582. Mr. D. Sharp and Mr. F. Muir on the Comparative 
Anomala, and he finds that the lateral lobes develop on the 
ventral aspect. Jt follows from this that the orientation we 
have adopted in the following sketch of this family is incorrect 
and should be reversed, at any rate as regards the terms 
dorsal and ventral applied to the aedeagus. 
Ateuchus cicatricosus. 
The aedeagus is of the same type as Phanaeus and Heliocopris, 
ete. It is however strongly chitinised and the lateral lobes are more 
complex and irregular in form. The internal sac is very remark- 
able ; it is large and complex in shape ; at the apex are two long, 
curved spines closely pressed against one another (looking like one) ; 
a little beyond is a small, curved bifurcate, spine-like, chitinous 
plate ; towards the base is a shallowly concave chitinous plate 
from the apical end of which arises a strong chitinous piece giving 
off a dozen thin, flattened, curved lamella-like spines which lie 
together like the lamellae of certain antennae. 
Eucranium lacordairet. 
Is similar to Ateuchus cicatricosus in type, but the sac has only 
chitinous plates for armature. 
Phanaeus lugens. 
Median lobe small with chitinous support at base, prolonged 
into two short, broad, median struts. Lateral lobes small, connected 
together by membrane to near their tips. Basal-piece large, strongly 
chitinous, tubular with a large basal opening. Internal sac large, 
complex, with chitinous structures, one being a broad, curved spine 
towards apex. 
Catharsius molossus. 
Median lobe small with a chitinous support continuing as two 
short median struts for the support of muscles. Lateral lobes large, 
fairly narrow and curved, joined together on dorsal and ventral 
side of membrane which folds in when lateral lobes are brought 
together ; this forms a tube in which the median lobe is situated 
and hidden. Basal-piece large, forming a chitinous tube, slightly 
bent near base, with basal opening on ventral face. Internal sac 
large with complex armature; near the base there is a shallow 
wide diverticulum, about the middle a wide curved chitinous 
plate, and towards the apex two thin chitinous spines arising from 
near the opening of the ejaculatory duct ; a large spine-shape plate 
supports the membrane at the base of the two spines. 
