AGRTOLIM.AX LJiVIS CAMPESTRIS. 



];].') 



Var. tristis Cockerel), op. cit. 



Anijial very ilai k-bniwn or brown-bUiek, This form, whicli iii its colouring is 

 nearly alliei! to var. htipirhdrcii, isfoniid cliietly at liigh elevations in the iiKiiiiitariis. 



Tlie eflect of liviiii;- under the extreme e(]ii(Ution,s fouiiil at lii,ul] altitudes upon 

 the pigmentation of this species, i.s shown hy tlie darkest forms lieing most )ireva]ent 

 in the highest elevated localities, and is corrcihorateil hy the darl; e(ilour of the mw. 

 Jijllin-hurrd, fonnd on the Arctic shores of Siheria and M'orth America. 



Sumndt (.' 



and Jlclt.a Co. 



Fic. 151. — Median, 

 and marginal teclh uf 

 l,y/.c,-lH„r,L<, higldy ,„ 

 (alter IJinne)'), 



Colorado—.!, i-rimprstria var. ii-i.-dis. Lake ( 

 (T. I). A. Cockerel!, Nautilus, Jan. ISIII), p. 100). 



Var. hyperborea Westl., Xucliriclit. Dcut.sdi. Mai. (les., Sept. IsiG, p. !)7 



LiinnA' kypcrhL-^icus \Vi;slcidund, i.ip. cit. 



Body lirm, lihiek above, sides paUu-, ]iale lieneath, 

 back convexly roninled, narrowing belaud, tail short, 

 compressed and subcarinate above ; SHIKI.D bro.adly 

 rouniled Ijehiud, thicker and nmcli wdder in front, inner 

 margin rellexed. Long., 10 mill. ; hit,, .'5 null. 



iN'iMilLN.VLLY, it is described by IJiuney as possessing 

 a smooth arched jaw, with a blunt median ]irojection ; 

 EADULA with a formula of 42 + 1+42 teeth, the centrals 

 tricuspid; laterals twelve in iinmber and bicuspid; mar- 

 ginals about thirty, sinrply acnleate or with a bifurcation or side-spur. 



Siberia— Nordeiiskiijld and Stuxberg found it at t ;m()scliinskiij, Oli' 17 

 lat., lui [Sept. 10, IST.'i; and on the island Sopotschnoj, in the Jenissei river. 

 on Aug. 29, 187o (Westerlnud, op. cit.). Dr. Tlieel collected it at Tolsloinos, ^Vug. 

 1876, and according to Westerlund it is reeonled as Arimi ritcr bv Gerstteldt from 

 Eastern Siberia (id., yiber. LaTid Sotvatt. Moll., jip. 102 and 110). Dr. Dall also 

 records that it was found by Stejuegi'i- ami by the Vega Exiiedition on the (.'oni- 

 mander Islands. It is said to be found also in Kamschalka (Pi'oc. U.S. Nat. JIus., 

 18.S6, p. 217). Tscbnksi-his Peninsula (Simroth, I'ortng. -Azor. Fauna, ISIll). 



Nearctic Region — Found thnuighout the Arctic shores of North Amerira, and 

 on the Aleutian ami llehiing Islands (Dall, oji. cit.). 



Labrador — Not uncommon on May 16th, 1883, ami July 23rd, 1S84, under stones 

 in moist places in willow thickets, etc., about Fort Chinio, ITngavo l!ay (Dall, op. 

 cit., p. 203). 



United States— Quincey. Calibunia, 1S89, 11. F. Wickhani CV. D. A. Cockcrell, 

 J. of Alak, 1897, p. 4). 



/,/, 



north 



ro" .r. 



-Hanks of Leeds and Liverpool Canal, near Kirl<slall, a fav 

 .-ij^rio/inta^ /u^z'is {pWAo. by ^L^ R. Mack.iyl. 



-lurite locality frir 



