BY WILLIAM MACLEAY, F.L.S. 
907 
140. Bolboceras hippopus, n.sp. 
This species is very like the preceding, but differs in being 
much smallei’, in the more elongate horn on the vertex, in the 
transverse line on the clypeal suture being a little sinuate, in the 
thorax, which has in the front and middle a deep well-formed 
horse-shoe-shaped excavation, deeply impressed on the median 
line, with a short laterally compressed horn on each side, and in 
the elytra being more sti’ongly striate-punctate. 
Long. 6, lat. 4^ lines. 
Sub-Family TROGIDES. 
141. Trox dilaticollis, n.sp. 
Black, very opaque, squamose. Head a little triangular in 
front, with two minute transverse tubercles on the forehead. 
Thorax transverse, much dilated and reflected at the sides with a 
notch about the middle, and a large excised emargination from 
that to the base, which is bisinuate and not wider than the apex ; 
the discal ridges on the thorax are in three pairs and nitid ; the 
pair nearest the middle nearly reach the base and bulge apart a 
little in the middle, the next pair are divided in the middle and 
continuous at base and apex, the outer pair appear as a short ridge 
at the base with a very short one above, not in the same line. 
Elytra of the width of the thorax at the base and four times the 
length, ampliated and rounded towards and at the apex, with ten 
rows of well-marked equi-distant punctures, separated alternately 
by very fine ridges, sub-costate near the base and of elongate 
minute tufted tubercles behind, and distant minute tubercles 
on flat interstices. 
Long. 8 lines. 
142. Trox alatus, n.sp. 
Black, very opaque, sparingly stpiamose. Head with two 
.small tubercles in front, the apex of the clypeus rounded. 
Thorax very transverse, the sides entire and a little rounded, very 
broadly dilated, flat and reflected, much narrowed behind in a 
