1911.] NATURAL SCIENCES OF PHILADELPHIA. 333 



contained about three and one-half times in the length of the cephalic 

 femora, non-clavate, seventeen-jointed. Prothorax with the dorsum 

 narrowing to a premedian point of least width; cephalic margin 

 gently arcuato-emarginate, caudal margin subtruncate. Mesothorax 

 very slightly exceeding the median femora in length, with an extremely 

 faint median, and intimations of lateral, carinae. Metathorax falling 

 short of the mesothoracic length by nearly that of the prothorax, 



Fig. 7. — Leptynia senex n. sp. Ventral outline of apex of 

 abdomen ( $ ). (X 6.) 



carinse as on the mesothorax; median segment strongly transverse 

 poorly delimited cephalad. Abdomen becoming progressively quinque- 

 carinate caudad; segments, except proximal and distal ones, decidedly 

 longitudinal; anal segment very slightly longer than the preceding 

 abdominal segment, tectate dorsad, median carina sharp, caudal 

 margin produced and moderately V-emarginate mesad, exposing the 

 extreme apex of the supra-anal plate; cerci slightly more than half 

 the greatest length of the anal segment, compressed, subequal, 

 ventral margin straight, dorsal margin arcuate distad, the apex being 

 ventrad, lateral face excavate and meclio-carinate; operculum lanceo- 

 late, reaching to the middle of the anal segment, non-carinate mesad, 

 but with distinct sinuate lateral carinse in the proximal two-thirds; 

 seventh ventral abdominal segment with prominent, paired, parallel 

 median carinae, distal margin rectangulate. Cephalic femora dis- 

 tinctly exceeding the head, pro- and mesothorax in length; tibiae 

 slightly longer than the femora. Median femora slightly shorter 

 than the mesothorax, at the proximal third with a low rounded or 

 biundulate lobe on each ventral margin, carinae unarmed ; tibiae sub- 

 equal to the femora. Caudal femora equal to the length of the pro- 

 and mesothorax, unarmed and non-lobate; tibiae slightly exceeding 

 the femoral length. 



General color clove-brown, the thoracic tubercles, scattered spots 

 on the dorsum of the head and abdomen and clouding of apex of latter 

 hoary white. Limbs finely grizzled with whitish, the vicinity of the 

 cephalic flexure of the cephalic femora dull ochraceous. 



