i38 
diptp:ra 
Fig. 22. Dorsal aspect of head of Exechia. 
— 23. Wead oi Lygistoyrhina {a.iier Sknse). 
— 24. Frontal aspect oi Leia (= Neoglaphyyoptera Osten-Sacken). 
Plate 2 
Explanation of abbreviations. — C = Costa ; Scr and Sc2 = anterior and posterior branches of the subcosta 
Ri, R2+3, and R4+5 = branches of the radius ; Rs = radial sector = R2-I-J ~\- R4+5 ; Mi-(-2 and Mi = branches of th 
media; Cui and Cua = branches of the cubitus; A = anal veins; R-M = radio-medial crossvein; M-Cu = medio 
cubital crossvein. 
Fig. I. Diagram of the most generalized type oi Mycetophilid wing (Palaeoplaiyura). 
— 2. — — DHoinyia wing. 
— 3. — — Sciophilinae wing. 
— 4. — — Mycelopliilinae wing. 
Plate 3 
Fig. I. Bolitophila. 
— 2. Hesperinus (after Van der Wulp). 
— 3. Mycctophaetus (after Scudder). 
— 4. PacJiyneura (after Van der Wulp). 
— 5. Thiras, fossil (after VVestwood). 
— 6. Mycdobia. 
— 7. Palaeoplaiyura (recent and fossil). 
— 8. Di torn via. 
— g. Symmeriis (= Plesiastiiia) . 
— 10. Diadocidia (after Winnertz). 
— II. Aydoneura {= Cyrtoneiiia, after Marshall). 
— 12. Atidriadophila (aiter Skuse). 
— 1 3. Heteropterna (after Skuse). 
— 14. Ceroplahis. 
— i5. Platyura. 
— 16. Platyura. 
— 17. Apemon nov. gen. 
— 18. Pseiidoplatyura (after Skuse). 
— ■ ig. Hesperodes (diagrammatic). 
— 20. Macrocera. 
— 21. Nervijuncta (after Marshall). 
— 22. Casa (= Hnttonia, after Marshall). 
— 23. Monoclona. 
— 24. Parvicellula (after Marshall). 
— 25. T dragoneitra [aher Wmneriz). 
— 26. J etragoneiira (after Winnertz). 
— 27. Hadroneura (after Lundstrom). 
