T^^hhJ" ^^^^^'2 laboratory experiments, larvae fed on dors and 



doEs'a^d iSs" jIS' '''^'"^^^^ ^' hedgehogs, and adul?f o^' 

 dogs and jackals. Lar^^ae commenced feeding three to seven days 

 after emergence, nymphs began about the sa^e length of Ume Ster 

 ^Itzng, and adults about a week after molting. Lar^L f ed ifr 



6l°C ?o"0Oc T'V'^i^H 'T '^^^^ (temperature r^^gS fro" 

 DO 0. to 20^C.J. Nymphs fed for three to eleven days fmostlv 

 four days), on the dog or Jackal; but when hedgehogs werHsed 

 the feedxng txme (ten to seventeen days) was abou^douSed? ^ 

 (temperature ranged from SOQ . to ISOQ . ) . Females fed from one 



^ni^^^'/r""" i"?'^^y "^^^^ ^^y^) b^t males remained auLhed 

 xndennztely and transferred to another host if the first^mal 



are of? .^^J^^ ^^ated, the length of intervals during which ticks 

 are off the host appears to be influenced by temperature (thoSh 

 more exact and extensive research is certai^y reqSrS) In 



af 3^C \uf ''' ''''. Sf ^'^' '" '"°^ ^^-"^-" to'^net^en days 

 rlnlr-' ? ^^q^^^ed 75 days at 120c. Larvae molted to nympS 

 from five to eight days after completing feeding (at 300cT a^d 

 nymphs molted to adults in eleven or twelve dayl ^\er fe;kg ' 

 ;r ^"^'i* Oviposition commenced three to six days (averare 

 at^'oor.'b;:^ ^lltll '^^^^^ '^'^ ^^^ ^°^^' wL^mSnTa^ned 

 £gl^5;g Stel f^'r'fro'^niSTrSf^:^^^^^^^^ ^^^^ '' '^^'' 



in Jlttlll\7ll^'. ^'^^^./^^^^^ble conditions, may be completed 



nrol nn^i^^ ^ ^^^f^ ^^'^^'' Unfavorable conditions, it may be 



prolonged for many months. ^ "°-y u« 



/"By way of contrast to Nuttall's findings and because the 

 InTrtf °f,^^i^^°Ph--- (19073) .'are not complete Ld do not 

 SaSe nQ/O ^^:^P\^^ture at which the specimens were reared", 

 ftlf Ji^i. undertook similar experiments in India at 7500 



NnS.^ ?^/^^^ ^°S' "^^ ^° ^^ the hosts for aTL stages. 

 Nonfeedmg ticks were observed at 220c. (eight degrees Wr 



,!i!^"^^^."^^!^^^^°^ ^^^ ^^^" reported for Ornithodoros arenlcolo.,. 

 whose females feed on mice for A5 minutes but on hedgehors i'or 70 

 nunutes (average), and whose males feed on mice for Ir^nutef^ 

 on hedgehogs for 57 minutes (average) (Hoogstraal I^cf 



- 705 - 



