146 TERTIARY RHYNCHOPHOROUS COLEOPTERA. 
Tribe SPHENOPHORINT: 
Three species of this tribe have been discovered in the Tertiary deposits 
of Europe and four in America. All of the former, found at Oeningen and 
at Rott, have been referred to Sphenophorus. In America two of the species, 
from Florissant, belong to Seyphophorus, while each of the other two, one 
from Florissant and the other from the Roan mountains, is regarded as the 
type of a distmct genus. 
Table of the genera of Sphenophorini. 
Prothorax prolonged in front to form a hood-like covering to the head. .. . Sciabregma. 
Prothorax normal. : 
Elytra apically truncate, exposing a large pygidium; antennie of usual stout- 
TVS Se Scyphophorus. 
Elytra not apically truncate, the exposed pygidium small; antenne exceptionally 
small and slender ..... Rt SE MTS Bott Oryctorhinus. 
SCIABREGMA (oxa, Gpéyma), gen. noy. 
This name is proposed for what is certainly a remarkable form of Ca- 
landridee, or, indeed, of Rhynchophora, in which the upper anterior portion 
of the prothorax is produced to form an overarching frontal guard to the 
head, nearly or quite as long as the rest of the prothorax itself. There are 
many Rhynchophora, which, from the emargination of the sides of the 
prothorax to uncover the otherwise partly eclipsed eyes, appear, on a side 
view, to show a tendency to some forward projection of the uppér portion, 
but on viewing them above, nothing of the kind appears. Here, however, 
the front is prolonged to an excessive distance, and curves downward in 
addition, thoroughly protecting the head, but in no way interfering with 
the drooping beak. A similar development is seen in some exotic Curcu- 
lionidee, as Plagycorynus, Anchonus, and Pileophorus. 
It appears to resemble most the Sphenophorini, though the needed 
characteristic parts to determine this are not preserved. The head is short, 
the beak gently curved, nearly or quite as long as the body of the prothorax, 
slender, growing gradually stouter at the base; the eyes are small and 
circular. The prothorax, including the frontal projection, is coarsely rugose, 
