xvi Table of Contents 



CHAPTER XVI PAGE 



The Wings of the Homoptera 269 



(a) The more general features of the wings of the Homoptera 269 



(b) The wings of a cicada 271 



(c) The wings of the Membracida 274 



(d) The wings of the Jassidas 280 



(e) The wings of the PsyUid£e 283 



(/) The wings of the Aphidae 285 



(g) The wings of the Aleurodidse 289 



(h) The wings of the Coccidae 290 



(i) Supplemental Note 291 



CHAPTER XVn 



The Wings of the Heteroptera 292 



(a) The more general features of the wings of the Heteroptera 292 



(b) The tracheation of the wings of the Heteroptera 292 



(c) The veins and furrows of an adult wing 294 



CHAPTER XVni 



The Wings of the Dermaptera 295 



CHAPTER XIX 



The Wings of the Coleoptera 297 



CHAPTER XX 



The Wings of the Strepsiptera ' 301 



CHAPTER XXI 

 The Wings of the Mecoptera 



(a) The more general features of the wings of the Mecoptera 302 



(b) The venation of the wings of the typical Mecoptera 302 



(c) The aberrant Mecoptera 303 



CHAPTER XXII 

 The Wings of the Trichoptera 



suborder phryganeina , 307 



(a) The more general features of the wings of the Phryganeina 307 



(b) The tracheation of the wings of the Phryganeina 308 



(c) The phryganeid type of wing- venation 308 



(d) The more general features in the specialization of the wings of the 



Phryganeina 311 



(e) The methods of uniting the two wings of each side 312 



SURORDER MICROPTERYGINA 313 



(a) The venation of the wings of the Microptcrygina 314 



(6) The tracheation of the wings of the Microptcrygina 315 



(c) The zoological position of the Microptcrygina 317 



