AMERICAN COLEOPTERA. 85 



and gradually attenuate toward the tip. Allied also to Ccphalagonia 

 Wollastou, Journ. of Entomol. 1. 442, differs in the form of the head, 

 and last joint of palpi. The third joint of antennae is not as long as 

 the fourth in Ccphalagonia and the first tarsal joint long. 



The occurence of genera allied to the above might have been expected 

 from previous experience in the distribution of genera on the two 

 continents. A leg of Trophimus % mounted in Canada balsam shows 

 but four joints to the anterior tarsi even under high powers of the 

 compound microscope. 



T. aeneipennis, n. sp. — Black, shining. Head elongate oval, one half longer 

 than broad, black, shining, imjDunctured; vertex slightly depressed. Antennae 

 black, basal joint paler. Thorax sub-orbicular, slightly truncate in front, rufous, 

 with a black spot at anterior margin, smooth, shining, moderately convex. 

 Elytra slightly broader at base than thorax and slightly broader toward apex, 

 humeri distinct, surface alutaceous, black with aeneous lustre. Body beneath 

 black, shining, meso- and metathorax with few short cinereous hairs, legs black, 

 sparsely cinereous pubescent. Length .12 — .14 inch; 3 — 3.5 mm. 



Resembles AntJiocomus in appearance with the head nearly as long 

 as in Tanaops longiccps, Lee. The thorax is rufous except a small 

 black oval spot touching the apical margin. 



From Colorado and New 3Iexico. For the opportunity of examin- 

 ing specimens I am indebted to Dr. Samuel Lewis of Philadelphia. 



Attains nigripes, n. sp.— Body black, shining. Head black with slight 

 ssneous tinge, front broadly impressed with but few fine punctures and sparsely 

 clothed with cinereous hairs. Thorax rufous, one half broader than long, slightly 

 narrowed behind, sides strongly, base moderately rounded ajjex sub-truncate ; 

 surface shining, sparsely finely punctured and with few yellowish hairs. Ely- 

 tra scarcely wider at base than thorax, black with aeneous tinge, shining, indis- 

 tinctly alutaceous, and sparsely clothed with cinereous hair. Body beneath 

 and legs black, sparsely cinereo-pubescent. Anteunse black, with joints 2 and 3 

 testaceous. Length .08 — .10 inch; 2 — 2.5 mm. 



The anterior tarsi of male have the second joint prolonged over and 

 partly covering the third, those of the female being simple. The api- 

 ces of the elytra are slightly less rounded in the male. The thorax 

 usually rufous has in some specimens a small longitudinal black spot 

 nearer the apex. The abdomen has a narrow membranous space at 

 middle. 



Specimens from the cabinet of Dr. Samuel Lewis. Collected in 

 Colorado. 



The genera allied to Attains and AntJiocomus appear not to be ex- 

 actly parallel in authors. The Anthocomiis of Erichson containeti 

 many elements now considered as belonging to Attains. Duval re- 

 stricts the latter name to those species in which, as in the above, the 



TUAXS. AMEK. EST. SOC. (12) JUNE, 1870. 



