XIV] CLASSIFICATION 273 



Tribe 8. Trameini (fig. 136, also PI. I, fig. 3). 

 Sectors of arculus either separate or only slightly united in forewing. 

 Arc. between Ax l and Ax 2 . Anal field of hindwing exceedingly wide, mostly 

 with numerous cells arranged in numerous rows transversely to the wing-axis. 

 Anal loop long, with well-formed toe, and complete mid-rib bent at an obtuse 

 angle. Often A. z gives off at its basal third a sector separating off the narrow- 



Fig. 136. Wings of Tramea loewii Br., $, Queensland. 

 (Hw. 37 mm.) Original. 



celled proximal anal field from a portion containing larger cells, between it 

 and the loop. Last Ax of forewing incomplete except in the last four genera. 

 Lobe of prothorax small. Larva somewhat Eucorduline in appearance, with 

 oval body, longish legs and huge head, the eyes exceedingly prominent, the 

 mask immense (figs. 29 E, F ; 36 H). 



Suborder ZYGOPTERA. 



Fore and hindwings closely similar in form, with narrow or petiolate 

 bases. Radius unbranched. An extra branch of the media (the Zygopterid 

 sector Ms) takes the place of Rs in the Anisoptera. No bridge or oblique 

 vein (except in Leslidae). Discoidal cell in the form of a simple quadrilateral, 

 crossed or free. Wings in repose folded back vertically above abdomen 

 (a few exceptions). Eyes button-shaped, projecting laterally at sides of head, 

 separated by a space greater than their dorsal diameter (except Epiophlebia). 

 Labium with middle lobe deeply cleft. Male with four anal appendages, 

 two superior and two inferior. Penis not distinctly jointed. Female with 

 superior appendages only. Ovipositor complete. 



Larvae cercobranchiate, with three caudal gills projecting from end of 

 abdomen, one medio-dorsal, the other two latero- ventral; the rectum also 

 used for breathing, but not possessing true tracheal gills as in the Anisoptera. 

 Lateral abdominal gills very rarely present. Abdomen slender, often elongated. 

 Gizzard with eight to sixteen radially symmetrical fields. 



T D.-F. 18 



