166 Annals of the South African Museum. 



ADDITIONS. 

 I. 



The following South African species of Bombycidse are from the 

 South- West Protectorate (Damaraland), the dipterous fauna of which 

 is as yet very little known. 



SYSTOECHUS, Loew. 

 SYSTOECHUS CTENOPTERUS, Mikn. 



A female specimen from S.W. Protectorate, Grootfontein, January, 

 1920 (R. W. E. Tucker). 



EURYCARENUS, Loew. 

 The three South African species may be tabulated as follows : 



1(4). First posterior cell with a rather long stalk at end; abdominal 

 segments destitute of silvery tomentum on hind border. 



2 (3). Tarsi and tibiae yellowish, the hind tibiae with silvery scales ; abdomen 



with a white longitudinal stripe in the middle; species of large 

 . _ . . laticeps, Loew. 



3 (2). Tarsi and tibiae quite black, those of the hind pair with black scales ; 



abdomen without white middle stripe ; species of smaller size 



minimus, sp. nov. 



4 (1). First posterior cell almost sessile at end ; abdomen with narrow bands 



of silvery toment at hind border of segments, and clothed moreover 

 with a white pubescence sessilis, Bez. 



EURYCARENUS MINIMUS, sp. nov. 



A species of smaller size like sessilis, but with the first posterior cell 

 stalked as in laticeps, and differing from both in the abdominal pattern. 



Type c? and an additional specimen of the same sex from S.W. 

 Protectorate, Tsumeb, December, 1919 (R. W. E. Tucker). 



(J. Length of the body 7-8 mm.; of the wing 6'5-7'5 mm. 

 Head as in laticeps, but the eyes of male approaching only at a point, 

 without being in contact ; frons and face with long, erect black hairs 

 on the middle with soft golden-yellow hairs beneath them, and on the 

 sides with long silvery hairs ; palpi black with reddish base ; proboscis 

 entirely black, 3-3'5 mm. long. Antennae entirely black ; third joint 

 linear,' twice as long as the two first joints together. Thorax and 

 scutelluni entirely black ; on the back they are clothed with a golden- 

 yellow soft pubescence, while on the pleurae the pubescence is white ; 

 dorsal macrochaetae black, those of the pleurae white; halteres 

 whitish, the knob infuscated at base ; squamulae dirty whitish, with 

 a dark border and with whitish fringe. Abdomen entirely black, 

 with complete rows of strong, erect, black bristles at the hind border 



