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U '0 o L( I 3: 0 I C) I I Cn I 0 O --t sC14IE I $.. on 4 co OHC: 00 0 4.3 0cn 10 to m "4 "44 U "r4H ,-%r- H- z 01 0 w 4.3 4) co (A a co 0 0 <"4 0 0-40 "40 10 co go0.. 0 r- Cd O0 0o" 0 1044 fi C 0 0 ".44.i '4 .0 0 " 4) to V0 9 C.) "4) > 4- CD r!C- $.000 0 co 4 04 1e 0 3 040 0. $ C , ~ 02 I I 0- 10 0c .4 0o to A., m u 4.3 :3 "-4 -4 1-4 PON "4 0co ".4 m r-4 ow :3 o X 0 u no 01 1-4 "4 0 .14 C: 0 :3 0) u 04 284 ABSTRACTS Mary Ann Strand Akopyan, M. M. (1968). Parasitic castration of the flea. In: N. D. Levine, ed. & F. K. Plous, jr, tr. Natural nidality of diseases and questions of parasitology. Urbana, Univ. Illinois Press, pp. 399-401. The nematode Mastophorus muris caused castration of male Ceratophyllus laeviceps. The castrates made up an average of 15.5% of the collections. In other reports from the USSR, more than 50% were castrates. Helminths including roundworms and tapeworms are also reported to cause castration in fleas. Amonkar, S. V. & Munshi, D. M. (1965). On the presence of leptomonads in the digestive tract of the Indian rat flea Xenopsylla cheopis (Roths). J. Anim. Morphol. Physiol., 12(1): 32-41. The appearance of various forms of leptomonads in the rat flea are described. The leptomonads are morphologically indistinguishable from Leptomonas ctenocephali described from dog fleas. The dialaled pyloric region of the ileum of infected fleas is found to be practically blocked by a large number of these flagellates. Beaucournu, J.-C. & Chabaud, A. -G. (1963). Infestation spontan6e de puces par le spiruride Mastophorus muris (Gmelin). Ann. Parasitol. Hum. Comp., 38: 931-934. The flea Ctenophthalmus avernus, collected in France was found to be infected by M. muris. The nematode was also found in field mice which were hosts to the fleas. Although this nematode has been experimentally transferred to insect hosts, it has been rarely found infecting insects in nature. Jenkins, D. W. (1964). Pathogens, parasites, and predators of medically important arthropods. Bull. WHO,30 (Suppl.), 150 pp. The following papers were cited by Jenkins. Information for the flea pathogen table was derived from Jenkins' listings.