34 



ORTHORRHAPHA NEMATOCERA 



[CH. 



12 



n 



14 



13 



10 



17 



Fig. 10. Wing of Kelloggina, a blepharocerid, shewing the network of fine 

 vein-like creases ( X 12). 



Fig. n. Thorax of Tipula, with V-shaped transverse suture on scutum ( X 8). 



Fig. 12. Wing of Ryphus (Xi2). The costal vein does not extend beyond 

 the apex of the wing. 



Fig. 13. Wing of Cecidomyia (XI2). The costal vein extends completely 

 round the wing. 



Fig. 14. Antenna of Orphnephila (x8o). 



Fig. 15. Right hind-leg of Mycetophilus, shewing the tibial spurs (X8). 



Fig. 16. Head of Bibio (Xi2); oc, ocelli. 



Fig. 17. Wing of Chironomus sp. ( X 8). 



