Ot 
1912} Chilopods and Diplopods i: 
Last dorsal plate margined laterally, caudal margin convexly 
protruding. 
Sternal plates elongate, narrowed caudad the caudo lateral corners 
obliquely excised. (See Pl. XIII, fig. 5). Each with a distinct longi- 
tudinal median sulcus and submarginal sulci. 
Pseudopleura produced caudad into an acutely pointed process; 
porose ventrally; armed ventrally and laterally with spines. 
Legs sparsely armed with spinescent bristles which appear spine- 
like especially on proximal joints. A stout spine at distal end of tibia 
dorsal in position and a second one ventral. Tarsi, excepting the 
ultimate, one-jointed, a stout ventral spine distad of middle. 
Prefemur of anal legs armed with rows of spines on mesal and ectal 
surface and on most of the ventral. Femur similarly armed mesally 
and ventrally. The tibia with similar spines ventrally. Tarsus com- 
posed.of but two joints and ending in a distinct and very stout claw. 
Type: Kethops utahensis Chamberlin. 
The type species was originally described from Utah under 
the genus Newportia, the absence of anal legs from the type 
specimen leading to the reference to this genus. While close to 
Newportia, it has various Cryptops-like characters and is 
readily separated by the character of the anal legs, etc. A 
short time ago among some old material from New Mexico 
sent me by Prof. Cockerell, a perfect specimen of the form was 
found, making possible the diagnosis given above. A descrip- 
tion of this specimen follows: 
Kethops utahensis Chamberlin. 
Ferruginous, uniform; antennze and legs, excepting the ultimate 
pair, paler, yellowish; anal legs colored like the body, but pale distad. 
Head coarsely punctate, two diverging longitudinal sulci on the 
caudal portion which begin at a transverse sulcus in front of and parallel 
the caudal margin. 
Antennz composed of seventeen articles. 
First dorsal plate with semi-circular impression deep, somewhat 
angularly bent caudad at middle, mesal portion in a broad depression 
or pit on the caudal slope of which there is a distinct W-shaped mark 
like that found in many species of Newportia, the two usual longitudinal 
sulci over caudal portion of plate. 
Sulci of second plate strongly diverging caudad, those of the suc- 
ceeding plates nearly parallel. 
Last dorsal plate without distinct sulci; caudal margin convexly 
‘ bowed out; lateral margins armed with two rows of spinules. (See PI. 
RT, fis. 3). 
Anterior margin of prosternum straight or nearly so, but slightly 
indented mesally. Prosternum punctate, two sulci, which, approximate 
below, diverge distad toward the free margin. 
