19 



in the females, which are, as a rule, larger and more 

 coarsely tuberculate than the males. As with most 

 of the other species of the adelaidce group, the species 

 shows a tendency to merge with the species above 

 and below it in the scale of magnitude and tubercular 

 development. While some specimens show a decided 

 approach to S. vittatus, others are hardly separable 

 from the following species, and there are intermediate 

 forms. 



79. Sclerorinus acuminatus, Macl. — South Australia. 



Specimens compared with type of acuminatus agree 

 also fairly closely with specimens of sordidus, except 

 that they are smaller and have rather smaller 

 tubercles. The fifth interstice is practically obsolete, 

 while in sordidus it is as a rule fairly definite, though 

 some specimens show a tendency towards obliteration. 



80. Sclerorinus tristis, Boisd. — Tasmania. Specimens of 



a Sclerorinus from Tasmania without doubt belong 

 to this species. 



81. Sclerorinus asper, Macl. — South Australia. Specimens 



from South Australia agree with the type. 



82. Sclerorinus howitti, Macl. — Victoria. A 9 f rom 



Victoria agrees with the type. It is very doubtful 

 if S. asper and S. howitti can be maintained as dis- 

 tinct from S. tristis; I myself do not think that they 

 can. S. acuminatus and S. obliteratus are also ex- 

 tremely doubtfully distinct, though there seems 

 more justification for their separation. 



83. Sclerorinus obliteratus, Macl. ( ?) — Australia. A <$ 



without locality agrees fairly closely with the type, 

 which is, however, a 9 • 



84. Sclerorinus, sp. — Victoria: Mount Buffalo. Close to 



S. obliteratus, but possibly distinct; both specimens 

 are, however, males. 



85. Sclerorinus, sp. ( ?) — A <S from Aldgate probably 



represents a new species of this group. 



86. Sclerorinus, sp. ( ?) — A <$ from Ballarat has the 



sculpture almost obliterated ; it is possibly distinct. 



87. Sclerorinus, sp. ( ?) — Victoria: Nelson (Blackburn). 



Close to S. obliteratus, Macl., but probably distinct. 



88. Sclerorinus irregularis, Macl. — South Australia : 



Square Waterhole. A single 9 > in general appear- 

 ance closely resembling S. sordidus. 



89. Sclerorinus, sp. ( ?) — Kangaroo Island. A single 



9 greatly abraded, but apparently belonging to 

 an undescribed species allied to S. sordidus. 

 SO. Sclerorinus neglectus, n. sp. 



