TICKS, 



193 



CASE mowing and drying of the grass a very troublesome and disagree- 

 able operation to the labourers. We imagine that this is the species 

 spoken of by Mr. Gulliver as troublesome in Kent, and which he 

 supposes to be Ixodes Dugesii. 



No. 11. Ixodes ricinus {Koch^ Arachnidse). — 11. Enlarged figure of ditto, copied 

 from Koch's figure. 



A great deal of confusion seems to exist as to which species is 

 the true Ixodes ricinus of Linnasus. We have endeavoured to 

 unravel it without much success. On examining the species in 

 the Linnsean Collection in the possession of the Linnaean Society, 

 we find that the specimens stand almost without exception 

 unnamed. Among them, however, there is one (unnamed) that 

 corresponds with Koch's 'figure of Ixodes ricinus^ and we there- 

 fore fancy that that figure may be taken as representing the true 

 ricinus. 



No. 12. Ixodes reduvius {^Atid.^ Ann. Sc. Nat. 1832.). — 12. Enlarged sketch of 

 ditto, copied from Audouin's figure. 



A French species, which comes near that which we have above- 

 named marginatus. 



No. 13. Ixodes trabeatus {And. loc. cit.). — 13. Enlarged sketch of ditto, copied 

 from Audouin's figure. 



Another French species, distinguished by the anterior half of 

 the body being black, and the posterior red. 



Nos. Ixodes bovis {Riley). — 14. Enlarged figure of male ; 15. Enlarged figure of 

 16^.^' female; 16. Specimen of ditto (i). 



We have taken our sketch of the male from a figure given by 

 Mr. Riley, in the appendix to Professor Hayden's Geological 

 Report on Montana, Utah, &c., for 1872. And that of the 

 female, from a specimen (No. 16) that we took off the neck of a 

 miner in Utah, a portion of whose skin may still be seen adhering 



