Asilidsefrom Aden and its neighhourhood. 83 



■discal cell ; fourth posterior cell narrowed towards the end, but not 

 -closed ; third hasal cell narrowly open at the margin of the wing. 



Five male specimens from Lahej. 



3. Saropogon pulverulentus, n. sp. ^ $. 

 (Plate II, fig. 2.) 



Thorax grey ; abdomen yellowish-rufous, with black lateral spots ; 

 mystax, antennae and legs yellow ; wings hyaline. 



Length 12.5 mm. 



Front covered with grey dust ; the ocelli black ; face golden 

 yellow ; mystax pale yellow ; occiput grey, with whitish hairs ; 

 ©cellar bristles also whitish. Antennae yellowish-rufous, the tip of 

 the third joint black ; second joint a little longer than the first, 

 with yellow bristles ; the third longer than the two basal joints 

 together. Proboscis black ; palpi rufous with yellow hairs. Thorax 

 black, but in well preserved specimens the thoracic dorsum thickly 

 clothed with a clear grey dust ; the shoulders and pleurae yellow ; 

 the prothorax and the posterior part of the thorax with many long, 

 pale yellow bristles ; scutellum and metanotum j^'ellowish-rufous ; 

 the bristles before the halteres yellow ; on the hind border of the 

 scutellum two yellow bristles crossing one another. Abdomen 

 rufous ; base of the first and second segments black ; the following 

 segments with black lateral spots, which sometimes extend along 

 the front borders ; first segment on each side with yellow bristles ; 

 male genitalia short, on the sides and beneath with long yellow 

 hairs. Legs yellowish-rufous ; the bristles of the tibiae yellow ; 

 those of the tarsi mostly black ; the spiir at the end of the front 

 tibiae and all the foot-claws black. Halteres brown. Wings hyaline 

 with yellow or jjale veins ; fourth posterior cell and third basal cell 

 closed at the hind margin of the wing. 



Several specimens of both sexes from Huswah and Shaik 

 Othman. 



This species is closely allied to Saropogon (Dasypogon) 

 mstifus, Wied. (Aussereur. Zweifl. ii, 406. 65), but it 

 differs in its somewhat larger size, the want of yellow 

 stripes on the thoracic dorsum and of the black tip to the 

 hind femora, and in the brown halteres. 



4. Saropogon riibriventris, n. sp. % 



Thorax yellowish with black stripes ; abdomen brownish-red ; 

 antennae and legs rufous ; mystax yellow ; wings subhyaline with 

 grey tip. 



