THE CANADIAN ENTOMOLOGIST. 163 



nest. I find Hetcerius brunnipennis with this ant. April and May. Dr. 



Leconte took C. month's under bark in August in Michigan. (B. J., 6, 



73 ; Can. Ent., i8, 26.) 



Cedins Ziegleri Lee. Dr. Leconte took a specimen at Bedford, Pa., 



in the nest of Formica ritfa, though previously he had found it under 



bark. (Tr., 6, 288; B. J., 6, 74.) 



Tmesiphorus costalis Lee. Found with Formica rufa. (Tr., 6, 287.) 

 Ctenistes pulverens Lee. Taken at San Jose, California, "with a small 



piceous ant with testaceous legs." (An., 5, 214.) 



Tychns puberulus Lee. With ants. San Jose, California. (An., 5, 

 214) 



Decarthron formiceti Lee. Found with Formica Pennsylvanica. April. 

 Pennsylvania. (B. J., 6, 90.) 



Batrisus I once. Found by Dr. Leconte " with a small, opaque, black 

 ant, with rufo-piceous feet and antennas." May. Mt. Iona, Georgia. 

 (B. J., 6, 94.) 



B. armiger Lee. Lives with a medium-sized rufous ant. Pennsylvania. 

 (B. J, 6, 94) 



B. ferox Lee. Found with various ants. Pennsylvania, loc. cit. 



B. cristatus Lee. Found with a large rufous ant with a brownish 

 head. Pennsylvania, loc. cit. 



B. riparius Say. Occurs occasionally in Pennsylvania under stones 

 with Formica Pennsylvanica (?), but more frequently under pine bark in 

 Georgia. (B. J., 6, 95.) 



B. globosus Lee. Inhabits with several species of ant in Pennsylvania 

 and Georgia. (B. J., 6, 100.) 



B. bistriatus Lee. Taken by Dr. Leconte with a large rufous ant, loc. 

 cit. I have taken it twice in April with a medium-sized honey-yellow 

 ant. The ants seem to be very fond of them, and carry them off like 

 their eggs and pupae, while the beetles appear to be entirely impassive. 

 (Can. Ent., 18, 26.) 



B. lineaticollis Aube. Taken with a large rufous ant. Georgia and 

 Pennsylvania. (B. J., 6, 100.) 



It is quite probable other species of this genus occur with ants. Five 

 species in California, described as new by Mr. Casey since the catalogue 



