310 Annals of the South African Museum. 



pterostigma oblong, angles moderately acute ; light reddish brown to 

 full red. 



$ . Dorsal surface of head light ochreous, turning posteriorly to 

 duller, olivaceous shades ; black markings similar to male, but still 

 more reduced. Posterior lobe of prothorax rather broad, erect ; styles 

 comparatively short and broad, not quite bent down to the dorsal 

 surface. Thorax light ochreous, turning to still lighter shades later- 

 ally and ventrally ; black markings as in male, but considerably 

 narrower throughout. Legs light reddish ochreous ; femora narrowly 

 and incompletely edged with black on lateral surface. Abdomen com- 

 paratively robust, dull ochreous ; black markings much reduced. 

 Segments 2-6 with a very narrow, partially interrupted mid-dorsal 

 line and a small round spot near posterior end ; 7 complete mid- 

 dorsal band, broader, enlarged near the posterior end ; 8 dorsal spot 

 at base, finally united to a narrow terminal ring ; 9 complete dorsal 

 band ; on the tenth two basal dots. Pterostigma light greyish 

 ochreous. 



$ , AM, 30, lidw. 19 mm. 9 , 28, 21. 



We have examined examples of this species from regions as far 

 remote as Abyssinia and Egypt and found those specimens to agree 

 perfectly with the South African series. 



P. acaciae and the two species following appear closely allied, 

 though almost certainly distinct. They have in common the red 

 colour dominant on head and at least partially on thorax, and in the 

 male the comparatively short superior appendages of very simple 

 structure. 



PSEUDAGRION MASSAICUM (Sj6stedt, 1909). 



S. Afr. Mus. : 2 (J, 1 9 , M'Fongosi, Zululand (v, x . 1911, W. E. 

 Jones). Mus. Brussels, de Selys' Coll.: 1 <$ , Port Natal (very old 

 specimen). Mus. Stockholm: 1 $, Caffraria (J. Wahlberg) ; 1 J , 

 Kibonoto, Kilimandjaro (Sjostedt). 



$ . Occiput reddish ochreous in lateral and ventral, black in 

 medial and dorsal half (black reduced to a spot at foramen in 

 specimens from M'Fongosi). Labium reddish ochreous. Dorsal 

 surface of head brick red, marked black (the red colour slightly 

 darker than in P. acaciae) ; small dots at base of labrum and 

 postclypeus ; narrow transverse line in front of anterior ocellus ; 

 complete, comparatively broad transverse band across posterior ocelli, 

 this band continued to a complete, rather broad outline of the large 

 postocular spots ; these spots united by a line at the occipital margin. 

 Prothorax black, sides and three small dorsal spots i-eddish. Thorax 



