CHAPTER V. 



Family TABANID.5] (continued). 



Subfamily TABANIN^. 



Plate V., fig. 35 — Plate XII., fig. 95. 



In this subfamily, as in the Tabanidse as a whole, the vast majority 

 of species belong to the genus Tahanus. Besides Tahanus, 

 Hcematojjota, and Hippocentrum, species of which are illustrated in 

 the plates mentioned above, the only genera of Tabaninse at present 

 known to occur in the Ethiopian Region are Thaumastocera, 

 Holcoceria, and Parhcematopota, which were described in 1906 by 

 Dr. K. Griinberg,* and still consist of single species. The genus 

 Thaumastocera, which is nearly related to the South American 

 Stihasoma, Schin., was founded for Thaumastocera ahva, Griinb., 

 a West African species, with a remarkably shaped third antennal 

 joint, well-developed ocelli, and wings blotched and spotted with 

 black or clove-brown ; the third joint of the antenna has, at least 

 in the female, two deep notches in its upper margin, while in both 

 sexes the basal angle is produced into a long process reaching to the 

 level of the penultimate annulus. Holcoceria nohilis, Griinb., the 

 type of the genus Holcoceria, which is allied to Hcejnatopota, is a 

 black, elongate species, the type of which was taken at Langenburg, 

 on the north-eastern shore of Lake Nyasa (German East Africa) ; 

 it is 15.5 mm. in length, with long and stout antennae, a white stripe 

 on each side of the dorsum of the thorax, and deep black wings, 

 with a small, pale, transverse streak at the tip. Parhcematopota 

 (for P. cognata, Griinb., — German East Africa and Zanzibar) was 

 separated by its author from Hcematopota owing to the shape of the 

 first and third joints of the antennae, but it is doubtful whether these 

 characters are sufficient to warrant a generic distinction. 



* Gf. K. Griinberg, " Einige neuen Tabanidengattungen des athiopischen Faunen- 

 gebiets " : Zoologischer Anzeiger, XXX. Bd., pp. 349-362, with 13 figures in text. 



