ORTHOPTEEA OF INDIANA. 343 



intermission until the approach of day warns him that his feathered 

 enemies will soon be on the alert, and that silence will be, for a time, 

 the best policy to pursue. 



From the other Locustida, the katydids differ widely in their 

 habits of oviposition. The eggs are not deposited in the earth or in 

 twigs, but are usually glued fast in double rows to the outer surface 

 of slender twigs, or are inserted in the edges of leaves. The eggs of 

 the most common species appear like small flattened hemp seeds, 

 and usually overlap one another in the row in which they are placed. 

 On account of this method of oviposition, the ovipositors of the katy- 

 dids are broader, more curved, and more obtuse at the end than in 

 the other sub-families whose members oviposit in the earth, in rot- 

 ten wood or in stems of grass. This sub-family is represented in In- 

 diana, so far as known, by three genera, which may be separated by 

 the following table: 



KEY TO GENEBA OF INDIANA PHANEROPTERINiE. 



a. Wing covers of nearly equal breadth throughout; fastigium of ver- 

 tex no broader than the first antennal joint; supra-anal plate of 

 male with a long decurved spine which is notched at the end 



XLI. SCUDDERIA, p. 343 



aa. Wing covers widest in the middle; fastigium of vertex much broader 

 than the first antennal joint; supra-anal plate of male not as above, 

 b. Hind femora but little, if any, shorter than wing covers; ovi- 

 positor well developed, curved gradually upward. 



XLII. Amblycorypha, p. 350 



bb. Hind femora much shorter than wing covers; ovipositor very 



short, turned abruptly upward 



XLIII. MiCROCENTRUM, p. 353 



XLI. ScuDDERiA Stal (1873). 



This genus includes katydids of medium size, with wing covers 

 long, narrow, of nearly equal width throughout, and rounded at the 

 ends. The fastigium of vertex is acuminate, scarcely deflexed and 

 very narrow, while the vertex itself is compressed, and hollowed out 

 on either side for the better accommodation of the eyes, which are 

 nearly hemispherical. The fore and middle femora are unarmed 

 beneath, while the hind femora are long and slender, almost equal- 

 ing the length of the wing covers in some of the species. The ovi- 

 positor is short, broad, curved sharply upward, and has the apical 

 third finely crenate on both margins. The males are readily dis- 

 tinguished from those of the other genera by having both anal plates 



