The Odonaia or Dracjonflies of Souili Africa. 



•273 



fj (adult, colours in good eonditiou). Labium and Ofciput. whitish. 

 Labruni light yellowish brown with a greenish shade. Dorsum of 

 head otherwise dull brownish black and light reddish brown. Reddish _ 

 brown also are the base of the mandibles and genae, the anteclypeus, 

 and a narrow transverse line slightly concave anteriorly across the 

 base of the antennae and the anterior ocellus. Prothorax dull black. 

 Thoracic dorsum dull black with three about equally broad light 

 reddish-brown lines on the median and at the humeral sutures, the 

 latter ones not reaching quite to dorsal or ventral end of suture. Sides 

 dull black ; a rather broad metepisterual reddish band from the 

 nietastigma dorsal not quite to the dorsal end ; latei'o-veutral margin 

 of metepinieron very narrowly lined with reddish brown. Ventral side 



Fia. 10.— Les^es U'lMI.. 



S . Caffravi.a. 

 dorsal view. 



•Vlipendatjes, risht side and 



black ; a double triangular yellowish spot on the unpaired sclerite of 

 raetasternum. Some prninose blue points in the interalar space. Legs 

 very light yellowish brown ; narrow blackish lines on the external side 

 of femora and internal side of tiljiae; spines black. Abdomen dark 

 reddish brown dorsally, turning to very light yellowish brown ventrally, 

 marked with dark brown ; dorsum of segments 1 and 2, 3-G narrow 

 terminal rings and almost circular, anteriorly diffuse ante-terminal 

 spots ; 7 black with a lateral longitudinal reddish stripe on two-thirds 

 of length ; 8-10 wholly black. Appendages black ami yellow ; the 

 dorsal ridge, sub-basal tooth and tips of superior, basal portion of 

 inferior black. Inferior appendages very short, ending in a blunt, 

 slightly upturned knob (Text-tig. 10). Wings hyaline; venation 

 blackish ; pterostigma rectangular, narrow, proximal two-thirds dark 

 reddish brown, distal third turning gradually to light yellowish brown. 

 Ahd. 31, hdiv. 18,pf. Lmm. 



