AMERICAN COLEOPTERA. 113 



be suppressed at all it must be as a section of the present and not of 

 Al^cetoporus as suggested by Fauvel. 



In all our species the middle and posterior tibiae are fimbriate at tip 

 with uneciual and rather coarse spinules. In BryoporiLs the spinules 

 are short, equal and closely placed, while in Mi/cetoporus the species 

 are variable, some have unequal and others ecjual spinules. The 

 femora have usually three apical bristles such as have been noticed 

 in ConosonKt, etc. 



The thorax has the usual marginal punctures but none on the disc. 

 The elytra have three rows of punctures, a sutural, a marginal, and a 

 discal series, as in 3fi/c€(oporuft, while Bryoporus has many rows of 

 rather deeply impressed punctures. 



The head varies very greatly in length being shortest in those at 

 the beginning of the table, the species being arranged dichotomously, 

 so that, while other characters are kept in view, the head gradually 

 increases in length. In the short headed species the antennae are 

 more flattened, the joints more closely placed and from the fifth to the 

 tenth transverse and twice as broad as long. These appear to be allied 

 to those for which the genu.s Mcjacroiiux was proposed. 



Those species which have rufo-testaceous elytra with black .spots 

 seem rather indefinite and will require to be separated by a careful 

 examioation of the sexual characters, those used in the table being 

 rather for convenience. 



Nothing however is less to be depended on than the color of the 

 elytra and it is only to be considered when other characters can be 

 found to substantiate it. 



The sexual characters are extremely feeble and will be mentioned 

 ■with the species in which they have been observed. 



The following is the proposed arrangement of the species. 



Maxillary palpi elongate, slender, glabrous I. 



Maxillary palpi short, stout, third joint sometimes pubescent 4. 



1. — Head oval or moderately elongate, never widest at base 2. 



Head very elongate, twice (or even more) longer than wide and widest ac 



base, (fig. ;^2) 7. 



2. — Abdomen variable but always unicolorous 3, 



Abdomen bicolored, red, apical two joints black 6. 



3. — Antennae with joints 5 — 10 decidedly transvere, Mkc;a(iionls, (fig. 31, a). 



Elytra unicolored, black or piceous iliger. 



Elytra black, apex narrowly, and a broad discal vitta, testaceous. 



axillaris. 

 Antennae with joints 5 — 10 distinctly longer than wide. Elytra maculate. ..5. 

 4. — Antennae with joints 5 — 10 transverse. 



Elytra bicolored, black, basal half red <liini«liaf US. 



TRA.NS. AMER. EKT. SOC. VI. (16) JUNE, 1877. 



