INSECUTOR INSCITI^ MENSTRUUS 47 



slender ; anterior femora nearly twice as long as the pro- 

 notum and, like also the middle ones, unarmed above and armed 

 below on the cephalic margin only v/ith three or four stout 

 spmes ; hind femora about three times as long as the prono- 

 tum, moderately swollen in the basal three-fourths, unarmed 

 above and armed beneath on the apical three- fourths on the 

 cephalic margin with seven or eight stout spines, those toward 

 the apex larger and apically bent moderately backward ; all gen- 

 iculations distinctly spined except the cephalic ones of the inter- 

 mediate femora, which are rounded. Organs of flight fully de- 

 veloped ; tegmina narrow with the margins about parallel, over 

 four times as long as broad, apically very roundly subtruncate 

 posteriorly ; speculi small, membraneous on the right tegmen 

 and coriaceous on the left, the stridulating vein moderately thick, 

 forming a very distinct rounded projection beyond the inner 

 margin of the tegmen ; wings broad and lightly fuliginous, the 

 veins yellowish and the crossveins dark. Abdomen long and 

 slightly compressed, the last dorsal segment broad and apically 

 broadly concave ; supraanal plate very roundly triangular, 

 strongly declivate, sulcate dorsally ; subgenital plate very elon- 

 gate, longer than the pronotum, apically forming a mesially 

 constricted shaft with the apex deeply divided, each branch a 

 long sinuate flattened filament as long as the plate itself ; these 

 filaments, or flagellate processes, are evidently modified anal 

 styles but they are not distinctly articulated, appearing to be 

 prolongations of the apical forks of the subgenital plate and 

 differentiated from the rest only by a darker color, as shown in 

 Plate II, figure 17 ; cerci about five times as long as broad, 

 cylindrical, gently tapered to a broadly rounded apex, curved 

 moderately inward apically and furnished with a small chiti- 

 nized subapical tooth, or tubercle, in the inner side. 



Color uniformly yellowish brown with the last abdominal 

 segment wholly piceous ; the spines of the legs are blackish 

 apically and those of the femora and of the ventral side of the 

 hind tibije are blackish on the side toward the base of the leg ; 

 many of the crossveins of the tegmina are narrowly margined 

 with black. 



