35 



did grow in a special semi -solid medium. In subsequent 

 attempts, however, the same organism was isolated directly 

 on glucose agar. Coryne"bacterium paurometaholum appeared 

 to "be constantly associated with the "bedhug. 



During the same investigation an unidentified diphther- 

 oid was isolated from the alimentary tract of the larvae 

 of the bagworm, Thyridopteryx ephemeraef ormis . The two 

 diphtheroids were similar in many respects, differing in 

 a -few minor characteristics. 



*Steinhaus, E. A. 19^1 A study of the "bacteria associated 

 with thirty species of insects. J. Bact. , k2, 757-790. 



CORYN EB ACTER I UM PER 1 PLAN ETA V A R . AMER I CAN A G-laser 



Insect concerned: The American roach, Periplaneta ameri - 

 cana. 



From the fat "body of the American roach, Periplaneta 

 americana , Glaser (1950a) isolated and cultivated a 

 diphtheroid hacterium which he named Corynebacterium peri - 

 planetae var. americana . Soon after this he (1930b) cul- 

 tivated a similar bacterium, Corynehacterium blattelae, 

 from the German roach Blattella germanica . Gier (1936) 

 has reported negative results in his attempts to cultivate 

 the microorganisms found in the "bacteriocytes of the roach 

 fat tissue. Glaser explains the failure of other workers 

 to duplicate his results as pro"ba"bly due to faulty tech- 

 nique (see Steinhaus, 19^0, p. ho) . 



For a "brief description of this organism see Bergey's 

 Manual, 5th edition, p. 798. 



Gier, H. T. 193& The morphology and "behavior of the 

 intracellular "bacteroids of roaches. Biol. Bull., Jl, 

 k33-k52. 



*Glaser, R. W. 1930a On* the isolation, cultivation and 

 classification of the so-called intracellular "symbiont" 

 or "rickettsia" of Periplaneta americana . J. Exptl. 

 Med., 51, 59-82. 



Glaser-, R. W. 1930b Cultivation and classification of 

 ""bacteroids," "symbionts," or "rickettsiae" of Blattella 

 germanica . J. Exptl. Med. , 51, 903-907. 



Steinhaus, E. A. I9U0 The microhiology of insects with 

 special reference to the "biologic relationships between 

 bacteria and insects. Bact. Revs., k, 17-57* 



