JOURNAL 



JMj JBopk Qntomologiral Horiptg. 



Vol. XIII. DECEMBER, 1905. No. 4 



Class I, Hexapoda. 



Order II, COLEOPTERA. 



ON THE AFFINITIES OF THE GENUS TACHY- 



CELLUS, WITH DESCRIPTIONS OF NEW 



SPECIES FROM THE WESTERN 



UNITED STATES. 



By H. C. Fall, 



Pasadena, Cm.. 



The first reference to the genus Tachycellus in our literature was 

 made by LeConte in his "Notes on the Species of Agonoderus, 

 Bradycellus and Stenolophus Inhabiting America North of Mexico." * 

 In this paper, which was prompted by one on North American Cara- 

 bidee by Chaudoir,f LeConte declares himself not ready to follow the 

 French author in referring certain of our species to Tachycellus Moraw. , 

 which species he retains as Group A of Bradycellus, as follows : 



dichrous Dej. badiipennis Hald. 



vulpeculus Say. atrimedius Say. 



autumnalis Say. nebul sus Lee. 



nigrinus Dej. 



tibialis Kirby. 



In his Genera of Carabidaa (1881), Dr. Horn admits the validity 

 of Tachycellus for the species of the second column above, and trans- 

 fers those of the first column to Harpalus. Two years later Horn 

 gives in the Brooklyn Bulletin \ a synoptic table of Tachycellus, in 



*Proc. Acad. Nat. Sci. Phila., 1 868, p. 373. 



f Revue et Mag. de Zoologie, 1868. 



+ Bull. Brook. Ent. Soc, VI, 1883, p. 51. 



169 



