SYNOPSIS OF TllK l.AMIIN.K 171 



Prothorax more or less strongly tniiisverse, very densely, (Hinfluciitly imnctureil 



and densely pilose. 



AntennfB of the male rather short, never much longer than the body, those of 



the female very short and stout, with the joints scarcely more than twice 



as long as wide. 



Elytral inmctuation very coarse, becoming liner towards apex, the punctures 



always distinctly separated piiiiotatiiN. 



Elytral punctuation finer, becoming extremely dense toward ape.\. 



te!«taceiis. 



Autennie of the male very long and slender, much longer than the Ixxly, those 



of the female moderate in length, slender, with the joints tiiree or four 



times as long as wide. 



Autennpe and legs pale ; posterior tarsi short and slender ; elytral jiunctures 



coarse, always distinctly sejiarated iiitorini'<lius. 



Autennse and legs black, or piceous black ; posterior tarsi longer and mucli 

 stouter. 

 Elytral punctures fine and very dense, coarser toward base. 



loiigi|>eniii!«. 

 Elytral punctures very coarse, nearly as in pnnctataK, but denser. 



c*ras<«i|»e!$. 

 Prothorax much less transverse, coarsely, deeply punctate aiid shining, the punc- 

 tures all distinctly separated. 

 Antennie of the male much longer than the body. 



Elytra rather finely and very densely i)unctate, tlie elytral basc^ and suture 



throughout black liii'tipes. 



Elytra very coarsely. spar.sely punctate, with a narrow fusiform black area 

 at the suture scarcely ever extending as far as basal fourth. 



iiiti<Iicollis. 



AntenuiE of the male much shorter, never notably longer than the body ; 



elytral punctures very tniai-se toward base, the disc with a broad black 



sutural area, which is usually angulate anteriorly, sometimes attaining 



the base |>iiloliolliis> 



Sphcenothecus rubens Casey, 1891, An. N. Y. Acad. Sci. vi, 34. 

 This is a variety of suturalis, in which the punctuation at the sides 

 of the thorax and elytra becomes very fine and dense, hut in many 

 individuals this and suturalis, which is very variable in the coarse- 

 ness or fineness and density of its punctuation, approximate. There 

 are no primary structural characters by which the forms can be 

 .separated, and none of the secondary, as color or length of the an- 

 tennae are permanent. Both forms are abundant in southwestern 

 Texas, New ^Mexico and Arizona. 



Spha;notliecuN basalis Horn, 1894, Coleop. Baja (^alif. (Proc. Cal. Acad. 

 Sci. ser. 2, iv, 401). 

 Length 12-14 mm. = .48-.56 inch. Habitat. — Lower California. 



Described as piceous black, moderately shining, a very small luiir 

 in each })inicture of the dorsal surface, the base of elytra and femora 



TKANS. .\M. KNT. SOC. XXIII. JUNE, 1896 



