the Genus Dipelicus. 533 
@. Hornonthe head short, triangular. Thorax convex, 
unarmed; in front transversely rugulose-punctate, sides 
less so; behind thickly and strongly punctured. Elytra 
with the striz indistinct, interstices less strongly punc- 
tured. Propygidium less produced than in the male. 
Long. 18-194 lines. 
Hab. Java, China. 
2. Dipelicus (Geotrupes) Geryon, Fabr. 
(Figured by Olivier, Entomol. I. 3, Pl. 24, fig. 208.) 
3. The specimen of this insect before me, labelled 
“Java,” differs considerably from D. Cantori in the 
armature of the thorax, as well as in form. It is ofa 
chestnut-brown. ‘The horn on the head is slightly more 
recurved than in D. Cantori. The thorax is shghtly an- 
gular on the sides; the anterior angles are shghtly pro- 
duced, acute; the posterior are less rounded. The 
excavation of the thorax is much greater ; the posterior 
lobe is proportionally smaller, its posterior mcision is 
almost circular; the fore part of the lobe is furnished 
with a single compressed projecting horn, contracted 
at the apical half; the horns at the anterior angles are 
compressed, broad, projecting forward, truncate at the 
apex, and much prolonged posteriorly into a point, the 
front angle with a small perpendicular projection. The 
elytra have the sides more parallel than in D. Cantori. 
I have not yet seen the female of this insect. 
EXPLANATION OF PLATE XXVII. 
Fig. 1. Damaster awricollis, C. O. Waterh. (ante, p. 529). 
2. Dipelicus Cantori, Hope, ¢. 
3. Dipelicus Cantori, side view of upper portion of 
the head and thorax of ¢. 
4. Dipelicus Geryon, Fabr., side view of upper portion 
of the head and thorax of ¢. 
