FASCICULI MALATENSES 
287 
H. dominus are extant in collections. M. Rene Oberthur is of opinion that 
H. mouhotus and H. dominus may prove to be distinct species. If so, we have 
a case that as regards variation is very remarkable ; because the females, 
small males, and moderate males of the two forms (or species) are very much 
alike, while the large males of the two are not similar. M. Oberthur 
has specimens that he considers to be H. dominus from Assam, Upper Burma, 
Rungpore, and Trichinopoly, these being some of the examples I have 
previously mentioned. This suggests a dilferent distribution for the two 
forms, H. dominus occurring on the continent of India, and H. mouhotus in 
Cochin China, Siam, and the Malay States. If this difference in distribution 
should prove to be real (and not due merely to the small number of 
specimens that have been collected), it will be strong evidence in support of 
the distinctness of the two forms. Perhaps the life-histories may elucidate 
the question, but as to this very little is, I believe, known. 
If it should prove that there are two species, the evidence goes to show 
that the abrupt variety that I have described in H. mouhotus does not occur 
in H, dominus. 
C 
Heliocopris mouhotus $ Scale : -i 
A = major-form. B = minor form. C = third form. 
