446 PROCEEDINGS OF THE ACADEMY OF [June, 



ate caiidad, caudal margin arcuate with a slight concavity dorsad of 

 the rounded obtuse ventro-caudal angle; transverse sulci three in 

 number, deeply impressed, the cephalic margin bordered caudad by an 

 incomplete sulcus, prozona more than twice the length of the metazona. 

 Exposed portion of the mesonotum very narrow ; metanotum and prox- 

 imal segment of the abdomen subequal in length, tectate, carinate, the 

 caudal section elevated. Tegmina equal to the metanotum in length. 

 Abdomen carinate dorsad, very distinctly compressed in the female; 

 supra-anal plate of the male with the lateral margins parallel in the 

 proximal half, distal half narrowed, apex broadly rounded, the lateral 

 portions bent dorsad from the mesal section ; cerci subequal to the fork, 

 except at extreme base, cephalic arm short but distinctly separated 

 from the longer caudal fork, tips narrowly rounded, the whole cercus 

 evenly curved mesad ; subgenital plate slightly shorter than proximal 

 width, the margin arcuate with a very slight truncate apical process. 

 Prosternal spine erect, acute, slightly antrorse distinctly flattened. 



Fig. 38. Fig. 39. 



Rhachicreagra nothra n. gen. and sp. Types. Fig. 38. — Dorsal view of female 

 pronotum. Fig. 39. — Dorsal view of apex of male abdomen. 



transversely in the female. Interspace between the mesosternal lobes 

 very slightly longer than broad in the male and with the angles rec- 

 tangulate, in the female slightly broader than long and with the angles 

 as in the male; interspace between, th« metasternal lobes very broadly 

 cunieform and narrower than the interspace between the mesosternal 

 lobes in the male, in the female broader cephalad than the interspace 

 between the mesosternal lobes, strongly narrowed caudad, the angles 

 acute. Cephalic and median femora inflated in the male, the cephalic 

 slightly longer than the pronotum, median slightly larger, tibiiK equal 

 to the femora in length; tarsi two-thirds the length of the tibiae, the 

 distal joint almost twice the length of the proximal and median joints. 

 Cephalic and median femora of the female not strongly inflated, the 

 cephalic no longer than the pronotum, otherwise the cephalic and me- 

 dian limbs are as in the male. Caudal femora about three-fourths 

 (male) to two-thirds (female) the length of the body, graceful, greatest 

 width contained about four times in the length of the femur, dorsal 

 margin sparsely serrate, pattern of the pagina distinct, pregenicular 



