62 CASEY 



Elevated pronotal spaces very small and few in number, widely scattered; 

 sculpture and subsutural striation of the elytra aberrant 9 



5 — Elytra distinctly subcostate, cuprascent. Body moderately stout and 

 convex, shining, the pubescence of the upper surface and head unusually 

 short, also fine, short and close beneath; head and pronotum bright 

 aeneous, the former closely and subevenly rugose, except near the eyes 

 and on the occiput, the inter-rugal punctures coarse and not dense; 

 antennae ( d^) extending rather beyond the base of the prothorax, the 

 latter three-fifths wider than long, very slightly narrower than the 

 elytra, of the usual form, the basal angles distinctly everted and acute; 

 scutellar sinuation feeble; surface with strong but very irregular pol- 

 ished elevations, continuous along the median line, the interstitial punc- 

 tures rather small and dense; elytra just visibly narrowed and with 

 nearly straight sides to apical two-fifths, thence obliquely to the rather 

 acute apex; surface with the three broad costae of planicosta very evi- 

 dent but still more ragged and broken, the striae, except the sutural and 

 scutellar, scarcely traceable; punctures close, finer and denser laterally. 

 Length 20.0 mm.; width 7.7 mm. Arizona (Bill William's Fork), — 

 F. H. Snow snowl n. sp. 



Elytra with the costae never more than traceable; coloration generally more 

 greenish 6 



6 — Form narrower and subparallel, the sinus of the elytral apices broader 

 than usual 7 



Form very broadly suboval 8 



7 — Lustre moderately shining, greenish-aeneous; pubescence of the elytra 

 short but rather abundant, subvittate; head subcupreous, unusually 

 densely pubescent, rather finely, very densely punctate throughout, 

 the median line carinate medially, the elevated spots very few in num- 

 ber and inconspicuous; antennae (c?) extending slightly beyond the 

 base of the prothorax, unusually dilated from the base of the fourth 

 joint; prothorax three-fourths wider than long, the sides broadly round- 

 ing, evidently more so medially, the basal angles prominent; surface 

 with strong and confused through isolated elevated spaces, the punc- 

 tures of the interspaces strong, dense and cribrate; elytra between three 

 and four times as long as the prothorax and a little wider, the dorsal 

 humeral swelling pronounced; surface striated, suturally, the costae 

 evident but only feebly convex, not elevated, the surface laterally deeply 

 and very densely cribrate; under surface greenish-aeneous, finely, 

 densely punctate except medially. Length 23.5 mm.; width 8.8 mm. 

 Arizona cribriceps n. sp. 



Lustre strongly shining, greenish, sometimes with a faint xneous tinge; 

 pubescence less abundant, very short; head metallic-green, confusedly 

 rugose, the punctuation of the interspaces coarse, close but much less 

 extensive than the smooth rugosities, the pubescence much sparser 

 than in cribriceps; antennae not so broad at the fourth joint; prothorax 

 nearly similar but with the small punctures of the interspaces not so 

 dense or deeply cribrate; elytra but little wider than the prothorax, 



