282 REVISION OF THE TKNKBKIOXIIU: OF AMERICA, 



M. punctata, Sol., Ann. Soc. Entom. \'.. p. I?"i; pi. 11. fig. 22. 



for several specimens of this species 1 must acknowledge my indebtedness to Mr. 

 Win. M. Gabb, by whom they were collected on tin- peninsula of Lower California. 

 Length .62-.82 inch. 



M. insequalis, Lee, Ann. Lye. \'.. p. 129. Lacord. Gen., pi. 51, ti^'- 5. Puncticollis, Lee., loc. •it. 



I unite the two species of Dr. Leconte, there being no characters on which to separate 

 them. Tiie latter form is. however, -mouther, the rugosities of the elytra less defined, a 

 character of hut little value, as may he seen by examining other genera of the family 

 (Phlceodes and Centrioptera), where age and locality cause the same species to vary 

 greatly in this respect. M. inaequalis is not rare at San Diego, and occurs at Tejon and 

 various places along the coast range. Puncticollis is from Warner's ram-he. near the bor- 

 ders of the Colorado desert. 



Length .(>(>-. (>•"> inch. 



M. sulcipennis, Lee., Journ. Acad.. Series II, vol. IV. p. is. 



Differs notably from the preceding species, and might with great propriety, according 

 to the hitherto received rules, form a new genus. I prefer, however, to retain it in the 

 e,vnus in which it was placed by its author. The hind angles of the elytra are acute and 

 overlap the rectangular humeral angles of the elytra. Its form is consequently near that 

 of Asida opaea. From Llano Estacado, Texas. 



I. nuili .60 inch. 



- 



ASIDA, Lair. 



Asida, Latreille, Hist. Nat. Crust, ft Ins. X.. p. 2G9. 



Pelecyphorus, Sol., Ann. s,.,-. Entom. V.. p. 167. 



Euschides, Lee., Ann. Lye. V.. p. 107. • 



Philolithus, I. ar.. Genera des Coleop. V.. 157. 



I nder the older name of Latreille. it is proposed to assemhle all the species of Asidini 

 in which the trochantin of the middle coxa' is plainly visible, the antenna? not received 

 in thoracic grooves, and eleven-jointed. 



After a very careful study of our own and all the foreign species accessible to me. the 

 diffen aces between the genera as given by Lacordaire and Solier, have vanished com- 

 pletely, so that while we have among typical Asidse a very distinct prolongation of the ex- 

 ternal apical angle of the anterior tibia?, and among the species referred to Philolithus a 

 total want of such prolongation, numerous intermediate tonus occur in our fauna to which 

 it would he difficult to assign a place in either genus. Instead, therefore, of erecting 



these into genera as numerous as the species, (as has been too often done already) the 

 more conservative plan of uniting all with one genus has been pursued. The presence or 

 absence of prominent hind thoracic angles lias also had undue importance assigned to it. 



