W. G. IHETZ 363 



EXPLANATION OF PLATES 

 PLATE XIII 



To avoid needless repetition the following abbreviations attached to the 

 figures are the same for all: VIII. t — Eighth abdominal tergite; VIII. s — 

 Eighth abdominal sternite; IX. t — Ninth tergite; IX. s — Ninth sternite; 

 A — Upper or first apical appendage; B — Middle or second apical appendage; 

 C — Lower or third apical appendage; Lat. ap. — Lateral ap endage; up. pr. 

 — Upper or first process; m. pr. — Middle or second process; 1. pr. — Lower 

 or third process; bl. pr. — bladelike process. 



Fig. 1. — Tipula hebes Loew. Lateral view of hypopygium. 



Fig. 2. — Tipula ottawaensis spec. n. Lateral view of hypopygium. 



Fig. 3. — Tipula ottawaensis spec. n. Posterior view of hypopygium. 



Fig. 4. — Tipula ottawaensis spec. n. Apical appendages, lateral ap- 

 pendage and processes and bladelike process, seen from within. 



Fig. 5. — Tipula suspecta spec. n. Apical appendages, lateral ap- 

 pendage and processes, seen from without. 



Fig. 6. — Tipula suspecta spec. n. Bladelike process. 



Fig. 7. — Tipula doanei spec. n. Bladelike process. 



Fig. 8.- — Tipula doanei spec. n. Apical appendages and lateral ap- 

 pendage and processes, seen from without. 



Fig. 9. — Tipula ingrata spec. n. Apical appendages seen from without. 



Fig. 10. — Tipula ingrata spec. n. Lateral appendage and processes, 

 seen from without. 



Fig. 11. — Tipula ingrata spec. n. Bladelike process. 



Fig. 12. — Tipula clathrata spec. n. Lateral appendage with processes, 

 seen from without. 



Fig. 13. — Tipula clathrata spec. n. Bladelike process. 



Fig. 14. — Tipula derelicta spec. n. Apical appendages, lateral ap- 

 pendage and processes and bladelike process. 



Fig. 15. — Tipula derelicta spec. n. Lateral view of hypopygium. 



Fig. 16. — Tipula criddlei spec. n. Bladelike process. 



Fig. 17. — Tipula criddlei spec. n. Apical appendages and lateral ap- 

 pendage with processes, seen from without. 



PLATE XIV 



Fig. 1. — Tipula ottawaensis spec. n. Wing of male. 



Fig. 2. — Tipula suspecta spec. n. Wing of male. 



Fig. 3. — Tipula doanei spec. n. Wing of male. 



Fig. 4. — Tipula ingrata spec. n. Wing of male. 



Fig. 5. — Tipula clathrata spec. n. Wing of male. 



Fig. 6. — Tipula derelicta spec. n. Wing of male. 



Fig. 7. — Tipula criddlei spec. n. Wing of male. 



TRANS. AM. ENT. SOC, XL. 



