20 



Cyrtophtllus concavus. Harris. 

 Broad-ivinged Katydid. (Fig. 10.) 



Length about one inch and a half 

 to the end of closed wing covers ; 

 body, one inch. Color of body, 

 pale green, M'ings and wing covers 

 somewhat darker green. The 

 wing covers curve around the body 

 so that their edges touch above 

 and beneath, enclosing the body. 

 Wing covers with a prominent vein 

 running through the middle, and 

 on each side of this the veins form 

 a network, so that the wing cover 

 strongly resembles a leaf. 



Their eggs are of a dark slate- 

 color, about one-eighth of an inch 

 in length, and one third as wide. 

 They are laid in two rows along a 

 twig, the eggs overlapping each other a little. They hatch the 

 next spring, and the young feed on the tender leaves of almost 

 any plant. 



These insects have never been reported as injurious, but, where 

 abundant, their noise may become an intolerable nuisance. I 

 cannot imagine what ingenious person first discovered that their 

 song resembled the words " katy did," instead of some other 

 words ; for many persons besides myself fail, upon hearing them 

 for the first time, to recognize them by their sound. 



Fig 10. 

 Cyrtophyllus concavus. 



Genus Amblycorypiia. Stal (1873). 



Vertex smooth, without spines or projections of any kind, but 

 with a slight groove along the middle, between the antennas ; eyes 

 elliptical ; pronotum rounded behind, narrower in front. Proster- 

 num without spines. Fore coxoe with a spine on the outside. 

 Wing covers as long or but little longer than the hind femora. 

 Hind tibiae with a row of spines on each edge behind, and a row, 

 more remote, on the opposite side. Wings longer than the wing 

 covers. 



The species may be separated as follows : — 



/ "Wing covers extending beyond tlie end of the hind femora, ohlongifolia. 

 \ Wing covers reaching only to the end of the hind femora . rotundifolia. 



