582 Mr. D. Sharp and Mr. F. Muir on the Comparative 



Anomala, and he finds that the lateral lobes develop on the 

 ventral aspect. It follows from this that the oo-ientation we 

 have adoj^ted 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, 

 etc. 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. 



JEucranium lacordairei. 



Is similar to AUxichus 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. 



