626 Annals of the South African Museum. 



and attaches to it liocnemis, Em., as a variety. Quite recently Dr. 

 Santschi has removed the latter from atramentarius and placed it 

 with race radamoides, Forel, (see Ann. Soc. Ent. France, vol. 85, 

 p. 203, 1917), at the same time expressing the opinion that atramen- 

 tarius is more nearly allied to var.. Mathildae, Forel of race negus, 

 Forel. The not infrequent changes, similar to the foregoing, which 

 have heen made from time to time in respect to maculatus and its 

 numerous forms, serve to show how confused our knowledge of this 

 group still is, and also on what subtle distinctions many of the so- 

 called races and varieties have been so rashly erected. 



Race radamoides, Forel, var. diffusus, Santschi. 



Grandidier, Hist. Madagasc, vol. 20, p. 213, 1891. 

 (variety). Ann. Soc. Ent. France, vol. 85, p. 293, %$. 1917. 



"^ major, 13-13 - 6 mm. Larger than the var. madecassa Emery. 

 The head of a reddish brown, has the posterior angles less reddish 

 brown, the vertex more or less blackish. The yellow markings on 

 the abdomen are as extensive as the black ones, their limits generally 

 diffuse. With the exception of a dorsal triangular spot, the 1st 

 segment in entirely yellow. Tibiae not, or only slightly brownish. 

 Length of posterior tibiae, 3-6-3'9 mm. 



^ minor, 8 mm. Yellow, a longitudinal band on the dorsum of 

 the abdomen which becomes less distinct as the size of the insect 

 decreases. Matopo Hills, S. Rhodesia, (Arnold), types: Natal, (Muralt 

 and Traegaorth). The Natal specimens are smaller and pass into 

 the var. liocnemis." 



In the same paper, Dr. Santschi records the var. madecassa Emery 

 (R. C. Acad. Bologna, p. 30, 1904) from Natal. It dffers from 

 liocnemis in having the head black instead of brown and the spots 

 on the abdomen more distinct. 



Race lacteipennis, Smith, 

 Cat. Hymen. D. M. VI, p. 34, & $, tf. 1858. 



%. This form differs from the type of the species in having the 

 head less convex-sided and longer, one-seventh longer than wide. 

 The dorsal profde of the thorax is also less convex and the scale 

 of the petiole thicker, with the anterior face more convex. The 

 thorax is darker, and the abdomen black or blackish brown above, 

 with only the apical margins of the segments and the base of the 

 1st pale testaceous. Legs dark ochreous, only the tarsi brownish. 



