584 Mr. D. Sharp and Mr. F. Muir on the Comparati'ce 



dorsal part extending backwards, bent and slightly flattened. 

 Internal sac large, its surface covered with chitinous spines, those in 

 the middle being largest and pointed. 



ApJwdius senegalensis. 



Differs but little from the foregoing. 



Obs. — If the two Ajjhodins examined by us are charac- 

 teristic of the group, it is distinguished from Coprinae by 

 the more flat, less cylindric, base of the tambour. 



Millingenia fossor. 



Median lobe small but well chitinised, without median struts. 

 Lateral lobes slightly longer and pointed, embracing the base of the 

 median lobe but not entirely concealing it, meeting at their base on 

 the dorsal side and connected by a thin strip of chitin on the ventral. 

 The basal-piece large but mostly semi-chitinous. Internal sac 

 medium size with a thin triangular chitinous plate on the dorsal side 

 near base and a strong chitin knob on ventral side near base. This 

 appears to be near to Gloeotvs. Not correctly placed in Aphodiinae. 



Clocotus simmtus (PL XLIV figs. 15 and 15«). 



Median lobe small, of a semi-chitinous nature, but quite distinct ; 

 median orifice on ventral side near tip. Lateral lobes little longer than 

 median lobe, not quite meeting together at their bases, embracing the 

 basal -lateral portion of median lobe. Basal-piece very large, forming 

 a curved chitinous sclerite on the ventral side, a large membrane {m) 

 separating it from the lateral lobes, except at the lateral corners 

 where the sclerite is prolonged to the lateral lobes (o). Internal 

 sac very large and complex, bearing short hairs, but no chitinous 

 armature. 



The fact that the basal-piece forms a sclerite on the ventral side 

 of the aedeagus appears to point to a difference between it and the 

 Coprinae, but we must recall what we have previously said about 

 the dorso- ventral aspect. 



Cloeotus rugiceps. 



Similar to G. sinuatus, but the median lobe is smaller, more 

 membranous and more covered by the lateral lobes. Internal sac 

 large and complex, bearing hairs that graduate in certain spots into 

 short stout spines. 



Clocotus appears to form a connection between the 

 Trogidae, in which the median lobe is well developed and 



