130 



THE WINGS OF ORTHOPTERA 



nymph (Fig. 121) it is reduced to a nearly simple condition; in the hind 

 wings of Conocephalus (Fig. 122) and in the hind wings of Scudderia (Fig. 



Fig. 124. — Wings of a female nymph of Oecanthus (After C. & N 



123) it is typical in form; in other cases accessory tracheae have been 

 developed upon trachea Cui. 



The anal trachea. — Trachea ist A is always unb ranched; it often 

 coalesces at the base with the cubital trachea. The second and third anal 

 tracheae are represented by a single stout stem, which is slightly branched 

 in the fore wings, but which bears many branches in the hind wings ; this 



Fig. 125. — Fore wing of a male nymph of Oecanthus (After C. & N.). 



condition is correlated with the reduction of the anal area of the fore wings 

 and the greatly expanded anal area of the hind wings. 



