20 



91. Sclerorinus regularis, n. sp. 



92. Sclerorinus convexus, Sloane, var. spenceri, n. var. — 



Among the specimens sent were a number which show 

 some variation, inter se, and which all differ from 

 the type of S. convexus in my own collection. I can 

 not regard these specimens as belonging to more than 

 one species, though as the only specimen I have 

 seen of S. convexus is the type, I cannot be certain 

 if they represent a distinct species or only a variety ; 

 apparently this is the species that Blackburn (Report 

 Horn Exped.) recorded as S. convexus. Under the 

 circumstances, I have thought it advisable to give 

 a varietal name to these specimens, and have adopted 

 the name which Blackburn had apparently originally 

 (a specimen in my collection is labelled "spenceri" in 

 Blackburn's handwriting) given them in honour of 

 Professor Baldwin Spencer. Below are given the 

 chief characters for differentiating the variety from 

 S. convexus : — 



cS . Larger than S. convexus, less parallel- 

 sided; head and rostrum as in type; prothorax 

 variable, in specimen selected for description 

 granules somewhat larger than in convexus and 

 somewhat abraded; elytra with nodules on inter- 

 stices larger, more elongate, much fewer in number 

 on the second and fourth, on the second ending 

 suddenly at declivity not extending down as gradu- 

 ally diminishing granules. 



Dim. — $ , 23 x 8 mm. ; 9 > 22 x 8 mm. 

 Hab. — Ouldea to Talarinna (R. T. Maurice), 

 North-west South Australia (Wells Exped., H. 

 Basedow), Deering Creek (Horn Exped.), Her- 

 mannsburg. None of the specimens show any signs 

 of clothing, though such is evident in S. convexus. 

 Two specimens differ in being larger, more con- 

 vex, and with rather coarser nodules. I cannot 

 regard them as specifically distinct. 



93. Sclerorinus insignis, Sloane. — Type, Elder Exped. 



94. Sclerorinus noctis, Sloane. — Type, Barrow Range, 



Elder Exped. 



I would refer these two species, originally 

 placed in Talaurinus, to Sclerorinus; they are 

 closely allied, but I believe distinct. How- 

 ever, it is impossible to speak absolutely on this 

 point, as they are of opposite sexes. 



95. ( ?) Talaurinus obscur us, Sloane. — Type, Elder Exped. 



Though Sloane regarded this species as closely allied 



