16 H Canadian Arctic Expedition, 1913-18 
the group as a subfamily, Chilenophilinae, in the GeophiUdse, and in the same 
year also by Brolemann'^ who regarded the group as a subtribe, Ribautiina, 
under his tribe Geophilini. Since then the group has proved to be increasingly 
large and widespread. One genus has been previously recorded from Alaska, 
Arctogeophilus glacialis Attems being listed in the original accomit as occurring 
on both sides of Bering strait, namely, from Naniamo and Konyam bay on 
Seniavine sound on the Siberian side and from Port Clarence on the Alaskan. 
I suspect, however, that the specimens from the Alaskan side belong rather to 
the species described below as new, the two forms being very similar in size, 
structure and general appearance and both possessing thirty-nine pairs of legs, 
the two apparently to be distinguished only by critical examination. For the 
Alaskan species, after much hesitation, I have felt compelled to erect a separate 
genus, the only alternative being to assume that so experienced a student of 
the group as Graf Attems was mistaken in his observations on several characters 
of fundamental importance, which, in the absence of authentic material of his 
species I do not feel justified in doing. In addition, I have specimens of a species 
of a third genus from Forrester island, this being Gnatliomcrium yyielanonotum 
Wood, a form common from California northward through Oregon and Wash- 
ington into British Columbia. The position of the new genus among the other 
known genera of the Chilenophilidae may be indicated by means of the following 
key. 
KEY TO GENERA OF CHILENOPHILID^. 
a Anal legs with an additional article replacing the claw. (Lateral pieces of the labrum 
separated by the median piece.) 
h Co.xse of second maxilla; very broadly and completely fused. Ventral pores in four 
areas. Coxopleural pores small and very numerous both above and below. 
Telocricus Chamberlin. 
bb Coxge of second maxilkc separated or at most weakly united by a membranous isthmus 
c With no ventral pores; no finger-like process from distomesal angle of coxa of 
second maxillse. 
d A large lappet on coxa of first maxillse in addition to one upon succeeding 
article; prosternum without chitinous lines. Watophilus Chamberhn. 
dd Lappet present only on femuroid of first maxilla^; prosternum with chitinous 
lines. AUoschizotaenia Brolemann. 
cc Ventral pores present; a finger-like process at distomesal angle of coxa of second 
maxilla;; first maxilla; without lappets. Proschizotaenia Silvestri. 
an Anal legs without such additional terminal article in place of the claw, either bearing claws 
or when clawless composed simply of the usual six articles distad of the coxopleura. 
h Lateral pieces of labrum overlapping the median piece and in contact at the median line 
c Ventral pores present; lappets of second maxilla; rudimentary; coxa; of second 
maxillae wholly separated. (A clypeal area present.) Chilenophilus Attems. 
cc No ventral pores; lappets of .second maxillse well developed; coxse of second maxillse 
more or less clearly united. 
d No clypeal area present. 
e Palpus of second maxillse quadriarticulate. Arctogeophilus Attems. 
ee Palpus of second maxillse triarticulate. Gnathomcrium Ribaut. 
dd A clypeal area present. 
Palpus of second maxillse triarticulate; anal legs clawless. 
Cryophilus gen. nov. 
bb Lateral pieces of labrum not in contact at the middle line, more or less widely separated 
by the median pi(>C(>. 
c One or more clypeal areas present. 
d No ventral pores present. 
e Distoectal angle of tibia of palpus of second maxilhe prolonged and strongly 
chitinized. Gnathoribautia Brolemann. 
ee Distoectal angle of tibia of s(!Cond maxillae not thus prolonged. 
Taiyuna Chamberlin. 
1 "A propos d'un Systeme des Geophilomorphes," in Arch, de Zool. Exp. et Gen., 1909, ser. 5, 
3, p. 327. 
