48 NATURAL History BULLETIN. 
T'HEsIUM, Casey. ° 
(Apothinus Sharp (?)). 
Form comparatively short and broad, depressed, the eyes 
large, the disk of the vertex narrowed on the frontal margin; 
the antennal joints from the sixth upward gradually wider; 
prothorax much wider than the head, widest before the middle, 
and sinuate toward the base, the lateral margin crenate; 
elytral disk broad, nearly quadrate; abdomen broad, margin 
broadly retuse, the fourth segment not prolonged; the pros- 
ternum is carinate. 
T. cavirrons, Lec. Color uniform reddish-brown or 
darker, legs, antenna, and palpi, paler. Pubescence pale, 
abundant. Lengtho.8 mm. Plate XI., Fig. 104. 
flead small, broader than long, eyes large, coarsely facetted, 
behind the middle, therefore, the tempora are short, nearly 
transverse; occiput convex, not impressed, and, in a line behind 
the eyes, twice as wide as the frontal margin; vertex abruptly 
elevated above the eyes, with two small pubescent fovee in a 
line through the middle of the eyes, connected by a broadly 
impressed sulcus, parallel to the lateral margin of the disk, 
shallow near the fovea and very deep behind the frontal mar- 
gin; the surface between the fovee has an impressed puncture 
in the center. Supra-antennal tumefactions strong, externally 
angulated, the frontal connecting ridge fine and sharp; clypeus 
and labrum prominent, the latter very broad, with the anterior 
margin straight, and narrowed at its base. Antenne as long 
as the head and prothorax together, first and second joints 
sub-cylindrical, equal in width; third to fifth gradually smaller, 
obconical; sixth to ninth sub-equal in length, rapidly increas- 
ing in width; the ninth two and one-half times wider than 
long; tenth nearly as long as the two preceding together and 
twice as wide as long; the last, large, ovate, truncate at its 
base, as long as the three preceding joints together, The last 
palpal joint is rather long, of the same form as the last anten- 
nal joint. Prothorax widest just before the middle where it is 
