Elateridae 455 



Lasius alienus, Crematogaster lineolatus, and Camponotus pennsylvani- 

 cus. It has also been found in numbers with Formica ulkei (Holmquist, 

 1928; Park, 1929), so that it appears to have a wide range of formicid 

 hosts. 



It is now certain that B. globosus, sharing the protection of the host's 

 nest and unmolested by the latter, feeds upon their brood. 



Living host larvae, dead and discolored larvae, and larvae which were 

 experimentally crushed and mangled were offered to the pselaphids. All 

 were attacked eventually, although the beetles did not show a tendency 

 to eat every day. Occasionally they fed on two consecutive days, but 

 more often feeding occurred every other day. The mangled larvae with 

 gaping wounds and exuded body fluid were most stimulating to the 

 beetles. In general B. globosus fed less often, less voraciously, and 

 there were fewer beetles eating jointly, than was the case for the cara- 

 bid, T achy lira incur va. 



m. e. u. 



Bibliography 



Holmquist, A. M. 1928. Notes on the life history and habits of the mound- 

 building ant, Formica ulkei Emery. Ecol. 9:70. 



Park, Orlando. 1929. Ecological observations upon the myrmecocoles of Formica 

 ulkei Emery, especially Leptinus testaceus Mueller. Psyche 36:195. 



Schwarz, E. A. 1890. Myrmecophilus Coleoptera found in temperate North 

 America. Proc. Ent. Soc. Wash. 1:237. 



Family elateridae 



REARING METHODS FOR WIREWORMS 



W. A. Rawlins, Cornell University 



WIREWORM rearing methods with a few minor modifications are 

 similar to those used for rearing other underground insects. In 

 the laboratory, salve boxes, petri dishes and moist chambers are usually 

 used as breeding cages for obtaining records of behavior and oviposition 

 of adults, and as rearing cages for growth studies of wireworm larvae. 

 Under outdoor conditions, clay pots, drain tiles, galvanized cylinders, 

 and barrels sunk into the soil have been recommended for wireworm life 

 history work. Caves and cellars as described by McColloch (191 7) 

 and Lane (1924) make excellent underground laboratories. Tempera- 

 ture and humidity in these chambers were similar to outdoor conditions 

 of the normal habitats of wireworm larvae. Bryson (1929) stated, how- 

 ever, that the cave method has not been as successful in the case of wire- 

 worm rearing as in white grub studies. He recommended unglazed drain 



