332 Annals of the South African Museum. 



the middle, narrowed to about one-half at the sides ; narrow ferru- 

 ginous lines from posterior to anterior ocellus and from this to 

 anterior margin of black transverse Viand ; in front of anterior ocellus 

 a very narrow black transverse line, concave anteriorly. On thoracic 

 dorsum the median yellowish line broader, the black stripes narrower 

 than in liiale, about one-third of breadth of mesepisterna. Black 

 dorsal spot of segment 2 only slightly narrowed in front of the 

 terminal dilatation and running through to anterior end ; 3-6 mid- 

 dorsal band slightly broader, otherwise as in male ; 7 as in male ; 8 

 mid-dorsal black band on anterior two-thirds ; 9 two dorsal basal 

 black spots ; 10 entirely light coloured. Vulvar spine strong ; vulvae 

 level with the abdominal end. 



Pterostigma light greyish ochreous, larger than in male. Ma and 

 M^i in front wing at Pnq 6 + 2, 6 + 3 or 6+4, in hind wing 5 + 3 

 or 5 + 4. 



<J, AM, 28, hdw. 19 mm. 9 , 30, 21. 



ENALLAGMA SUBTILE, n. sp. 



Mus. Tervueren : 2^,5 9 Kapiri, Katanga (ix, x . 1912, Legros). 



J 1 . Occiput and labium whitish. Labrum light ferruginous, 



lined with whitish. Dorsal surface of head light ferruginous ; a black 



transverse baud across the ocelli, as broad as the ocellar region in the 



middle, narrowed laterally, and partially cut through by narrow oblique 



ferruginous lines from posterior ocellus to base of antennae. First 



and second joint of antennae ferruginous, the rest black. Prothorax 



light ferruginous dorsally, very light ochreous at the sides. Thoracic 



dorsum light ferruginous ; at each side of the ferruginous median 



suture a narrow black line, not broader than the ferruginous line on 



the suture. Extremely narrow black line on humeral suture and 



small black dot in its dorsal end. Sides and ventral side very light 



ferruginous, almost whitish, a very small black dot in dorsal end of 



second lateral suture. Legs whitish ochreous, spines alone blackish. 



Abdomen very slender. Segments 1-7 very light ochreous at the 

 sides ; dorsally blackish as a band of about one-third the segment's 

 breadth, narrowly interrupted at anterior end and slightly dilated 

 before posterior end of each segment ; dorsal band deeper black and 

 slightly broader on 7 ; 8-10 very light greyish blue, shading laterally 

 into whitish ochreous. Appendages very light ochreous, only the 

 extreme tip of the inferior obscure (Text-fig. 41). 



Venation very thin, partly greyish ochreous. Pterostigma thin, 

 very light ochreous. Me, and M^a at Pnq 5 4- 2 or 5 + 3 in front 

 wing, 4 + 3 or 4 + 4 in hind wing. 



