468 CASEY 



The three forms cequaltSy a specimen of which has recently 

 been received from Tempe, Arizona, variabilis and incrustans 

 are close allies of tristis Lee, and whether they should be 

 regarded as subspecies or not, is a question that I am not fully 

 able to decide at present, but it would probably harmonize more 

 nearly with concensus of opinion, at the present day, to so con- 

 sider them. Morosus is allied to guttidatus , differing in the 

 much less rounded sides of the prothorax and closer and much 

 more confused elytral sculpture. Verrucipennis is related 

 closely to otiostis, and the type was included among the orig- 

 inal cotypes of that species, but it differs in its more abbrevi- 

 ated elytra, with sparser, much more elevated and not so 

 definitely serial tubercles and less rounded sides of the pro- 

 thorax toward base. Inhabiting the same geographic region, 

 though doubtless a very different station, it has evidently been 

 evolved with otiostis from a common ancestor in comparatively 

 recent times, and, although now sufficiently distinct to be easily 

 recognized, it may possibly with more propriety be regarded as 

 a subspecies of otiosus. The elytra toward the sides have some 

 of the grayish indument, so developed in the tristis group, 

 which is wanting in otiostis. This indument is minutely granu- 

 lato-reticulate, like the rest of the surface, and is permanent; it 

 differs wholly in nature from the pale coating in Zofherus and 

 forms a remarkable peculiarity of Zopherodes. Parvicollis is 

 related to ventriostis but differs in sculpture and in its very 

 opaque sericeous integuments, and califo7'nictis is founded 

 above upon the specimen which I formerly regarded as the 

 male of ventriostis (1. c, p. 39) ; it is evidently a distinct species. 

 Elongattis is allied to Itigtibris and -ptidens but differs in its 

 more flattened upper surface and very much coarser vermicu- 

 late sculpture, and ^naWy, geminatus stands alone at the foot of 

 the series, to be followed by gracilis, differing from it as above 

 stated. The individuals in variabilis differ in size among them- 

 selves to a very unusual degree, scarcely realizable from the 

 measurements given. Additional specimens of lugtibris have 

 recently been received, collected near Flagstaff, Arizona. 



The Zofhertis elegans, of Horn, is possibly a member of the 

 genus Zopherintis, the Durango specimens figured by Champ- 



