BY THOMAS G. SLOANE. 59 



The following is a table of the species. 

 a. Lateral border of prothorax not inter- 

 rupted posteriorly, reaching basal , 

 angles. A single setigerous punc- 

 ture above each eye Australian species. 



Sides of prothorax gently nar- 

 i-owed behind, not emarginate 



before basal angles P. montoriMm, Casteln. 



Sides of prothorax sharply nar- 

 rowed behind, emarginate before 



basal angles P. conco^or, Sloane. 



aa. Lateral border of prothorax interrupted 

 posteriorly, not reaching basal angles. 

 Several setigerous punctures above 

 each eye, placed in an elongate 

 fovea, one or more punctures on 



vertex outside this fovea Tasmanian species. 



Elytra very finely striate, inter- 

 stices flat P. carenoides, White. 



Elytra strongly striate, interstices 



convex near sides P. sulcipenne, Bates. 



The two Tasmanian species, P. carenoides, White, and P. siclci- 

 penne, Bates, resemble each other in the very large head with 

 long jaws, and in the shape of the prothorax, which is broadest 

 towards the front and greatly constricted near the base, with 

 broad lateral margins interrupted before the base. In all these 

 points they diiFer from the two Victorian species, P. montanum, 

 Casteln., and P. concolor, SI., which have the head moderate in 

 size, the jaws not very elongate, and the prothorax more gradually 

 narrowed behind, with the lateral margins narrow and not 

 interrupted before the base. 



The Tasmanian species are said to be without the strong 

 triangular projection on the lower side of the tibiae in the ^ ; but 

 in P. montanum, Casteln., (the only species of which I am sure I 

 know both sexes), we find this feature more prominent than even 

 in the described species of Lychnus, to which genus it was sup- 



