278 PROCEEDINGS OF THE ACADEMY OF [May, 



the length, external margin slightly arcuate, internal margin more 



decidedly arcuate, the external margin thick- 



^^-^7'''''^^"^ ened and projecting distad of the internal 



/ / \ \ margin at the apex as a minute point; apex of 



I aH \ Tm^ \ ^^^ tegmina slightly surpassing the margin of 



1 'I/- ^y'-XT* . ^Q mesonotum. No >vings present. Abdo- 



Jjr:r<iZ:tzi:>^x men slightly broader than the thoracic seg- 



IJh^- ^^'. "■',""" ' -"'^'^^ >4>\ ments; caudal margins of the segments with 



(// V".' ■ '.'.'.'.'.' '■ !tt^:t^ y low, regularly placed ridges, such as are found 



i V --•■'lU"'7j^ "t in other species of this genus; caudo-lateral 



^— ^ \ angles of the segments acutely produced; 



Fig. l.—Rhicnoda jor- supra-anal plate transverse, the length con- 



gensenin. sp. Dor- tained about twice in the greatest width, 



(Xl|.) the margin regularly arcuate with a shallow 



median rectangulate emargination ; cerci no 



more than half the length of the supra-anal plate, broad fusiform, 



depressed; subgenital plate broad, the general outline of the plate 



arcuate with a shallow emargination by each cercus. Cephalic 



femora with the ventro-cephalic margin with four median spines, 



the ventro-caudal margin with three spines on the distal half; 



median femora with five spines ventro-cephalad, one of which is 



apical, ventro-caudal margin with the same number, but with the 



spines more regularly placed; caudal femora with the ventro-cephalic 



margin with five spines similarly disposed to those on the same 



margin of the median femora, caudal margin with spines but one or 



none; caudal tarsi missing in the type specimen. 



General color above Vandyke brown, the tegmina and the lateral 

 portions of the metanotum prout's brown, the abdominal ridges 

 weakly lined with seal brown. Ventral surface chiefly tawny-olive, 

 the abdomen broadly but indefinitely bordered with seal brown, the 

 paler portions with numerous spots of the same color, these spots 

 being placed on very low and not very distinct tubercles, a narrow 

 medio-longitudinal line of seal brown indicated on the venter of the 

 abdomen. Head ventrad to below the eyes seal brown; eyes and 

 antennae clove brown. Limbs becoming burnt umber distad. 



Measurements. 



Length of body 22 . 5 mm. 



Length of pronotum 6 . 



Greatest width of pronotum 11 . " 



Length of tegmen 4 . " 



■Greatest width of abdomen 14 . " 



