96 Mr. F. M. van der Wulp on 



Scutellum cinereous, densely clothed with erect whitish bristles. 

 Abdomen cinereous, elongate, slightly narrowed behind ; each seg- 

 ment with a blackish spot on the front border ; a row of erect 

 whitish bristles on the hind margin of the first segment and a row 

 of similar bristles, directed backwards, on the front margin of the 

 second segment ; at the sides these Ijristles are concentrated into a 

 tuft ; the tip of the second and third segments with two or three 

 whitish bristles at the sides ; genitalia (fig. 9) black. Legs black, 

 but appearing somewhat greyish on account of a short, dense, white 

 pilosity ; knees and the base of the lil:)ia; rufous-piceous ; most of 

 the bristles on the femora and tibiae are whitish, but at the tip of the 

 femora and on the front-side of the fore tibia3 there are some black 

 ones ; the bristles of the tarsi are as a rule black, some only on the 

 fore tarsi being white ; foot-claws black ; pulvilli yellow. Halteres 

 yellow. Wings (fig. 10) greyish-hyaline ; the costa, from the middle 

 to the tip, with a narrow brown border ; veins black ; small cross- 

 vein a little beyond the middle of the discal cell. 

 Two male specimens from Aden. 



22. ItamiLS sodalis, n. sp. ^ $ . 



Thorax cinereous with black stripes ; abdomen black with grey 

 hind borders of the segments ; antennse black ; legs rufous ; wings 

 brownish-hyaline. 



Length 15-18 mm. 



Head cinereous ; face with white reflections, slightly narrowed 

 towards the antenna? ; mystax yellowish-white, not ascending above 

 the oral margin ; beard white ; occiput with whitish hair, and with 

 a row of black bristles above. Antennse brownish-black ; the basal 

 joints with some black bristles ; third joint as long as the first, 

 pointed towards the tip. Proboscis and palpi black, the palpi with 

 pale hairs. Thorax and scutellum cinereous ; thoracic dorsum with 

 distinct, broad, black stripes, the median stripe double, the lateral 

 ones interrupted on the transverse suture ; pleura? grey ; some strong 

 black bristles on the posterior part of the thorax and laterally behind 

 the suture ; the bristly hairs before the halteres yellowish ; scutellum 

 without hairs or bristles. Abdomen velvety black, without any 

 metallic reflection ; the lateral and hind borders of the segments and 

 the whole ventral surface grey ; yellowish bristly hairs situated 

 laterally on the first and second segments ; the male genitalia 

 (PI. Ill, fig. 11) shining black, proportionally large, the forceps 

 with white hairs beneath ; ovipositor (fig. 12) of the female elongate, 

 black, formed by the sixth, seventh and eighth segments. Legs 



