Biology of H. coiichma 545 



were encountered in November-December of 1912 and 1913. All stages 

 were most numerous in March and April, usually few or none being 

 encountered later. Observations for the 4 months May-August are 

 lacking. In one instance (April, 1912) the number of ^Ts greatly 

 exceeded that of the $s encountered on one host. 



On two hedgehogs, examined at Chantilly (27. vi. 1911 and 6. VI. 1912), 

 he found immature stages only: 15 nymphs and 64 larvae, and 

 19 nymphs and 174 larvae respectively. 



Insect parasites of H. concinna. 



Brumpt has several times found the nymphs of H. concinna at 

 Chantilly and Fontainebleau to be infested with Ixodiphagus caucurtei 

 du Buysson (see p. 547). Under experimental conditions, the nymphs 

 were readily attacked by the chalcidid but only about 2-4 per cent, 

 became parasitized. 



Haemaphysalis inermis. 



The biology of this species has been studied by Dr E. Brumpt of 

 Paris who has kindly placed his notes at my disposal thus enabling me 

 to compile the following account of the life-history of H. inermis. 



Brumpt finds that the adults, which are very active, occur commonly 

 on deer in France during the months November to April inclusive. 

 They quickly abandon the host and readily reattach themselves to the 

 hedgehog or dog in the laboratory. The ticks occur in all situations 

 upon the host but they attach themselves by preference, as does 

 /. ricinus, in places where the skin is thin. On deer, they occur in the 

 axillary and inguinal regions and occasionally upon the ears. 



H. inermis requires three hosts upon which to feed in the larval, 

 nymphal and adult stages respectively. Both sexes occur upon the 

 host on whom copulation takes place. Brumpt has never found the 

 sexes attached at the same spot on the host as is usually seen in 

 H. concinna. 



Time the tick remains upon the host (Laboratory 



experiments). 



The Larvae, when a week old, attach themselves immediately in any 

 situation upon the host, be it either a mammal (hedgehog, mouse, rat) 

 or reptile (lizard) ; they gorge very rapidly, some being replete in 



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