being slightly elongated longitudinally, and appears to have been covered 

 profusely with slight asperities or a coarse pile (much perhaps as in Ende- 

 catomus rugosus). The elytra, which are nearly three times as long as 



