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XXII. Note on w Cenus of Dynastid-Lamellicorns 
belonging to the family Pimelopide. By Cnas. O. 
WATERHOUSE. 
| Read 4th March, 1867. ] 
Many years since Mr. Hope founded a genus of 
Pimelopide, which he called Dipelicus, upon an insect 
the male of which was then unknown. As I have now 
before me both males and females, I have thought it 
advisable, in addition to describme the male, to re-cha- 
racterize the genus, as some doubts have been enter- 
tained as to its proper position, on account of the imper- 
fect description given of it by Mr. Hope. 
Genus Drprticus, Hope. 
(Trans. Ent. Soc. iv. 7.) 
Mentum subparallel, very sightly contracted in front, 
and rounded. Maxille on the inner side tridentate, the 
apical tooth bifid, the basal one trifid. Apical joint of 
the labial palpi very large, securiform, deeply impressed 
on the front; maxillary palpi of the common form. Man- 
dibles bluntly bidentate on the outside, deeply impressed 
on the mner side, unarmed. Head triangular in front, 
furnished with an elongate (¢), or triangular (2), 
horn. Antenne ten-jomted. Thorax ample, sides 
rounded, posterior angles obtuse, with a large central 
lobe at the base. LElytra oblong, parallel, each with 
four longitudinal striz, formed of double rows of 
punctures, sometimes very indistinct. Legs very ro- 
bust, the anterior tibie armed with three teeth on 
the outside, the spur on the mner side long; posterior 
tibiz very short, with two ciliated carinz on the out- 
side, truncate, very finely denticulate and ciliated 
at the apex; anterior tarsi lnear, the four posterior 
with the basal jomt much dilated, notched above near the 
apex; spurs to the posterior tibiz much enlarged. Propygi- 
dium triangularly produced over the pygidium.  Stridu- 
latmeg organs situated on the middle of the propygidium. 
Mesothoracic epimera visible above. 
The genus Dipelicus has close relationship with Horo- 
notus. The parts of the mouth are the same in structure, 
except the mentum, which, in Horonotus, is contracted in 
front, the labium being truncate, and the apical joint of 
TR. ENT. SOC. THIRD SERIES, VOL. V. PART VII.—DEC. 1867, 
