24 PROF. M. BEZZI. 



bristle ; the blackish pattern is in general of the usual type, but the costal cells 

 are not margined with black, and thus the base of the wings is broadly whitish 

 hyaline, without dark markings ; the short stigma is black ; the first hyaline 

 indentation of the fore border ends at the 3rd longitudinal vein, while the second 

 enters with a short point into the first posterior cell. At the hind border there are 

 4 hyaline spots, 2 in the 2nd and 2 in the 3rd posterior cell ; the first or basal is the 

 largest of all, of rounded shape and fused with the hyaline axillary cell ; the second 

 is a rather small and rounded spot ; the third is a narrow, long, sinuous indentation, 

 which along the hind cross- vein reaches the 4th longitudinal vein ; the fourth or 

 last is a spot of oval outline, placed at about the middle of the third posterior cell. 

 The veins are black, but they are pale yellowish at base, and ferruginous in the 

 hyaline indentations of the fore border. 



Type $, a single specimen in the author's collection from Erythraea, Ghinda 

 (Dr. A. Mochi). It is curious to note that Dr. Mochi has found in Erythraea the 

 present species alone, which is certainly different from the four other species 

 previously found in Erythraea. 



6. Tephrella hessii, Wiedemann (1819). 



Originally described from the Cape, and never recorded subsequently. 



I place this species here provisionally, on account of its wing pattern, which is 

 however more marked than in the preceding species. It consists of 2 hyaline inden- 

 tations at the fore border and 4 at the hind border, 2 in the 2nd and 2 in the 3rd 

 posterior cell ; there are besides a broad apical hyaline spot, another hyaline spot 

 below the end of the 2nd longitudinal vein (as in cyclopica) and a small hyaline 

 triangular indentation at the end of the submarginal cell. 



III. Subfamily TRYPANEINAE. 

 XXV. Platensina, Enderlein (1911). 



This Oriental genus, which was independently described by me in 1913 under the 

 name of Tephrostola, is well represented also in the Ethiopian fauna. It belongs to 

 the group of the forms which must be considered as a connecting link between the 

 two subfamilies, Ceratitinae and Trypaneinae, and between the forms with an 

 indented and those with a reticulate wing pattern. With these forms are to be 

 included the " genus " Tephrella (which owing to the fact of its Aciura-like wing 

 pattern was placed by me at the end of the preceding subfamily), and the ; ' genera " 

 Platensina, Plionielaena and Spathulina, in which the pattern is more like the 

 reticulate type, but in which the black parts always predominate over the hyaline 

 ones. 



In the present subfamily the distinction of the genera is even more unsatisfactory, 

 and I have based it mainly on the characters of the wing pattern ; but there are 

 passages from Plionielaena to Euaresta and from the latter to Euribia, and thus it 

 is not always easy to find a definite means of distinguishing them. In the table of 

 the genera I have placed Tephrella' and Platensina in both subfamilies, because in 

 some cases a doubt may arise as to whether the occipital bristles are of the Ceratitine 

 or of the Trypaneine type. 



