loS One Thousand Objects 



particularly interesting associate, appealing to the head 

 rather than to the heart. 



882. BODY-COMPANION (Pediculus vestimenti). Fortu- 

 nately, not so common as the last ; but amongst dirty spe- 

 cimens of humanity this parasite is by no means extinct. 



883. DOG TICK (Ixodes ricimts). This and other ticks 

 are found on dogs; they are of considerable size. The 

 body is shortly oval, almost spherical, of a darkish violet 

 tint, with brown legs. (PI. XII., fig. 12.) 



884. SHEEP TICK (Ixodes rednvhis). This is not what 

 is commonly denominated the Sheep Tick, which belongs 

 to a different order. The present creature is of a pallid 

 yellowish-red colour, with black legs. 



885. SAND-MARTIN TicK (Ixodes phimbeus), The body 

 of a leadc-u colour, with a heart-shaped shield. It is not 

 uncommon in the nests of the Sand-Martin. 



886. HEDGEHOG TICK (Ixodes /lexagonus). The body 

 is whitish or of a pale lead-colour, with a hexagonal shield. 



887. SMALL HEDGEHOG TICK (Ixodes megathyreus), a 

 smaller species, is also found on the same animal, of a 

 brown colour, with an obovate shield; and both are occa- 

 sionally found together. 



888. GREAT TIT TICK (Ixodes pari).T\\\s tick is 

 altogether brownish, with an elongated, somewhat hexa- 

 gonal shield. Found in the spring, on the Great Tit. 



889. POINTER TICK (Ixodes autumnalis). A rare tick, 

 found in the autumn occasionally on pointers, with a lead- 

 coloured abdomen marked with three obscure lines, and 

 the rest of the body of a rusty brown. 



890. Ticks are also found on deer; and one, which we 

 have not seen described, has been taken from the mole. 

 No one has hitherto paid much attention to them in Eng- 

 land since the days of Leach. 



891. SPARROW MITE (Tyroglyphus sp.}. A mite which 

 is common on the bodies of sparrows and finches. (PI. 

 XII., fig. 15, male; fig. 16, female.) 



892. CAGE-BIRD MITE (Dermanyssus ariinri) occurs 

 on many small birds, especially singing-birds confined in 

 cages. 



