Coleopterological Notices, III. 17 



the prothorax nearly as in vehhi, polished, very minutely feebly and rather 

 sparsely punctured, with somewhat uneven, completely unimpressed series of 

 fine, rather distant punctures. Under surface polished, pruinose with violet- 

 blue toward the sides, minutely, feebly pnnctulate. Length 36.0-38.0 mm. ; 

 width 12.0-12.5 mm. 



Arizona (Fort Apache). 



This species differs from webbi, in addition to its very much larger 

 size, in the decidedly longer third antenna] joint in the male, more 

 minutely punctulate surface with the pronotum coarsely punctate 

 anteriorly, in the strong impression of the head, in the abruptly 

 limited and much narrower marginal white vittte, and in the sparser 

 and deep violet-blue vestiture, the latter being extremely dense, 

 paler and olive-green in webbi. Together with webbi, it belongs 

 to Section III of Candeze, and in the vicinity of circumducfus, from 

 which it differs in its entirely flat and not alternately convex elytral 

 intervals. 



SCARAB.EID^E. 



POLYPHYLLA Harris. 



The western species which are homologues of decimlineata in 

 ornamentation, may be easily identified as follows: — 



Antennal club of the male very large, fully three times as long as the stem ; 

 vestiture more or less strongly squamiform. 

 Antennal club of the female nearly as long as the entire stem; pygidium in 



both sexes pilose and very sparsely squamose speciosa 



Antennal club of the female about one-half as long as the stem; pygidium 

 in both sexes densely squamose, not at all pilose, with a narrow denuded 



median line decemliiieata 



Antennal club of the male much smaller, not more than twice as long as the 

 stem ; vestiture less strongly squamiform. 

 Pygidium of the male witli the edge strongly reflexed at and toward the 

 apical angle ; elytral vittse always dense and distinctly limited ; color 

 generally castaneous ; spurs of the hind tibije extremely unequal, the 

 longer nearly twice as long as the shorter and generally bent...ci*inita 

 Pygidium of the male with the edge not reflexed at apex ; elytral vittse 

 more or less unevenly disintegrated ; color piceous-black ; spurs of the 

 hind tibije much sjnaller, straight and subequal diffracta 



My series of decimlineata is very full, embracing specimens from 

 Puget Sound, California, New Mexico, Texas and San Luis Potosi, 

 and throughout this region there is but slight variability exhibited 

 in cither sex. Speciosa is a remarkable species, distinct from dccim- 



