Plate LX 

 Nymplial and Adult Structures 



Fis- 27. Isclinura verUcalis, adult, ventral aspect of pro- 



thoi'ax. 

 Fig. 28. The same, adult, maxilla. 

 Fig. 29. Ilelacrina nmericdna. adult, viiilial as]iect of jiro- 



thorax. 

 Fig. 30. Tschnura vertictilis. adult, caudal as])cct of head. 

 Fig. 31. Plcco])t('ra iiyHi]di. uiaxilla. 



Fig. 32. IsclinHra vcrlicalis. adult, ccplialic asiieet of head. 

 Fig. 33. Heiaerina americdua, adult, vcuti'al view of the 



second abdominal segment of the nude 

 Fig. 34. The same, adult, anal appendages, dorsal view. 

 Fig. 35. I.icJinura vertiadis, adult, leg. 

 Fig. 30. The same, adult, lateial view of ])i'othorax. 

 Fig. 37. The same, adult, labium. 

 Fig. 38. Ifcfficrina amcriraud, adult, latei'al view of auaJ 



appendages. 

 Fig. 39. The same, adult, lateral view of prothoi'ax. 



