168 Annals of the South African Museum. 



from all the other species in having the wiugs unspotted as in maculata, 

 with the cross-vein between the discoidal and the second posterior cell 

 not only angularly bent, but provided with a strong stump of vein 

 directed outwardly into the second posterior cell. Such a character is 

 known only for the North American species ampliites, Walk. I assume 

 therefore the present species to be the same as the Syrian one, 

 notwithstanding the very different habitat. 



Eyes touching in a line a little shorter than three times the small 

 ocellar tubercle. The base of the antennae and the sides of the 

 frontal triangle are pi-ovided with long white tufts ; first antennal 

 joint rather thin, with white scales on the outer side and below. 

 Abdomen clothed on the back with white scales, but with the four 

 rows of black spots not distinct. Legs black and white-scaled. Wings 

 greyish-hyaline, slightly yellowish along the costal cell, on the base of 

 the marginal and submarginal, and on the whole of the first basal cell. 



PETROROSS1A. 



PETROROSSIA HESPERUS TROPICALIS, subsp. n. 



A female specimen from S.W. Protectorate, Otjituo, January, 1920 

 (R. W. E. Tucker). 



The present subspecies is distinguished from the typical species by 

 the white-haired face and first antennal joint, by the complete red 

 stripe at the sides of the abdomen, by the mostly yellow femora, and 

 by the upper branch of the cubital fork devoid of appendage. 



Described originally from specimens from Nyassaland and other 

 Central African localities. 



ANTHRAX, Scop. 

 ANTHRAX FUSCIPENNIS, Ric. 



A male specimen from S.W. Protectorate, Otjituo, January, 1920 

 (R. W. E. Tucker). 



SPONGOSTYLUM, Macq. 

 SPONGOSTYLUM INCISURATA, Macq. 



A female specimen from S.W. Protectorate, Windhoek, December, 

 1919 (R. W. E. Tucker). 



THYRIDANTHRAX, Ost. Sack. 

 THYRIDANTHRAX LUGBNS, Loew. 



Some specimens from S.W. Protectorate, Grootfontein, January, 

 1920, and from Otjivarongo, February, 1920 (R. W. E. Tucker). 



