A i;.\( ' 1 1 M 1 > KS ACAKl N A. 47 



tur we have only one species ! referred to Limnochares i described by Ile\ 

 ilfii from Kott: another t'niin tin- same locality based upon leaf iialls and 

 called I'hvtoptus aiitii[iuis, and a third indicated merely ( Ararns) by I leer, 

 as found at Oeningen. i November, l^^l.) 



t has latterly described aiming the arachnids nf Tertiary Aix a 

 <it genera <.f Acarina with one species each which he regards as 

 belonging to the Trombidid.e. i October, isv.i 



Latreillc, 



N.I f. issil species have liel'oiv lieell referred to this p'lllis of a II \'\\ 1 lere 

 near it. The nearest is Acarns, \vliich is onl\' distantly I'elated. liehm^ini;- 

 indeed to a distinct snlit'aniily. 'Hie species of 1 \.>de.>, like other ticks, Iniry 

 thein>el\ > iii the ll.'-h of animals t<> suck their blood. \ November, 



IXODES TKKTIARIUS. 

 PI. li. Pig. II-'. 



'>< 1,-rtiariui Sciulil.-r, Xitt.-l, Haii.lh. ,1. l';il:r,.nt., I, ii, 7:!:!, Fi.i;. 90 



Although there are te\v definite salient points in the structure of the 

 single specimen known, its general appearance and its size make it tolerably 

 evident that it belongs to tin- l\odid:e or lucini and probably to Ixodes 

 proper. The bodv is of a very regular olmvate Conn, twice as lony as 

 broad, with a slight indication of a frontal shield of a triangular shape ( not 

 represented in the plate and perhaps illn-.ir\ :, formed by two snlcations 

 meeting at ri^ht angles and terminating just within the front pair of legs on 

 either side. The ntrnm is not preserved, but the ri^lit palpus (poorly 

 given on the plate) is slender and " J ' lon^. or rather pi-ojeclN hevond the 

 body to that amount. N'earlv all the le-> are present, but the hinder legs 

 of the left side have been crowded out of place -and appear 011 the right 

 side below those which properh belong there, and which apparently are 

 the upper four there seen. The legs are apparently complete, cxcc.pt the 

 terminal appendages, as they all taper rather rapidly at the end, after the 

 manner of ticks; they are stout, short, and of similar length, extending 

 beyond the body by about the width of the latter. 



Length of body, 3.5"""; breadth of same, 1.75 mm . 



Fish-Cut, Green River, Wyoming. Dr. A. S. Packard, No. 258. 



