250 PROF. M. BEZZI. 



(b) Acidia coloniarum, Speiser (Deut. Ent. Zeits., 1915, p. 102), from Camerun, 



Victoria, and also from East Africa, Ligitale. 



(c) Acidia scychellensis, Lamb (Trans. Linn. Soc. London, Zool., xvi, 1914, p. 316, 



fig. 10 and pi. 19, fig. 6), from the Seychelles. 



(d) Acidia (?) ocellata, Lamb (I.e., p. 317, fig. 11 and pi. 19, fig. 7, 8), from the 



Seychelles. 

 Trypeta guttatolimbata, Enderlein (Zool. Zahrb., xxxi, 1911, p. 429, fig. K), 

 probably belongs here, but has a very peculiar wing pattern, and requires the forma- 

 tion of a new genus ; it is described from Madagascar. 



XVI. Ocneros, 0. G. Costa, 1844. 

 The following three species, all described by Loew, seem to be referable to this 

 genus. They may be distinguished as follows : — 



1(2). Scutellum entirely yellow ; discoidal cell wholly infuscated, without hyaline 



spots ; stigma longer than the 2nd costal cell . . . . sinuatus, Loew. 



2(1). Scutellum broadly black in the middle ; discoidal cell with hyaline spots ; 



stigma shorter than the 2nd costal cell. 

 3(4). The hyaline indentation at fore border behind the stigma ends before reaching 

 the 2nd longitudinal vein ; the two last abdominal segments of the female 

 have at hind border a broad, yellow, transverse band . . mundus, Loew. 

 4(3). The above-named indentation extends into the 1st posterior cell and ends at 

 the 4th longitudinal vein, near the upper end of the posterior cross-vein ; 

 the last two abdominal segments of the female are entirely black 



excellens, Loew. 



1. Ocneros sinuatus, Loew, Berl. Ent. Zeits., v, 1861, p. 263, pi. ii, fig. 4. 



Easily distinguished by the black wing pattern being more extended than in the 

 other species ; the band over the hind cross- vein however does not reach the hind 

 border of the wing. 



Described from CafTraria, and not found subsequently. 



2. Ocneros mundus, Loew, Wien. Ent. Monats., vii, 1863, p. 16. 



In this species the black wing pattern (fig. 3) is less extended than in sinuatus, 

 but more than in excellens. It agrees in all respects with the following species, but 

 is distinguished by the characters given in the table. The basal half of the first 



Fig. 3. Wing of Ocneros mundus, Loew. 



posterior cell is in the present species wholly black, while in sinuatus it has a small, 

 rounded, hyaline dot and in excellens it is reached by the lower corner of the hyaline 

 indentation beyond the stigma. - 



