ENTOMOLOGY

DISEASES CARRIED BY FLEAS 855from canine kala azar, which suggests to some writers the insect originof that disease. Fantham, however, does not consider this organismrelated to Leishmania.Leptomonas ctenophthalmi (Mackinnon) is described as a parasiteof Ctenophthalmus agyrtes.Leptomonas ctenopsyllae (Laveran and Franchini) occurs in the gutof Ctenopsyllus musculi.Leptomo1UJ,s debreuili (Brumpt) is 0. parasite in the squirrel flea.Leptomonas pattoni (Swingle) is 0. native to Ceratophyllus fasciatus,C. lucifer, and Xenopsylla cheopis. According to Fantham and Porterit has been found naturally in the blood of mice. Ingestion of feces offleas infected with this organism has caused death or disease in whitemice, according to Laveran and Franchini (1914).Mastigophora: Spirochaetacea: Spiroclw,etidaeSpiroschaudi1llT/,ia ctenocephali (Patton) has been described fromCtenocephalus canis in India.Telosporidia: Gregarinida: .Agrippinidae.Agripp~ bo1UJ, Strickland occurs in the gut of the larvae of the ratflea, Ceratophyllus fasciatus in England.Telosporidia: Haemogregarinida: HaemogregarinidaeHaemogregarilna (HepatolJoon) jacmi Balfour, the cause ofANAEMIA of the jcrboas, Jaculus gordoni and J. orientalis, is thoughtto be carried by the fl;a Xenopsylla cheopis. Balfour noted large cystsin X. cleopatrae which Christophers thinks possibly belong to thisspecies.MetazoaPzatyhelmia: Cestoidea: Cyclophillidea: TaeniidaeDipylidium canilwwm (Linnaeus), the DOG TAPEWORM, has for itsintermediate hosts the dog flea, Ctenocephal'US canis (Curtis) Baker, thecat flea, C. canis felis (Bouche), and the human flea, Pule:r: irritansLinnaeus. It may also be carJ'ied by the dog louse Trichodectes latus(canis). Neumann, however, regards the fleas as most important. Theripe proglottids which contain the eggs of the tapeworm. by their ownmovement, pass through the host's anus and get into the fur where theybecome partly dried and disintegrated and fall. to the ground. Part of