1911.] NATURAL SCIENCES OF PHILADELPHIA. 331 



teen-jointed. Prothorax with the lateral pronotal margins sub-parallel, 

 slightly in-bent cephalad and caudad, cephalic margin of pronotum 

 subarcuate emarginate, caudal margin of same subtruncate, transverse 

 sulcus di.stinctly impressed mesad. Mesothorax three-fourths the 

 length of the median femora, supplied with a fine medio-longitudinal 

 cannula. Metathorax slightly shorter than the mesothorax, with a 

 similar extremely weak cannula; median segment subquadrate. 

 Abdomen of moderate length, the segments longitudinal, but not 

 excessively prolonged, toward apex of the abdomen lateral and median 

 carinulae are faintly indicated ; anal segment fornicate, produced meso- 

 caudad, the projection being not a half the length of the segment 

 itself, dorsal surface with a distinct medio-longitudinal carina more 

 distinct on the process, lateral margins regularly converging from the 

 cereal bases caudad, the apex of the process shallowly V-emarginate ; 

 cerci inserted at the middle of the segment proper, narrowest in the 

 premedian section, distal extremity enlarged, subclavate and trigonal 

 in section, immediate apex bluntly acute, when viewed from the dorsum 

 the cerci are seen to be strongly arcuate in the proximal half; sub- 

 genital plate hardly inflated, reaching to the base of the anal segment, 

 distal margin arcuate with a pair of small, short, rotundate median 

 lobes, a weak medio-longitudinal carina present on distal half of plate. 

 Cephalic femora almost equal to the 

 head and thoracic segments in length; 

 cephalic tibiae exceeding the femoral 

 length by about the length of the head. Fig . 5 _ G ra tidia nebulosipes 



Median femora not exceeding the pro- n.sp. Lateral outline of apex 



,, . . ,, to *. of abdomen (d 1 ). (X 6.) 



and mesothorax- in length; median 



tibiae slightly exceeding the femora. Caudal femora equal to two- 

 thirds the length of the cephalic femora; caudal tibiae exceeding the 

 femora by slightly less than the length of the head. 



General color Prout's brown, becoming bistre towards the apex of 

 the abdomen, the latter region sparingly marked with hoary white. 

 Head and prothorax with the base color near wood-brown, indistinct 

 postocular bars of the general color present; antennae drab. Limbs 

 clouded and varied with the general color, tawny-olive and soiled buff. 



Measurements. 



Length of body, 46 . mm. 



Length of prothorax, 2.2 " 



Length of mesothorax, 9.0 " 



Length of metathorax, 8.2 " 



Length of cephalic femur, . . 21.0 " 



Length of median femur, 10.8 " 



Length of caudal femur, 14 . 5 



