THE CANADIAN ENTOMOLOGIST 225 



Fig. 15. Phylocentropus sp.; claw of 1st leg. 



Fig. 16. Phylocentropus sp.; labium a^id maxilhi^; a, labial 

 lobe; b, max. lobe; c, max. palpus. 



Fig. 17. Plectrocnemia conspersa Curt.; labium and maxilla 

 (after Ulmer) ; a, labial lobe; b, max. lobe; c, max. palpus. 



Fig. 18. Psychomyia ptisiUa Fabr.; labium and maxilla (after 

 Ulmer); a, labial lobe; b, max. lobe; c, max. palpus. 



PLATE VII. 



Fig. 19. Ganonema americanum Walk.; dorsal view of labrum. 



Fig. 20. Chiloslii^ma sp.; dorsal view of labrum. 



Fig. 21. Psilotreta frontalis Banks; dorsal view of labrum. 



Fig. 22. Psilotreta frontalis Banks; dorsal view of metathorax 

 showing chitinous plates. 



Fig. 23. Leptocella uwaroimi Kol.; ventral view (jf head; a, 

 gula;" b, pleura; c, membrane. 



Fig. 24. Mystacides sepiilchralis Walk.; ventral view of head; 

 a, gula; b, pleura; c, membrane. 



Fig. 25. Goera pilosa Fabr.; ventral view of head; a, gula; b, 

 pleura; c, membrane. 



Fig. 26. Arctoecia medial is Banks; ventral view of head; a, 

 gula; b, pleura. 



Fig. 27. Molanna cinerea Hag.; first leg; a, coxa; b. trochanter; 

 c, femur; d. tibia; e, tarsus. 



Fig. 28. Molanna cinerea Hag.; femur of 3rd leg. 



Fig. 29. Molanna cinerea Hag.; claw of 3rd leg. 



Fig. 30. Berceodes minuta L; mandible (after lUmer). 



Fig. 31. Leptocella mvaroivii Kol.; third leg; a, coxa; b, tro- 

 chanter; c, apical piece of femur; d, distal piece of femur. 



Fig. 32. Leptocella uwarouii Kol.; first leg; a, coxa; b, tro- 

 chanter; c, femur; d, tibia; e, tarsus. 



Fig. 33. Phryganea sp.\ tracheal gill. 



Fig. 34. Platycentropus liostis Hag.; dorsal view of metathorax. 



Fig. 35. Arclcecia medialis Banks; anterior view of prothorax; 



a, prosternal horn; b, prosternum; c, pronotum; d, 1st leg. 



Fig. 36. Ga^ra pilosa Fabr.; thoracic armature; a, prothorax; 



b, mesothorax; c, metathorax; d, base of legs; e, supporting plates. 



Fig. 37. Brachycentrus nigrosoma Banks; thoracic armature; 

 a prothorax; b, mesothorax; c, metathorax; d, base of legs. 



