Coleopterological Notices, VIL 301 



Elytra much less deeply striate, the intervals feebly convex ; punctures smaller 

 and more widely separated particularly in the sublateral series. 

 Elytral punctures fine, not extending much behind the middle on the 



median line of each lacustre n. sp. 



Elytral punctures stronger, extending well behind the middle on the 

 median line texanum. n. sp. 



■y — Elytra finely striate, the striae rather finely and closely punctate with flat 

 intervals ovale Horn 



Elytra narrowly rounded at apex, more dilated at the sides near the base, 

 strongly striate, the striae closely and strongly punctured ; intervals con- 

 vex ; size small concinnum n. sp. 



8 — Body broadly and almost evenly oval in form 9 



Body narrower, oblong-oval, the sides parallel and much less arcuate 10 



9 — Elytral punctures extending almost to the apex ; metallic-green spot of 

 the pronotum occupying median half only tesselatum Say 



Elytral punctures obliterated well before the apex ; pronotal metallic spot 

 extending almost to the lateral margins dentatum. Lee. 



10 — Large species, the green metallic areas darker and duller, distinctly pre- 

 dominating over the pale areas, that of the pronotum attaining the apex 

 only in a narrow point on the median line SOliduiU. n. sp. 



Small species, the dark areas less predominant, very bright and polished me- 

 tallic-green throughout, that of the pronotum broadly attaining the apex 

 at the middle gemma n. sp. 



11 — Striae deep, rather coarsely and deeply punctured, dark areas predominant. 

 Strial punctures approximate, distinct almost to the apex, the striae sulci- 



form toward base. Sonora sonorae n. sp. 



Strial punctures widely separated, obliterated well before the apex, the 

 striae impressed but not sulciform. Arizona obliteratum Horn 



Striae deep, finely and closely punctured ; general color of the upper surface 

 pale, the dark markings small. Arizona gilae Lee. 



Striae fine and rather feeble with moderately large and somewhat widely sep- 

 arated punctures extending to the apex ; markings nearly as in gilse. 

 Utah pallidum n. sp. 



Striae faint, the punctures large and widely separated ; elytra relatively shorter ; 

 markings nearly as in gilse andpallidum. Nova Scotia..rol>usti]m Horn 



The new species announced above are described as follows : 



O. lacustre. — Form and coloration as in americanum, except that the 

 surface is less convex and the subapical pale marginal spot extends forward 

 very obliquely nearly to apical third, the elytra rather more pointed behind 

 and the sides of the prothorax more divergent from apex to base. Head with 

 the pale area evenly angulate ; surface impunctate except in the metallic-green 

 basal area, which is rather strongly but not densely punctured. Prothorax 

 much more than twice as wide as long, the sides rather strongly convergent and 

 evenly, feebly arcuate from base to apex ; surface somewhat strongly but 

 sparsely and unevenly punctate, the punctures fine and very sparse in a trans- 



Annals N. Y. Acad. Sci., IX, February, 1897.— 21. 



