ORTALIDiE — EP1PLATEA. 195 



the vertex along the sides of the front and the ocellar triangle 

 are of the same color as the front and hence indistinct. 

 Antennae not reaching quite to the edge of the mouth ; the first 

 two joints of the color of the head, or a little lighter; the oval 

 third joint dark-brown, often quite black; the arista thin and 

 bare. Face excavated under each antenna, longitudinally con- 

 vex between these depressions ; descending vertically in profile ; 

 the anterior edge of the mouth is strongly drawn upwards, so 

 that the clypeus projects considerably above it. Proboscis stout ; 

 palpi brown, generally paler towards the tip. The thoracic 

 dorsum generally has, on the posterior side, an almost silvery- 

 white transverse crossband, and before the transverse suture, on 

 each side, a large spot of a similar pollen ; these pollinose spots 

 are very distinct, when seen by reflected light, but can easily 

 be overlooked in any other light. Upon the pleurae likewise 

 there are two spots of white pollen ; one of them lies over the 

 fore coxae, the other immediately under the longitudinal suture 

 of the pleura3, where the color is generally darker-brown. The 

 front part of the coxae is likewise covered with a white pollen, 

 which, however, sometimes is entirely invisible. Abdomen black, 

 somewhat glossy, generally brown at the basis, with a rather 

 coarse pubescence, which is longer and black on the posterior 

 margins of the segments. The flattened ovipositor is somewhat 

 attenuate, its first two segments black, the third orange-yellow. 

 Feet of the same color as the body; tibiae and tarsi darker 

 brown, in fully colored individuals brownish-black. Halteres 

 yellowish. Wings of very moderate length, rather broad, 

 hyaline, with brown veins ; the basis of the wings as far as the 

 humeral crossvein and the anal cell are brownish ; a narrow 

 brownish-black band begins at the costa, where it is confluent 

 with the small black stigma and a black spot, lying at the end of 

 the costal cell; it runs over the bases of the submarginal, discal, 

 and third posterior cells, as far as the sixth longitudinal vein, 

 which its end alone crosses a little; before the apex of the wing 

 there is a broader crossband, which is sinuate on both sides, 

 weaker, however, on the inside than on the outside ; posteriorly 

 it bifurcates in two short, obtuse branches, the inner one of 

 which reaches the margin of the wing and covers the perpen- 

 dicular posterior crossvein ; the outside one is shorter and ends 

 in the second posterior cell, some distance from the margin of 



