Jieio Species of Ticks. .'501 



grooves is present beliiiid and in line witli the ccrviciils, ami 

 sonit'tiines almost continuous with thein; on each side ot this 

 nosti-rior pair of grooves there is a lateral impression, which 

 IS well marked in some examples, but indistinct in others. 

 I'unctures fairly numerous, but not very deep, and rather 

 unequal in size (fi;;. 2). 



Sliffiiiata almost comma-shaped. 



Jiostrum rather shoit. I'orose areas deep and oval in 

 sliape. llypo-tomc with three files of teeth on each sidf. 



I^egs. — Armature of the coxa3 of the legs similar to that of 

 the male. Tarsus of fourth leg of different shape to that of 

 the male ; it is stout, rather strongly convex dorsally, and the 

 slope is long but not very steep, the apex being narrowed. 



Colour. — Body dark brown above, the ventral surface 

 yellowish-brown. Scutum very dark brown, with irregular 

 pale patches (wliich are only visible in the dry examples). 

 Legs the same colour as the scutum and with the distal ends 

 of tiie segments ringed with white. 



Measurements in mm. — Length of body 4, width of body 

 2*75; length of scutum 1'12, width of scutum I'G ; length 

 of rostrum "9. 



Material. — Three males (one of which is the typ^') and two 

 females, found on an A mbl t/rhi/ nckus cristafAts from Alhemnrle 

 Island, Galapagos. Three females (and also several nymi)h3 

 and larva?) from an Amldyrhynchus cristatus labelled Gala- 

 j)agos (exact locality not given). Two dry female specimens 

 Irom ISt, Paul's Lsland, which were collected by Ciiarles 

 Darwin, and two dry females labelled Galapagos, also collected 

 by Darwin. 



liemarlcs. — The specimens collected by Darwin were iden- 

 tified by Prof. Neumann as A. hirlum, Nn. The male of 

 A. daru:ini, sp. n., is very unlike that of A. hirtum {cf. 

 Neumann's fig. and our fig. 1). The scutum of the female of 

 A. daricini is \ery much smoother than that of A. hirtum, 

 and the punctures are not so deep and are further apart. 

 We may remark here that all the specimens of A. hirtum, 

 Nn., were collected by Darwin ; according to his labels both 

 the species under discussion occur on St. Paul's Island. 



Ambli/omma boulengeri, sp. n. 



(J. — Scutum longer than wide, and slightly narrowed 

 anteriorly. Punctures numerous and very tine. Anterior 

 part ot cervical grooves deep and slightly curved ; posterior 

 part very slight and inconspicuous, divergent fri)m tiiat of 

 ihc oi)positc iri'le, and extending us far backwanls as the 



