\ 



THE WINGS OF HETEROPTERA 



293 



any other order. But an examination of the tracheation of the wings of 

 nymphs of bugs shows that these wings are merely modifications of the 

 primitive type. 



Fig. 302. — Tracheation of a fore wing of a pentatomid nymph 

 (After C. & N.). 



A quite extended study of the development of wings of the Heteroptera 

 was made by Comstock and Needham; and as I have no additional data 

 that tend to modify our conclusions I will abstract our account of the 

 results of this investigation.* 



In our studies of Heter- 

 optera we examined n^Tnphs 

 of the following families: 

 Notonectidse, Nepidae, Belo- 

 stomidae, Reduviidae, Nabi- 

 d^e, Capsidse, and Pentato- 

 midae. Of these there is 

 no doubt that the most 

 generalized condition of 

 wing-venation is found in 

 the family last named, but 

 further studies in other fami- 

 lies may reveal a still more 

 primitive type. 



Fig. 303. — Tracheation of a hind wing of a 

 pentatomid nymph (After C. & N.). 



The tracheation of the fore wing of a pentatomid nymph is represented 

 by Figtire 302, and that of the hind wing by Figure 303. In the fore wing 

 trachea C is well-preserved. Tracheae Sc and R are closel}^ approximate in 

 the basal half of the wing, foreshowing the coalescence of subcosta and 

 radius. In the distal half of the wing trachea Sc traverses that part of the 



*Handlirsch ('o6-'o8) figures the tracheation of the wings of Lygceiis (Lygaeidae), 

 Syromastes (Coreidae), and Nepa (Nepidaj). 



