600 



PROCEEDINdS OF THE XA TIOXAL MUSEUM. 



caudal margin truncato-arcuate; prozona about twice the length of 

 the metazona, the cephalic and caudal transverse sulci distinctly 

 and tlio median slightly impressed, metazona with at least the caudal 

 half impresso-punctate; lateral lobes longer than deep, the ventral 

 Hjargin slightly sinuate, caudal margin rounded with the sinus slightly 

 U)arked. a slight but apparent shoulder developed on the metazona. 

 Prosternum with a pair of elongate slender spines. Tegmina exceed- 

 ing tlie bod}' and about reaching the tips of the caudal femora, suit- 

 lanceolate with the apex rounded, the greatest width being contained 

 ahout four and a half times in the lengih: cephalic margin veiv 

 slightly arcuate, the caudal mai'gin straight; mediastine and ante- 

 rior radial veins with nuuK^-ous oblicjue rather regular branches 

 extending to the cephalic margin; ulnar veins extending parallel to 

 the caudal maroiii; \eins of the marginal field and the network of t!.e 



Fig. 1. — ISCHNCMEI.A PrUHRlPENNIS. LATERAL VIEW (iK TYl'K. (Xlj.) 



tamhourine of the right tegmen coriaceous, ^^'ings slightly longer 

 than the greater width, the margin regularly i-ounded. Terniinal 

 abdominal segment with a median truncate emargination; supra-anal 

 plate produced, trigonal, longitudinally d(>i)ressi'd mesad; cerci straight, 

 except for an apical internal deflection, which is depressed into a 

 lamellate ridge on the internal side and supplied with three distinct 

 teeth; suhgenital plate produced, carinate ventrad, the apical margin 

 with a very deep median V-shaped emargination, st3'les slightly longer 

 than the depth of the median emargination. Cephalic fcMuora half 

 again as long as the pronotum, very slightly larger distad than prox- 

 imad; cephalic tibiie about ecpial to the femora in length, moderately 

 inflated at the slits of the bulhv. Median femoia slightly longer than 

 the cephalic, subeiiual in circumference except for the slightly con- 



