358 Annals of the South African Museum. 



3. Cells between Rs and M 3 not distinctly arranged in rows. End of Jl/.> slightly 



and gradually convex towards the costa. (Plate VIII, fig. 8) . Acschna. 

 Cells between Rs and M 3 , in part at least, distinctly arranged in trans- 

 verse rows, especially a regular supplementary sector in front of and 

 parallel to M^, distant by one row of cells. M. 2 convex towards the costa 

 in a rather abrupt curve in level of distal end of pterostignia. (Plate VIII, 

 fig. 9) .......... Anaciaeschna. 



4. Cn 2 in hind wing following the general direction of Gu^ throughout, in distal 



half running to wing's edge parallel to Cu, and distant by one row of 

 cells. A supplementary lateral keel on part of the abdominal segments, 

 at least 7-9 ........... Anax. 



Cit 2 in hind wing circumscribing with base of Ci^ a roughly quadrangular 

 or circular field with three to four rows of cells, where it approaches Cui 

 to run into parallel direction, but distinct recurrent branch (Plate V, 

 fig. 1). No lateral keels on abdomen ..... Hemianax. 



GrYNACANTHA (Ram bur, 1842). 



A genus of circumtropical distribution. Some isolated species 

 penetrate into higher latitudes in various regions. The two species here 

 recorded are evidently outposts of tropical character and cannot be 

 expected much farther south than the present records. Collectors' notes 

 from far distant regions (Malayia and South America) mention cre- 

 puscular habits for at least part of the species, and from their colour 

 system and perhaps also general stature one would deduce that the 

 entire group consists of wood-loving insects. The facies of Gynacantha 

 is quite peculiar much more so than can be said in a few words and 

 an expert will scarcely ever fail to locate even a male (without the more 

 characteristic female) at the first glance. 



Comparatively large species : J abd., 56 + 6'5, hdw. 52, pt. -4 mm.; ? , 55 

 + 5, 55, 4'5. More than 25 ante-cubital cross-veins in front wing. Supe- 

 rior appendages of male excised at internal margin, broadly cut at end. 



G. rillosa. 



Much smaller species : $ abd., 43 + 5, hdu\ 36, pt. 25 mm. ; $ , 47 + 3, 39, 

 < 3. About 15 ante-ciibital cross-veins in front wing. Superior appen- 

 dages of male not excised at internal margin, pointed . G. manderica. 



GrYNACANTHA VILLOSA (GrUllberg, 1902). 



Coll. Ris : 1 (J, 1 ? , Delagoa Bay (Junod). 



This pair was identified in the Schultze paper as G. 5is/>//m, Rainb., 

 from descriptions alone. I have examined since the types and other 

 specimens of bispina, which is certainly distinct, whereas the description 

 of inllosa agrees perfectly. 



d (adult, preservation of colours somewhat poor). Labium and 



