
UTAH CHILOPODS OF THE GEOPHILID#., 
RALPH V. CHAMBERLIN. 
In this paper are presented descriptive accounts of six new 
species of chilopods belonging to the genera Geophilus and 
Linotzenia, four to the former and two to the latter. The 
material upon which the descriptions are based was collected 
for the most part during the spring and summer seasons of 
1901. By way of showing the position of the new forms in 
their genera analytical keys are given for the species here first 
described and also those known previously from the western 
United States. 
KEY TO WESTERN SPECIES OF GEOPHILUS. 
a,. Frontal plate discrete; last ventral plate wide. 
ġ Anal pores present; nei pores numerous; pairs of legs 
53-55 (9); length 50-53 m : i glaber Bollman 
Č, Anal pores absent; pleural "Tora two; pairs of legs 47-53; 
length 37-47 m . . cephalicus Wood 
a,. Frontal plate not disce! ; dnd aid present 
6,. Last ventral plate relatively narr 
cı Claw of anal legs obsolete ; pen pores ten or eleven ; basal 
plate free; pairs of legs 73 (3); length 39 mm 
fomir Meinert 
c, Claw of anal legs long; pleural pores eighteen or twenty; 
basal plate partly covered; pairs of legs 73-75; length 
49-55 mm neatotus sp. nov. 
€. Claw of Sem he shot or eS ; pleural pores nine ; 
pairs of legs 45-49; length 20-31 mm. xenoporus Sp. nov. 
c, Pleural pores thirty or more; basal plate partly covered; 
pairs of legs 64-67 ( 9); length 36 mm. cal eer Bollman 
6,. Last ventral plate relatively wide. 
c Claw of anal legs obsolete; basal plate thrice wider than 
long; pleural pores partly covered; coxz of prehensorial feet 
armed ; length 29 mm. (?) atopus sp. nov. 
€, Claw d anal legs short ; land R i times wider than 
long ; pleural pores free ; coxz of prehensorial feet unarmed ; 
length 40-43 mm. : - i . glyptus sp. nov. 
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