REVISION OF ELEODTINT BLAISDELL. 131 



After a careful review of the literature and a study of the series of 

 exaiu})les before me, I can come to only one conclusion, and that is 

 that there are four incipient races involved and to be recognized. 



The following forms may therefore be indicated: 



Forma typica. — Thorax subquadrate, sides rounded, scarcely sin- 

 uate toward the base; basal angles obtusely rounded. Elytra seri- 

 ately granulate and sparsely nuiricato-punctate, on each side of the 

 suture sul)seriatel3' punctate; humeri somewhat produced. 



It must be borne in mind that the granulate condition is really 

 com[)()sed of small flat tubercles, with intervening nniricate punctures. 



Forma obtusa. — Thorax ovate, sides rounded, oblique ])osteriorly, 

 basal angles obtuse; disc with smooth spaces each side of the middle. 

 Elytra with the humeri obtuse, disc punctate about the suture, later- 

 all}^ and about apex with oval elevations of moderate size, which are 

 not very distinctly seriate. 



jNIv specimens are opaque and the pronotal punctures are smaller 

 than those of the Siskiyou specimens, and distinctly coarser than in 

 the examples from Xew Mexico. 



Forma aspera. — Thorax strongly and densely punctate, sides 

 rounded and subsinuate behind, basal angles obtuse and not rounded. 

 Eytra with the humeri subacute, dorsum somewhat flattened, sculp- 

 tured with bright reclinate granules which are briefly piliferous, the 

 granules are densely and subseriately arranged, moderately trans- 

 versely rugose. 



Forma tuberculata. — Thorax as in (o^pcra. P^lytra with the hu- 

 meri subacute; disc sculptured with distinct tubercles, which usually 

 show a serial arrangement, alternate series larger and not at all 

 rugose. 



These Siskiyou specimens are larger and more elongate than 

 ohfi/s(!^ aud usually of an intense black and feebly shining. The 

 pronotal ])unctuation is like that of Upis cerainboide.s. only that the 

 punctures are distinctly separated and not coalescent. The elytral 

 tuberculation is almost like that observed in c/ranom. 



The development of the tubercles shows considerable variation in 

 the series before me. The interstitial series are the larger, and in" 

 the roAv the tubercles vary in size in different examples, in some sub- 

 equal in size and rounded, in another some larger and others smaller, 

 rounded or oval, and occasionally they appear to coalesce longitudi- 

 nally in twos and threes to form an elongate tubercle of about 2 mm. 

 in length, several appearing in the same row ; the strial series are 

 small granules, these may be of uniform size, or some larger and 

 others smaller in the same series; both series become irregular lat- 

 erally and on apex, both as regards size and serial arrangement. 

 One example has the majority of tubercles of moderate size and 

 equal, with few small granules scattered about; another has a dis- 



