564 NOTES ON AUSTRALIAN COLEOPTERA, 



longer than wide, and to be "straight and parallel on the sides in 

 front," — whereas in M. sinuaticollis the sides are quite strongly- 

 arched immediately behind the anterior angles and then are in- 

 curved hindward until they diverge again close to the base where 

 they run into the produced hind angles. The prothorax is at its 

 widest (disregarding the actual hind angles) immediately behind 

 the front margin. From M. affinis this species differs in the shape 

 of the prothorax (which in the former is almost straight and 

 parallel on the sides), — in the less elongate hind angles of the' 

 same (in M. affinis these are produced in a remarkably long and 

 slender lobe), in the 3rd joint of the antenna3 not being longer 

 than the 2nd and in the anterior margin of the elytra being much 

 less strongly arched forward on either side of the scutellura. 



W. Australia ; Israelite Bay, — from Mr. C. French. 



TENEBRIONID/E. 

 Hypocilibe. 



I have before me ten examples from various localities apparently 

 belonging to this genus and Onosterrlms. Hyiwcilihe and Ono- 

 sterrlius seem to be very closely allied and I find considerable 

 difficulty in drawing the line between the two genera. Mr. Bates 

 distinguishes the former from the latter by its more expanded 

 and less convex form, the more deeply sulcate gula, the large 

 cultriform joint of the maxillary palpi (the same in Onosterrhus 

 being "triangulate"), "etc." Looking through the description to 

 find what "etc." refers to I can only discover the following, — that 

 the tooth of the submentum is larger in Hyjiocilibe, and the sides 

 of the epistoma more parallel. Referring to the descriptions of 

 the species that have been attributed by the author of Hypocilibe 

 (or recognised by him as belonging) to either genus, it would seem 

 that the species of Onosterrhus are longer than wide while in 

 Hyjjocilibe the proportions are reversed. 



When I endeavour to apply these observations to the specimens 

 before me I find that in four of them the length and width are 



