18 



BULLETIN 256, U. S. DEPARTMENT OF AGRICULTURE. 



Color about as in preceding instar; body more strongly arched. 

 Wing-pads more distinctly veined, their tips directed backward over 

 the abdomen, reaching to middle of second segment. 



Fig. 15. — The angular-winged katydid: Fifth-instar nymph. Two and one-half times natural size. 



(Original.) 



Sixth instar (fig. 16). — Measurements: Length of body, 17 mm.; 

 length of head, 5.7 mm.; length of pronotum, 5 mm.; posterior 

 femur, 16.5 mm.; posterior tibia, 17.7 mm.; antenna, 37.4 mm. 

 Body strongly arched above, sloping about equally abruptly in both 



Fig. 16.— The angular-winged katydid: Sixth-instar nymph. Almost three times natural size. (Original.) 



directions from second abdominal segment; wings projecting upward 

 and backward at an angle from abdomen; tips considerably elevated 

 above latter. 



Nymphal instars each described from a single specimen shortly after 

 molting. 



