810 Coleopterological Notices, VI. 



First ventral suture very deep and T\idely impressed, generally straight or 

 only slightly arcuate in the middle; second segment not longer than the 

 next two combined ; met-episternal suture distinct ; scutellum ver\' short 

 and broad, not entering the elytral disk. 



Elj'tral intervals not alternating in convexity DyslolJllS 



Elytral intervals distinctly alternating in convexity throughout the length. 



Amnesia 



First suture fine, not broadly impressed and broadly arcuate. 



Body squamose and pubescent; scutellum distinct; second ventral segment 

 much longer than the next two combined; met-episternal suture distinct. 



Adaleres 



Body squamose, the elytra withoiat erect hairs, the intervals alternating 

 strongly in convexity and vestiture; scutellum extremely small, acute; 

 second ventral segment not longer than the next two combined; met- 

 episternal suture completelj^ obliterated Nomidus 



In this scheme Amnesia is limited to those species having the 

 el3'tral intervals strongl}' alternating in prominence, and it is 

 probable that other genera will ultimatel}- have to be formed for 

 the smaller and more obscure species, such as rauca and decorata, 

 at present associated with them ; it is more than probable that 

 these forms can be included in Lepesoma of Motschulsky , although 

 L. californica can never be identified without the type. I can 

 find no essential difference in the form of the first ventral suture 

 and relative extent of the second segment, which were advanced 

 by Di". Horn to distinguish D3'slobus from Amnesia granicoUis, 

 the type of Amnesia, and the differential character which that 

 author attempts to draw from the internal terminal spur of the 

 hind tibiae is wholly illusory and devoid of value in this particular 

 connection. 



These four genera are in fact intimately allied among them- 



selves, having the beak rather elongate, separated from the head 



by a transverse depression and with the scrobes short, flexed 



gradually downward, broadening and becoming evanescent far 



before the eyes, and the ocular lobes at least moderately distinct 



throughout. In the table given by Dr. Horn (Proc. Am. Phil. 



Soc, XV, p. 38), D^'Slobus and Amnesia are widel}' separated by 



a number of genera which are not particularl}^ closely related to 



them, and in some cases widely dissimilar in important details of 



structure. 



D\SI.OBLS Lee. 



The species of this genus are rather large and elongate, some- 

 what less so in the female than in the male, and have the ocular 



