BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS 413 



1950. Insecticidal properties of some plants growing in Puerto Rico. Fed- 

 eral Exp. Stat., Mayagiiez, Puerto Rico, Bull. No. 49, 17 pp. 

 Plank, H. K., and Winters, H. F. 



1949. Insect and other animal pests of Cinchona and their control in Puerto 

 Rico. Fed. Exp. Stat. Puerto Rico, Mayagiiez, Bull. No. 46, 16 pp. 

 PococK, R. I. 



1893. Notes upon the habits of some living scorpions. Nature, London, vol. 

 48, pp. 104-107. 

 Pope, Pauline. 



1953. Studies of the life histories of some Queensland Blattidae (Orthop- 

 tera). Part i. The domestic species. Proc. Roy. Soc. Queensland, 

 vol. 63, pp. 23-46. 

 l9S3a. Idem. Part 2. Some native species. Proc. Roy. Soc. Queensland, 

 vol. 63, pp. 47-59. 

 Porter, Annie. 



1918. A survey of the intestinal entozoa, both protozoal and helminthic, 

 observed among natives in Johannesburg, from June to November, 

 1917. South African Inst. Mem., No. 11, pp. 1-58. 



1929. Some remarks on the hookworm problem in South Africa. South 



African Journ. Sci., vol. 26, pp. 396-401. 



1930. Cockroaches as vectors of hookworms on gold mines of the Wit- 



watersrand. Journ. Med. Assoc. South Africa, vol. 4, pp. 18-20. 

 Porter, J. E. 



1958. Further notes on Public Health Service quarantine entomology. 



Florida Ent, vol. 41, pp. 41-44- 

 Portielje, a. F. V. 



1914. Uit het reptielenhuis van "Artis." (In Dutch.) De Levende Natuur, 



vol. 18, pp. 557-563. [Pertinent sections translated by J. H. 



Vanderbie.] 

 Poulton, E. B. 



1917. Predaceous reduviid bugs and fossors, with their prey, from the S. 



Paulo district of south-east Brazil. Proc. Ent. Soc. London, 1917, 



pp. xxxiv-xli. 

 1926. A Nyasaland pompilid with unusual prey. Complete recovery of prey 



after being stung. Proc. Ent. Soc. London, 1926, vol. i, pp. 12-13. 

 Pound, C. J. 



1907. Bacteriological report. II. Interesting observations in connection with 



the possible accidental transmission of plague from rat to rat by the 



agency of cockroaches. In Ham, B. Burnett, Report on plague in 



Queensland, 1900-1907. Queensland Dept. Publ. Health, Brisbane, 



p. 161. 



Pradhan, S. 



1957. The ecology of arid zone insects (excluding locusts and grasshop- 

 pers). In Human and animal ecology, arid zone research, vol. 8, 

 pp. 199-240. 

 Pribram, E. 



1933. Klassifikation der Schizomyceten (Bakterien). 143 pp. Leipzig and 

 Wien. 



