34 



>RK STATE MUSErM 



life cycle of 5 to 6 weeks. The human flea devdc^ somewhat 

 more rapidlj^ the egg stage being given as f rcwn 4 to 6 days, the 

 larval period 11 days, and the duration of the pupal stage 12 days, 

 making a generation possible in 4 to 6 weeks. The Indian rat flea^* 

 has an egg period in India of 2 days, though in California, accord- 

 ing to 3klitzmain,~* it may Tary from 9 to 13 days, while the usual 

 larral esdstence, 8 to 24 days as given by American and English 

 authorities, is extended in Cahfomia under laboratoiy conditi<Mis 

 to rarely less than 28 and even 30 days, and sometimes longer. The 

 adults of this species may live on rats in India for 41 days, the 



¥lc. Z2 Cat affid m»g lea. seeim trasm t&e side, eaSaxsEd. iA.'st^ars iShs^tnsiJiamli 



maximum on an exclusive didt of human :: : 1 for fliat locality 



being 27 days, diough in CaKfomia the sfr ^ 7 be kept afire 



under such omdititMis for 36 days. Fleas i.^ t 'n bran in the 



absence of liquid food for 6 days, zui :r_ si:. 1 moist cow 

 i 13 days. 



:-' is most suitable iiT tt 1t : : tnr a:id nndis- 



: 51 in buildiiigs and s: T : ^rf ;ir : ^r :i :r- 



T 7 siom of setting buiii :;^ - : : ::e dis- 



T : r ground, prevaleat i: t ^ . _ "^7*^^" 



: : : :?, dogs and other a:: t t t : tr a 



usiiaiiV dry soil, affords almost hiz t - 



ment of these pests, and sometimes ir. ._ . ^z z .- .z : : ::. 



of adiacent lawns. 



cheopis Rolli. 

 jSl 1910. 



