MEDETERUS. 219 



Blackish, without metallic lustre. Face opaque from brown 

 dust; its ground-color seems to be greenish-black, below the trans- 

 verse swelling, above it of a purer black. Palpi and proboscis 

 shining black. Antennae black. Front opaque from brown dust. 

 The cilia of the inferior orbit pale. The anterior half of the upper 

 side of the thorax is brown with dust and has two distinct, yellow- 

 ish-white longitudinal stripes, which reach from the anterior mar- 

 gin as far as the impression upon the posterior half; this impres- 

 sion and the scutellum are covered with grayish-white dust. The 

 upper part of the pleurae is covered with brownish-gray dust ; the 

 bristles above the fore coxaa are black. Abdomen black without 

 any distinct trace of dust. Coxae and feet black ; fore coxae very 

 glabrous, only with a few black bristles near the tip ; the extreme 

 tip of the knees dark pitch-brown (which might be easily over- 

 looked). The second joint of the hind tarsi is three times the length 

 of the first one. Cilia of the tegulae whitish. Halteres whitish 

 with a darker peduncle. Wings hyaline, scarcely a little tinged 

 with gray, with dark-brown veins ; the posterior transverse vein 

 distant from the margin of the wing somewhat more than its own 

 length ; the third longitudinal vein ends close before the tip of the 

 wing ; the last segment of the fourth longitudinal vein is uncom- 

 monly straight and its end lies close to the end of the third longi- 

 tudinal vein. 



Hab. Middle States. (Osten-Sacken.) 



2. M. veles Loew. % . — Nigricans, antennis concoloribus, facie opaca, 

 pedibus testaceis, fernoruin dimidio basali ex nigro piceo, alis subhyalinis, 

 maris hypopygio atro, nitido, ovato, subsessili. 



Blackisb, antennae of the same color ; face opaque ; feet yellowish, basal 

 half of the femora brownish-black; wings rather hyaline, hypopygium 

 black, ovate, almost sessile. Long. corp. 0.11. Long. al. 0.11. 



So. Medeterus veles Loew, Neue Beitr. VIII, 73, 2. 



Blackish, without metallic lustre. Face opaque from brownish- 

 gray dust ; its ground-color is black, more distinct upon the part 

 below the transverse swelling, the dust there having been rubbed 

 off. Palpi and proboscis black, shining. Antennae black. Front 

 opaque from brown-gray dust. The upper side of the thorax is 

 marked in a similar manner as in the preceding species, but the 

 dust on the anterior half is more gray and that on the posterior 

 half and on the scutellum, at least in the described specimen, less 



