DYNASTIN.E 227 



fourth longer than wide, broadly rounded at the not very obtuse 

 apex, nearly a fourth wider than the prothorax and somewhat more 

 than twice as long, the coarse striae gradually more deeply impressed 

 internally, having large shallow annuli, finer externally and confused 

 apically; pygidium convex, smooth, minutely, sparsely punctulate, 

 becoming coarsely but feebly rugulose laterally and more finely 

 basally, the apical gutter at the middle not deep or abrupt, caused 

 as usual by the more abrupt convexity of the surface behind it; 

 hind coxal plates punctured and conspicuously pubescent through- 

 out. Female nearly like the male but rather narrower and more 

 elongate, the pronotum at apex with a mere vestige of the tubercle, 

 caused by a feeble angular enlargement of the apical beading, 

 the punctures generally smaller, sparser and less conspicuous, than 

 in the male, as is usual; pygidium flatter but almost similarly 

 sculptured. Length 19.5-22.5 mm.; width 11.5-13.0 mm. New 

 Mexico (a male and female taken by F. H. Snow and probably 

 forming part of the material serving for the original description),, 

 also Cloudcroft (three females taken by Mr. Knaus), and a pair taken, 

 by Wood gate at Jamez Springs; also Mexico (Chihuahua two- 



females taken by C. H. T. Townsend) snowi Horn 



4 Body ovoidal in form, convex, shining, castaneo-rufous; head fully 

 a third as wide as the prothorax, transversely rugose, the fine sinuous 

 raised line marking the clypeal suture expanded and feebly tumulose 

 at the middle; clypeus with the oblique sides straight, only very 

 finely and feebly elevated, the surface flat, the subapical carina only 

 moderate, its medial sinus cutting almost to the base; prothorax: 

 barely one-half wider than long, the sides rounded and much more 

 parallel than usual, more rapidly converging at apex, the basal angles 

 very obtuse, the bead only moderate and not so sharply defined at 

 the middle; punctures fine and very sparse, obsolescent medially, 

 becoming rather strong and closer apically, though well separated 

 even antero-laterad; scutellum as long as wide, very obtusely ogival 

 and rounded at the sides, smooth as usual but with traces of a fine 

 impressed median line; elytra inflated behind and broadly, rather 

 obtusely rounded at apex, fully two-fifths wider than the prothorax 

 and much more than twice as long, the sculpture nearly as in snowi; 

 pygidium shining and smooth, nearly flat, almost three times as 

 wide as long, finely but distinctly, sparsely punctured, less finely 

 and subcoalescently near the lateral ends, the apical bead flat, 

 equal, well defined, bearing a series of coarse punctures medially; 

 margin of the expanded apex of the hind tibiae perfectly even as 

 usual. Length (9) 17.7 mm.; width n.o mm. Mexico (Sierra 

 Madre Mts., Chihuahua), C. H. T. Townsend. . *parvitarsis n. sp. 



Organs of stridulation are probably wholly wanting as in Aphonus, 

 the propygidium being minutely and remotely punctulate and 

 sparsely pubescent. The pygidia seem to be rigidly connate, 

 except at the sides, where the suture becomes much coarser and 

 deeper, this structure also being as in Aphonus, as well as the Euro- 



