SOUTH AKklCAX TEH.MITES. 19 



The Wing Venation and Respiratory System of 

 Certain South African Termites. 



By 



Claude Fiillei-, 



Division of Entomology, Department of A«4Ticultnre. Pi-etoria. 



Witl. Plates III— XT. 



(Read at a Meeting of the S<Mith African Biological Society. Pretoria. 

 February \r>th. 1917.) 



Contents. 



Review ..... 

 I. Introbuction .... 



II. The ORiaiN of Wing-Venation 



III. The Nomenclature and Numberino of the Wing 



RIBS ..... 



IV. The Termite WiNr4 



V The Respiratory .System . 

 (a) The Body System 



(h) The Cephalic and Prothoi-acic System 

 (c) The Spiracles .... 

 {(I) Tracheal Growth and Modifications 

 ic) Tiie Homologies of the Main Stem 

 (./■) The Calotermite Stem . 

 VI. The Trachea of the Wing-sac. their Genesis and 

 Growth ..... 

 td) The Trachea- .... 

 (h) The Genesis of the Wing-sac Trachea^ 



(c) The Growth and Development of the Wing-sac 



Trachese .... 



(d) Reduction of Trachea? 



VII. The Venation and Unfolding of the Final Wing 

 VIII. The Variation in the Venation 



2* 



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