1913.] NATURAL SCIENCES OF PHILADELPHIA. 303 



more than half the length of the seventh segment, ninth segment 

 distinctly longitudinal, slightly longer than the eighth segment, 

 marinate, distal margin rectangulate-emarginate mesad, rounded 

 laterad; supra-anal plate rectangulate, merely the apex extending 

 caudad of the ninth segment; cerci acute, terete, not a third the 

 length of the ninth dorsal segment; subgenital plate enormously 

 elongate, the length equal to that of the five proximal abdominal 

 segments, of this length two-thirds is distad of the real apex of the 

 abdomen, V-shaped in section, compressed, acute, carinate ventrad. 

 Cephalic femur longer than the pro- and mesonotum together, 

 proximal flexure pronounced, carina subcristate; cephalic tibiae 

 slightly exceeding the femora, slender, moderately compressed; 

 cephalic metatarsi slightly longer than the remainder of the tarsal 

 joints. Median femora very slightly shorter than the mesonotum; 

 median tibiae very slightly longer than the femora; metatarsi slightly 



Fig. 9. — Xiphophasma missionum n. gen. and sp. Lateral outline of apex of 

 abdomen of type. (X 1|.) 



shorter than the remainder of the tarsal joints. Caudal femora 

 reaching to the distal margin of the fourth abdominal segment; 

 caudal tibiae hardly longer than the femora; caudal metatarsi very 

 slightly longer than the remainder of the tarsus. 



General color burnt umber, the head, pronotum, cephalic half of 

 the mesonotum, apex of the abdomen and the limbs dusted more 

 or less thickly with hoary white; antennae seal brown; eyes tawny 

 olive. 



Measurements. 



Length of body 118 . mm. 



Length of head 7.8 " 



Length of pronotum 4.8 " 



Length of mesonotum 27. " 



Length of metanotum (including median segment) 21 .5 " 



Length of cephalic femur 35.5 " 



Length of median femur 26.3 " 



Length of caudal femur * 30.5 " 



Length of subgenital plate 41.5 " 



The type of this very interesting genus and species is unique. 



