428 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
PHILHYDRUS SCUDDERI Wickham. 
Represented by one specimen, No. 2,436 M. C. Z. (No. 9,712 S. H. 
Seudder Coll.), slightly smaller than my type but exhibiting almost 
exactly the same proportions in length and breadth. It measures 
4.50 mm. in length and 2.25 mm. in width. 
Hyprosius Titan Wickham. 
One specimen, No. 2,437 M. C. Z. (No. 10,411 S. H. Scudder Coll.). 
SILPHIDAE. 
SILPHA BEUTENMUELLERI, sp. nov. 
Plate 1, fig. 3. 
Described from an elytron only, which is apparently a little broken 
at apex and much more so at base, but judging from the costae is 
approximately of its full original length. Sutural margin with well- 
defined bead, disk sharply tricostate, the costae nearly straight, 
slightly convergent apically, subequidistant, the inner separated from 
the suture by a distance markedly greater than the intercostal width. 
The outer costa, at middle, is about three fourths as far from the outer 
margin as from the suture, while exterior to it and separated from it 
by a space about equal to that between the suture and the inner costa 
is a deep groove extending the entire elytral length. Apex probably 
bluntly rounded. Punctuation well defined over nearly the entire 
surface, the punctures sharp and rather distant, finer at apex and 
(possibly on account of the state of preservation) not distinguishable 
exteriorly to the lateral groove. Length a trifle over 10 mm. 
The single specimen is without counterpart. 
Type.— No. 2,438 M. C. Z. Florissant, Col. (No. 5,111 S. H. Seudder 
Coll.). 
At first, I had intended to refer this elytron to Necrodes primaevus 
from these shales. In length, the elytra of the two differ only about 
1 mm., but the description of N. primaevus states that “except for the 
much shorter elytra it is difficult to separate this species by any tangi- 
ble characters from the living N. surinamensis.” It seems unlikely 
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