BIOTIC ASSOCIATIONS OF COCKROACHES— ROTH & WILLIS 427 



Spencer, B. , >t t j 1 



1892. A trip to Queensland in search of Ceratodus. Nature, London, vol. 



46, pp. 305-310. 

 Spencer, G. J. , , r. •.; 



1943 On the oviposition habits of the Australian cockroach, Penplaneta 



australasiae (Fab.). Proc. Ent. Soc. British Columbia, vol. 40, PP- 



29-30. 



Spinelli, a., and Reitano, U. .,11 



1932. Ricerche suUe blatte, quali agenti di difJusione dei germi del colera, 



della febbre tifoide e della dissenteria bacillare. Ann. Igiene, vol. 



42, pp. 745-755- 

 Sprague, V. 



1940. Studies on Gregarina blaffarum with particular reference to the 



chromosome cycle. Journ. Parasitol., vol. 26, No. 6, Suppl., pp. 

 26-27. 

 1940a. Observations on Coelosporidium periplanetae with special reference to 

 the development of the spore. Trans. Amer. Micr. Soc, vol. 59, 



pp. 460-474. , . ^ ,, 



1941. Studies on Gregarina blattanm with particular reference to tne 



chromosome cycle. Illinois Biol. Monogr., vol. 18, pp. 1-57. 

 Sprague, V., and Ramsey, J. 



1941. A preliminary note on Plisfophora kiidoi n. sp., a microspondian 



parasite of the cockroach. Anat. Rec, vol. 81, Suppl., pp. 132-133- 

 (Abstract.) 



1942. Further observations on Plisfophora kudoi, a microsporidian of the 



cockroach. Journ. Parasitol., vol. 28, pp. 399-4o6. 



Stage, H. H. , . , . • 1 -n 



1947. DDT to control insects afifecting man and animals in a tropical village. 



Journ. Econ. Ent., vol. 40, pp. 759-762. 

 Stahnke, H. L. 



1949. Scorpions. 23 pp. Tempe, Ariz. 



Stamm, R. H. . ,^ , . >, XI 



1936. A new find of Rhipidius pcctinicornis Thbg. {Symbins blattarum 

 Sund.) (Col. Rhipiphor.). Ent. Medd., vol. 19, Pp. 286-297. 



Stay, Barbara. ^^, . _, ^., . 



1957. The sttrm\ scent gland oi Eurycotis floridana (Blattana: Blattidae). 



Ann. Ent. Soc. Amer., vol. 50- PP- 5I4-5I9, i pl- 



Stein, F. von. , ^, - , -,17. tij- j 



1848. Ueber die Natur der Gregarinen. Arch. Anat., Physiol. Wiss. Med., 



1848, pp. 182-223, I pl. 

 i860. Ueber die neue Gattung Lophomonas. Sitzungsb. K. Bohm. Ges. 

 Wiss. Prag, i860, pp. 49-50. 



Steinhaus, E. a. . , , . • r • 4. 



1941. A study of the bacteria associated with thirty species of insects. 



Journ. Bact., vol. 42, PP. 757-790. 

 1946. Insect microbiology. 763 PP- Ithaca, N. Y. 

 1949. Principles of insect pathology. 757 PP- New York. 

 1959. Serratia marcescens Bizio as an insect pathogen. Hilgardia, vol. 28, 

 pp. 351-380. 

 Stevenson, C. 



1905. The Blattidae of Montreal. Ent. News, vol. 16, p. 98- 



