Eigenmann: South American Silurid^. 



403 



Entomocorus' gen nov. 



Related to Auchenipterus, Centromochles, and Trachycorystes. 



Adipose fin short; caudal moderately forked; anal moderate; 

 ventrals with six rays, not adnate; pectoral spine serrate on both 

 margins; the four mental barbels arranged in a nearly straight row or 

 a row parallel with the edge of the lower jaw, not in pairs; maxillary 

 barbels wiry at the base, fitted into a groove at the lower margin of the 

 large eye. 



9. Entomocorus benjamini* sp. nov. (Plate XLI). 



7006a, C. M., type, 59 mm.; 7007a-/, C. M., paratypes, 55-64 mm., 



San Joaquin, Sept. 5, 1909. Haseman. 

 6773a-c, C. M., paratypes, 47 and 48 mm., Rio Santa Rita, June 12, 

 1909. Haseman 



Head 4; depth 4-4.33; D. 1.5; A. — , — , — ; V. 6; eye 3-3.5 in the 



I 2 3 



head; interorbital 2 in the head; width of the head slightly less than 



its depth at the base of the occipital process. 



Fig. 3. Entomocorus benjamini Eig. Type C. M. No. 7006. 2J3 nat. size. 



' ePTOfios = notched, Kopvs, rj — a helmet. 



* For Marcus Benjamin, Editor of the publications of the United States National 

 Museum. 



