108 Dr. H. Eltringham on Specific and 



H. aulicus, Weym. 



I have only had one example of this species to examine. 

 Its clasper is shown on PL XV. It has the dense hairy tuft 

 of the novatus group, and differs little from that of aristiona 

 tarapotensis. The pattern of the wings is also so similar 

 that it seems certain that they are the same species. 



All the above seem to constitute a group of forms which 

 cannot be constantly distinguished by the genitalia. Before 

 passing to those species which have claspers of the ismenius 

 type there are a few forms which must be separately 

 considered. 



H. " silvana " robigus, Weym. ; H. " silvana " ethra, Hiibn. 



The form robigus occurs in Brazil (Espiritu Santo, Rio 

 de Janeiro, Minas Geraes, etc.). The clasper is shown on 

 PI. XV. It cannot be placed in the narcaea group owing 

 to its form. It is less densely tufted than those of the 

 novatus group. Two preparations show much the same 

 structure. It is certainly incorrectly placed in being 

 associated with silvana. Apart from the difference in 

 the tuft, the form of the clasper suggests an affinity 

 with aristiona, and further reasons for placing it in that 

 association will be given later. 



The clasper of "silvana" ethra shown on PI. XV is 

 barely distinguishable from that of " silvana " robigus. 

 It is rather more densely tufted, but must, I think, be 

 regarded as conspecific with robigus and probably with 

 aristiona and novatus. 



H. vetustus, Butl. 

 The typical form occurs in British Guiana and the form 

 metellus, Weym., in N. Brazil. The clasper (PI. XV) is of 

 a curiously irregular shape. Except for the dense tuft of 

 bristles it might well be a form of numatus. 



H. sergestus, Weym. 



This species occurs at Tarapoto in Peru. I have had 

 but one example to examine, and the clasper is shown on 

 PI. XV. If its well-rounded and tufted form is constant 

 it may well be regarded as definitely distinct. 



H. atthis, Doubl. 



This species, which has become so profoundly modified 

 in mimicry of Tithorea pavonii, occurs in Ecuador. Though 



