810 Goleopterological Notices, VI. 



First ventral sutiue very deep ami widely inijuessed, generallj' straight or 

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

 next two com])ined; met-ejiisternal suture distinct; scutellum very sliort 

 and ))road, not entering the elytral disk. 



Elytral intervals not alternating in convexity Dyslobus 



Elytral intervals distinctly alternating in convexity throughout the length. 



Aiuiiesia 



First suture fine, not broadly impressed and broadly arcuate. 



Body squamose and pubescent; scutellum distinct; second ventral segment 

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



Adaleres 



Body scjuamose, the elytra without erect hairs, the intervals alternating 



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



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



episternal suture completely obliterated IVomidus 



In this sclierne Amnesia is limited to tliose speeiee having the 

 elytral intervals strongly- alternating in prominence, and it is 

 probable that other genera will ultimately 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 Dr. Horn to distinguish Dyslobus from Amnesia (jranicoJIis, 

 the type of Amnesia, and the dilferential character which that 

 author attempts to draw from the internal terminal spur of the 

 hind tibije is wholl}' illusory and devoid of value in tliis 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, Hexed 

 gradually downward, broadening and becoming evanescent far 

 before the e^^es, and the ocular lobes at least moderately distinct 

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

 Soc, XA'', p. 38), Dyslobus and Amnesia are widely separated b^'^ 

 a number of genera which are not particularly closely related to 

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



structure. 



UlSLOBLS 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 



