622 Coleopferoloc/ical Notices, VI. 



allied to caudatus, (littering in the shorter, non-caudate elytra, 

 denser punctures of the head and pronotum, coarser abdominal 

 punctuation, shorter antennae and smaller size. The type is 

 from a locality in Arizona, widely different from that of caudatus, 

 and there is reason to believe that the caudal process in the latter 

 is as permanent and invariable a feature as in Eleodes caudifera 

 Lee; so there appears to be but little doubt of the validity of 

 the species. 



TOXIBIIS n. gen. 

 The only species which can 1)e referred to this genus for the 

 present are sulcatus Lee, and alternatus Cs,\. The latter of these 

 species is in no sense an abnormal state of the former, of which 

 I have before me an ample series, no specimen of which displays 

 any tendency to vary in the direction of the peculiar specific 

 characters of alternatus. In alternatus the size is materially 

 greater than is CA'er attained by s»/cfl/».s,and the sculpture of the 

 pronotum is very much coarser. 



NOTIBirS Lee. 

 This is a natural and distinctly characterized group of species, 

 in which the body is stout, oblong and convex, with a dense de- 

 cumbent fringe along the lateral margins of the prothorax, and 

 broad fossorial anterior tibial in both sexes. The four species 

 may be distinguished at once b^' the following strongly marked 

 and constant characters : — 



Third antenna] joint elongate, gradnally and feel)]y obconical from base to 

 apex. 



Sides of the pronotum broadly reflexo-explanate pilbei'lllus Lee. 



Sides not at all or very narrowly subexplanate. 



Head parallel at base; apical angles of the prothorax obtnse but evident 

 externally ; pronotum coarsely and deeply' punctate. 



siibfiiti'iatiis Csy. 



Head subangularly prominent at base; apical angles of the prothorax 



very l)ioadly and transversely rounded ; pronotum very tinely, feebly 



and sparsely punctate laticeps Csy. 



Third anteinial joint short, only slightly longer than wide and dilated at apex. 



piiiicticollis Lee. 



Of sul)striatus I have a large series, taken by Mr. Weidt in 

 southwestern Utah ; it extends thence to the elevated plains of 

 the Mojave Desert in California. Paherulus is represented in 



