Coleopterological Notices, VI. 627 



Nematoplini. 



The exceedingly rare Nematoplus coUaris Lee, is at present 

 the only species assignable to this tribe. The hind tarsi are fili- 

 form throughout, with the third joint simple and cjdindrical ; this 

 very exceptional structure in the first genus of the subfamily be- 

 ing similar to that of Mecynotarsus, which I have placed at the 

 -end. The tarsal claws are by no means cleft, as stated by Le- 

 Oonte and Horn (Class. Col. N. A., p. 410), but are simple and 

 thickened or subdentate internally at base, where there is attached 

 a long slender minutely pubescent appendage, which almost equals 

 the claw in length ; besides this remarkable appendage, thex'e is a 

 distinct bisetose onychium between the claws.* The last antennal 

 joint is not unusuall}^ elongate, and the feeble apical constriction 

 of the prothorax does not extend laterall}^ upon the flanks. 



EURYGENIINI. 



The genera composing this tribe are somewhat numerous, and 

 are confined entirely to the new world ; those known to me at 

 present ma}- be distinguished as follows : — 



Last joint of the antennse not noticeably elongate. 

 Eyes narroAvly and distinctly emarginate. 



Tempora prominent; antennae filiform; maxillary palpi large, with the 



last joint triangular Retoconitis 



Tempora not prominent ; antennse serrate and very long ; maxillary ijaljn 

 small, filiform, the last joint cylindrical and not much longer than the 



preceding Mastoremus 



Eyes truncate or broadly and feebly sinuate; antennae filiform. 

 Tempora well developed and prominent. 



Eyes large; spurs of the hind tibiae short; last joint of the maxillarj'^ 



palpi long and cultriform Stereopalpus 



Eyes much smaller; spurs of the hind tibiae long; maxillary jxilpi 



greatly developed, very broad, the joints triangular Pergetus 



Tempora not prominent; eyes very large; tibial spurs short. 



£11 ry genius 

 East joint of the antennae much elongated Bactrocerus 



These genera are all North American, except Eurygenius. 

 which is confined as far. as known to Brazil. The third joint of 

 the hind tarsi is triangular, not dilated and not membranous or 



* The claws were described properly by LeConte in the original diagnosis of 

 Nematoplus (Proc. Ac. Nat. Sci., Phila., 1855, p. 275). 



Annals N. Y. Acad. Sci., VIII, Sept., 1895.— 43 



