174 MEMOIRS ON THE COLEOPTERA 



base almost truncate, being only very feebly arcuate from side to 

 side, three-fourths the maximum width and four-fifths as wide as 

 the apex, which is rectilinearly truncate from side to side; surface 

 punctured basally and near the apex and with fine transverse rugu- 

 lation throughout the width, convexly declivous laterally to the 

 fine reflexed margin, along which there is a broad impression which 

 is feeble medially, becoming deep at base, the angles not much 

 reflexed; elytra not quite one-half longer than wide, distinctly 

 broadest and inflated posteriorly, where they are two and a fourth 

 times as wide as the prothorax, the apical truncatures feebly oblique 

 and straight; humeri distinct, rounded; striae very fine, not at all 

 impressed and finely, rather closely punctate, the intervals with 

 single more or less irregular series of extremely fine and feeble punc- 

 tures, the third with two punctures. Length 8.0 mm.; width 3.0 

 mm. Texas canora n. sp. 



Sides of the prothorax oblique and at most feebly and very gradually 

 sinuate basally, the angles very obtuse 4 



4 Body larger and broader than in the preceding, bright blue or green, 

 sometimes blue, with the head and prothorax vivid green; surface 

 much more shining; head broader, sometimes barely narrower than 

 the prothorax, sparsely punctate; antennae nearly similar but a little 

 less slender; prothorax nearly similar in general form and sculpture, 

 except that the transverse rugulosity is coarser and deeper, the base 

 much more arcuate and the apex very feebly sinuate; basal angles 

 very obtuse, slightly reflexed and sharply defined; elytra broader, 

 not so inflated posteriorly and less narrowed thence to the base, 

 the apices more sinuously truncate, the striae, intervals and punctu- 

 ation nearly similar, the lustre however much more shining; under 

 surface metallic green or blue, the legs black. Length 8.3-9.0 mm.; 

 width 3.0-3.7 mm. Texas, Colorado and Mexico, [subcordata Chd.]. 



viridicollis Lee. 



Body rather less elongate, moderately convex, not quite so shining, deep 

 violaceous-blue throughout above and beneath, varying to greenish- 

 blue, the legs black; head broader, barely narrower than the pro- 

 thorax, the neck broader; punctures sparse and feeble; antennae 

 nearly similar; prothorax small, fully as long as wide to a little wider, 

 the sides broadly rounded anteriorly, thence converging and very 

 broadly, just visibly sinuate to the angles, which are very obtuse, 

 slightly blunt and distinctly reflexed; base feebly, very evenly 

 arcuate from angle to angle; surface and general features nearly as 

 in viridicollis, except that the sides are broadly and more deeply 

 impressed, the impression obsolete only apically, the basal angles 

 more blunt and the base relatively somewhat narrower; elytra 

 evidently shorter, nearly similar, except that the striae are less fine, 

 more impressed and with the punctures stronger and still more 

 close-set, the intervals less shining and with much less fine, more 

 numerous and more broadly confused punctures, the interstitial 

 punctures in viridicollis being extremely fine and feeble and arranged 

 in more or less evident irregular single series. Length 8.7-9.0 mm.; 

 width 3.2-3.3 mm. Arizona caerulea n. sp. 



