1909.] NATURAL SCIENCES OF PHILADELPHIA. 123 



quite blunt at the apex. Limbs slender, the femora, particularly 

 the caudal, very slightly bowed dorso-ventrad. Cephalic femora 

 but slightly shorter than the head, pronotum and mesonotum 

 together, proximal flexure rather sharp ; cephalic tibiae surpassing the 

 head and thorax in length. Median femora when extended caudad 

 reaching to the middle of the second abdominal segment; median 

 tibiae slightly longer than the femora. ' Caudal femora reaching to the 

 apex of the sixth abdominal segment; caudal tibiae slightly longer 

 than the femora; caudal tarsi with the proximal joint about two- 

 thirds the entire length of the same. 



General color very pale greenish, becoming buff on the venter and 

 limbs, the head and pronotum ochraceous-buff mesad, a white lateral 

 line extending caudad from the antennae, bordering the eye dorsad and 

 becoming obsolete on the sides of the pronotum. Apex of the abdomen 

 cream-buff, slightly washed with ochraceous-buff. 



Measurements. 



Length of body, 65 mm. 



Length of pronotum, 2.7 " 



Length of mesonotum, . 17 



Length of metanotum (including median segment), . . 13.3 



Length of cephalic femur, 21 



Length of median femur, 18 



Length of caudal femur, 23 



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The unique type was taken on bunch grass on the east slope of the 

 mountains. Upon being approached it violently shook the stems to 

 which it was clinging, apparently to conceal itself or frighten away its 

 enemies. Upon experimenting we found the insect would repeat this 

 performance as often as approached. 



DIAPHEROMERA Gray. 

 Diapheromera persimilis Caudell. 



Two females, one mature, the other not quite mature, taken on irri- 

 gated land along the Rio Grande near El Paso, July 10, are referred 

 to this species ; the mature individual was swept from tornillo or screw 

 bean, the other from thick weeds. After a careful study of the species 

 of the genus, a tabulation of their more important character in the 

 female sex, and of their measurements, we have reached the conclusion 

 that this species described from the vicinity of Brownsville extends 

 up the Rio Grande valley at least as far as El Paso. The cerci of the 

 specimens in hand fully answer CaudelFs description in being inter- 

 mediate in length between those of jemorata and veliei, while the 



