NO. 1910. 



NOTES ON AFRICAN ORTHOPTERA—REHN. 



473 



same; from specifica in the lobes of the anal segment being produced 

 rectangulate, in the caudal point of insertion of the cerci and in the 

 distinctly incurved form of the same; from linen-alba in the peculiar 

 character of the apex of the cerci and the more" inflated subgenital 

 plate. 



Size rather large (for the genus); form very elongate, limbs exceed- 

 ingly slender. Head distinctly longer than the prothorax, some- 

 what narrowed caudad, with a very slight transverse inflation 

 between the eyes, medio-longitudinal sulcus slight; occipital margin 

 with a median pair of subconical tubercles; eyes subspherical, mod- 

 eratelj' prominent; antennae seventeen-jointed, in length slightly less 

 than half that of the cephalic femora. Prothorax with the lateral 

 margins slightly constricted ccphalad; 

 cephalic margin regularly arcuato- 

 emarginate, caudal margin truncate. 

 Mesothorax slightly more than six 

 times the length of the prothorax, 

 very delicately carinate in all but the 

 extreme caudal section, which is very 

 iinel}'" sulcate. Metathorax, including 

 the median segment, nearly equal to 

 the mesothorax in length, very deli- 

 cately carinate ; median segment quad- 

 rate but very slightly longitudinal, 

 cephalic margin very obtusely angu- 

 late, caudal margin arcuato-emargi- 

 nate. Abdomen wath the segments 

 longitudinal, all except the distal ones 

 very decidedly so, not distinctly cari- 

 nate except near the apex where sev- 

 eral lateral and a median carinas are 

 moderately marked; anal segment 

 compressed, subtectate, strongly carinate dorsad, distinctly' fissate 

 for some distance, from the side the caudal margin is truncate, 

 very slightly rounded dorsad, distinctly rectangulate i)roduced 

 ventrad, internally strongly denticulate, ventral line of anal seg- 

 ment subtruncate except for a slight arcuate emargination at the 

 cereal insertion, which is near the caudal extremity; cerci straight 

 (from side), subequal, slightly thickened and rounded distad, from 

 the dorsum they are seen to be distinctly bowed and slightly knobbed 

 at the apex; subgenital plate moderately inflated with the caudal 

 margin bisarcuate. Cephalic femora but slightly shorter than the 

 head and thoracic segments; cephalic tibia3 exceeding the femora 

 by the length of the head and pronotum. Median femora equal in 

 length to the head and ])ro- and mesothorax; median tibia^ some- 



FiGs. 13-15.— Gratidia pulchripes. Dob- 

 sal, LATERAL, AND VENTRAL OUTLINES OF 

 APEX OF ABDOMEN OF TYPE. (X 5.) 



