5 16 CASEY 



pronounced in either case, but coiifusiis is much more depressed 

 and differs greatly in the form of the very deep basal excava- 

 tions of the pronotum ; is is probably not more than subgener- 

 ically different however. 



* E7nmenastus igualensis is a perfectly typical member of the 

 genus JEmfnem'des. It is almost as large as -punctatus Lee, 

 but rather more abbreviated, duller in lustre, with much finer 

 punctures throughout and with decidedly less prominent eyes, 

 the resemblance in general habitus, as well as in the essential 

 characters of the genus, is complete. 



Ernincnastus constrictiis^ from the Pacific coast State of Guer- 

 rero, must form a special genus, apparently allied to Ar?nalia, 

 but differing in the form of the front, which is bisinuate, with the 

 very short median lobe subangularly rounded and feebly serru- 

 late and having the left mandible more distinctly toothed above, 

 the right very strongly. The eyes are large and convex, prom- 

 inent, coarsely faceted and only feebly emarginate anteriorly, 

 the antennas slender and moderate in length. It has somewhat 

 the facies of a very small Armalia and may take the generic 

 name Micrarmalia (n. gen.). The form of the front and man- 

 dibles would seem to betray some relationship, also, with the 

 Trimytini, through Pesccnnius, and indeed it may prove difficult 

 to maintain the identity of the two tribes Eurymetoponini and 

 Trimytini, when all the genera become known. 



Some of the other genera proposed by Mr. Champion may 

 be remarked upon as follows : — 



Mesabates Champ. 

 This genus is represented by latifrons, a singularly short, 

 stout and oblong-oval species, with a large head, which is trans- 

 verse and feebly bisinuate anteriorly, with the median lobe short 

 and transversely truncate, the eyes moderate, coarsely faceted 

 and more than half divided, with short supra-orbital carina, and 

 the antennas unusually developed, being long, very heavy and 

 scarcely at all enlarged distally. The metasternum is extremely 

 short, about half as long as the first ventral but with the trans- 

 verse ante-coxal grooves evident. It belongs near Mela7iastHs 

 in the Eurymetoponini. 



