DESCRIPTION OF THE SPECIES. 257 



margin of the front there are on each side two black bristles. 

 Antennae yellow; the blackish arista distinctly incrassated at the 

 basis. Face whitish; the anterior oral margin not at all pro- 

 jecting. Cheeks whitish, under the eyes with a more or less 

 brownish-red spot. Oral opening rather round. Proboscis 

 short. Palpi short, but broad, pale yellowish, with some short, 

 whitish pile. The upper and middle part of the occiput for the 

 most part black. The ordinary frontal bristles and some of the 

 bristles on the cheeks are black; otherwise the pile upon the 

 head consists of very scattered, bristle-like, or stubble-shaped 

 whitish hairs, which easily drop off. The upper side of the thorax 

 is shining black, very convex ; besides the usual black bristles, it 

 shows white, bristle-like hairs, which border the denuded stripes. 

 Metathorax with white pollen ; its lower part shining black ; 

 pleura? shining black, with some rare, stiff, bristle-like white hairs. 

 Abdomen short, shining black, at the root of the single segments 

 only somewhat glossy, in consequence of a very thin grayish pollen. 

 The scattered, very rough pile on the abdomen is whitish ; only 

 the posterior margin of the segments and partly also the middle 

 line of the abdomen, have black hairs. Ovipositor stout, conical, 

 not flattened, shining black, beset with black pile, somewhat 

 longer than the last three abdominal segments taken together. 

 Coxae and femora shining black, only the front femora on the 

 under side with a few black bristles ; the tip of the femora, the 

 tibiae, and the tarsi brownish-yellow or more reddish-yellow. 

 "Wings whitish-hyaline, short and rather broad, with very much 

 approximated and very perpendicular crossveins. The extreme 

 root of the wings is whitish ; next follows a rather large and 

 almost deep black spot, reaching as far as the axillary excision, 

 and not much beyond the basis of the small basal cells ; the first 

 two crossbands, which follow next, are connected near the anterior 

 margin and strongly diverge towards the posterior one ; the first 

 of them is even a little broader than the second and altogether 

 black, while the inner part of the second is partly brown ; the 

 third band is separated from the second, near the anterior margin, 

 only by a very narrow hyaline spot ; it borders the apex of the 

 wing far beyond the tip of the fourth longitudinal vein, but actu- 

 ally touches the margin of the wing only beyond the tip of the 

 third vein ; its inner portion is brown anteriorly. 



Hab. Mexico (coll. Winth.); New York (Ostcn-Sacken). 

 IT 



