TABANID.E 



323 



Tyi^ of venation of the Tabanid^e. 



svi^i^'^?5>- 



Fig. 211. — Tahanus bromius. 



Longitudinal (or loiuj) veins. 



a Costa {or costal vein), 

 h Mediastinal {or auxiliary) vein, 

 c Subcostal {or \st lo7igitudi)ial) vein. 

 d Radial {or 2nd longitudinal) vein. 

 e Cubital {or 3rc? longitudinal) vein. 



/ Discal {or 4th longitudinal) vein. 



f^ Upper veinlet 1 



f ^ Second veinlet r from the discal cell. 



F Third veinlet J 

 q Postical {or bth longitudinal) vein. 



h Anal {or Gth longitudinal) vein. 

 i Axillary vein. 



k Preefurca = the common stem of the radial and cubital veins. 

 Ambient vein = the continuation of the costal vein round the hindmargin of the 

 wing. 



Cross (or transverse) veins. 



w Humeral cross-vein. 

 X Discal {or 7niddle) cross-vein. 

 y Lower {or small) cross-vein. 

 Anal cross-vein =g2= the lower branch of the postical vein. 



Cells. 



1 Costal {or mediastinal) cell. 



2 Subcostal cell. 



3 Marginal cell. 



4 Submarginal cell. 



4''' Second submarginal {or cubital) cell {or cubital fork-cell). 



