54 AMERICAN COI.EOPTERA. 



examples before me there are typical repiesentatives of* both the 

 above forms, which, in my opinion, represent only one extreme in 

 tint and pattern of elytral vestiture. 



O^ koebelei Csy. which was unwisely described from a very badly 

 rubbed unique, I can only say that it is all but certain that it is 

 only the prevailing California form of adspersus, which is always 

 darker in color than specimens coming from the warmer parts of 

 Arizona and New Mexico, thougli closely similar to those from 

 Texas, Utali and the more elevated regions of Arizona. 



C. missourianus Csy. — Of this I know nothing. According to 

 Casey it "greatly resembles opermtlatus," and I find absolutely noth- 

 ing in the description upon which to base a separation. 



C. sparsus Csy. — Tyj)ical examples from the National Museum 

 are before me. These are closely allied to operculatus, but the 

 smaller size and somewhat conspicuously more approximate eyes are 

 perhaps sufficient to distinguish it. 



C. Jiorichums Csy. — Specimens from the type locality, Haw Creek, 

 Florida — are at hand, agreeing in form and size with Casey's de- 

 scription, but not so pale in color. This is a common form of varia- 

 tion in nanulus, specimens of which from Texas are scarcely distin- 

 guishable from the Florida ones ; I have no doubt of their identity. 



C. frontalis Casey and C. cavifrons Casey. — These appear to be 

 founded on trifling variations of quercus. 



C. nubilatus Csy. and C. nmcidus Csy. — These are identical and 

 should be united under the former name. They are near relatives 

 of longulus, barely distinguishable therefrom by the larger size and 

 the somewhat less closely approximate eyes, which are nearest 

 together at a point less inferior in position. 



C. longulus Lee. — Casey is in error in assuming the eyes to be 

 most closely approximate at the middle of the front in this species. 

 They are precisely as described of subcupreus , ohscurellus and dis- 

 persus, all of which I am confident will prove to be synonyms of 

 longulus. 



The characters upon which Zygomicrus is founded are of little 

 moment, being so nearly paralleled or so gradually approached in 

 other species of the genus that it can at best be regarded as no more 

 than a subgenus, dependent more for its acceptance upon its general 

 facies than upon any peculiarity of structure; it includes minutus 

 Lee. and sobrinus Lee. 



