156 DIPTERA OF NORTH AMERICA. [PART III. 



3. E. liotata Wied. % 9.— (Tab. IX, fig. 9.) Chalybeo-nigra, 

 abdomine feminae fascia apicali flava ornato, pedibus nigris, genibus, 

 tarsorurnque basi rufis, alarum maculis duabus nigris, altera costali 

 minuta, altera apicali trigona, cellulae costalis basi et stigmate cinereis. 



Bluisb-black, abdomen of the female with a yellow crossband at the tip, 

 feet black, knees and the root of all the tarsi red; wings with a smalt 

 black dot in the middle of the costa and with a larger triangular spot 

 at the tip ; basis of the costal cell and stigma gray. Long. corp. U.15 — 

 0.16; long. al. 0.15. 



Syn. Ortalis notata Wied. Auss. Zweifl. II, p. 462, 9. 



Euxesta notata Loew, Berl. Ent. Zeitschr. XI, p. 300, Tab. II, f. 9. 



Of a blackish-steelblue, generally verging on green-blue, often 

 with a violet hue on the middle of the abdomen ; rather shining. 

 Front of a saturate yellowish-red, sometimes almost yellowish- 

 brown; with a whitish pollen along the lateral orbit of the eyes; 

 the black hairs are scattered and not conspicuous ; the swellings 

 running from the vertex downwards, along the borders of the 

 eyes, generally also the immediate vicinity of the ocelli are shining 

 bluish-black or black. Antennae brown, ferruginous-red at the 

 basis, which color is more extended on the inner side ; third joint 

 rounded. The very considerably excavated face, together with 

 the rather projecting clypeus are bluish-black, very shining ; the 

 ■upper portion rather densely pollinose, and hence opaque, the 

 ground color not being distinctly visible ; the lateral swellings 

 of the face are tinged with brownish-red and thinly whitish 

 pollinose. The female has the latter part of the last abdominal 

 segment, as well as the basis of the ovipositor of a saturate yellow 

 color ; in the male, I have never observed any trace of this yellow 

 coloring. The first segment of the very much flattened ovipositor 

 is of a very moderate breadth, brownish-black, but with a more 

 or less distinct coppery-red reflection. Feet black, femora in 

 part metallic-black or bluish-black ; knees and the root of all the 

 tarsi brick-red, on the front tarsi this red generally reaches only 

 as far as the middle of the first joint, on the hind tarsi as far as 

 the tip, on the intermediate ones as far as the basis of the next 

 joint. Knob of halteres yellowish; stein generally infuscated. 

 Wings hyaline with rather dark veins; at the tip of the costal 

 cell there is a small black dot, which extends posteriorly as far 

 as the second longitudinal vein; at the apex of the wing there is 

 a larger triangular black spot, occupying the end of the sub- 



