370 PROCEEDINGS OF THE ACADEIVIY OF [July, 



two lobes; cerci damaged. Cephalic coxse about two-thirds the length 

 of the pronotum and not extending caudad of the same; cephalic 

 femora slightly longer than the coxae, quite robust, external margin 

 armed with six short . irregularly placed spines, internal margin with 

 eleven spines, the majority of alternating sizes, largest 

 discoidal spines quite robust; cephaUc tibiae very 

 slightly less than half the length of the femora, armed 

 W-^r/ 1 ^^ ^^^® external margin with eight spines, internal 

 \\\lj[ I margin with about seven spines, terminal claw large; 

 cephalic metatarsi about as long as the tibiae, slender, 

 remaining tarsal joints about equal to the metatarsi 

 Fig, 2. — Yersinia "^ length. Median hmbs rather short, femora very 

 sophronican.sTp. slightly expanded proximad. Caudal limbs mod- 

 head. (x^O.) erately slender ; femora reaching to the apex of the 

 fifth abdominal segment, distinctly but slightly in- 

 flated in the proximal two-thirds ; tibiae equal to the femora in length, 

 very slender; caudal tarsi short. 



General color cinnamon-rufous, darkened on the dorsum of the 

 head and the median area of the pronotum; median line of the abdomen 

 Vandyke brown. Face burnt umber except antennae and mouth parts 

 which are pale ochraceous. Apex of abdomen washed with broccoli 

 brown, the tips of the terminal plates ochraceous. Limbs ochraceous, 

 tending to ochraceous-rufous on the median and caudal femora and 

 dorsal edge of cephalic femora. 



Measurements. 



Length of body, '. . 14 mm. 



Length of pronotum, 3.2 " 



Length of cephalic femur, 2.6 " 



Length of caudal femur, 5.7 " 



The unique type was found running actively about among the stones 

 of a bare hillside. 



LITANEUTRIA Saussure. 

 Litaneutria skinneri Rehn. 



A male specimen from the Grand Canyon, altitude 7,000 feet, Septem- 

 ber 11, 1907, belongs to this species, while another male, not quite 

 mature, from Tucson, July 26, is referred to it with some little doubt. 

 The Grand Canyon male has the tegmina slightly shorter than the 

 typical individuals of that sex, while the blackish tegminal maculation 

 of the type is absent. 



