108 DIPTERA OF NORTH AMERICA. [PART III. 



13. E. elllta Loew. % J.— (Tab. IX, f. 18.) Nigro-viridis, sub- 

 chalybescens, macula atra inter antennas sita insignis, alarum fasciis 

 nigris quatuor, secunda latissima sed maximS, ex parte valde eluta, 

 tertia et quarta iu cellula costali per maculam liyalinaui separatis. 



Blackish-green, verging ou steel-blue, conspicuous by a deep black spot 

 lying between the antennae ; wings with four black bands, the second 

 of which is the broadest, but, for the most part, very pale ; the third 

 and fourth are separated by a hyaline spot, lying in the costal cell. 

 Long. corp. 0.14-0.15; long al. 0.14—0.15. 



Syn. Euxesta eluta Loew, Berl. Ent. Zeitschr. XI, p. 312, Tab. II, f. 19. 



Front red or brownish-red ; the little stripes, descending from 

 the vertex along the orbits of the eyes and the well-defined ocellar 

 triangle, are shining steel-blue ; the hairs on the front are not 

 striking, moderately dense on the but slightly pollinose lateral 

 borders; otherwise very scarce. Occiput blackish-steelblue, with 

 a grayish-white bloom. Antennae ferruginous-brown or reddish- 

 brown, more brick-red at the basis of the third joint; sometimes 

 the second joint has the same coloring. Face rather excavated, 

 generally steel-blue, or at least reddish along the anterior edge 

 of the mouth only ; in some rare cases it has a light steel-blue 

 reflection on its upper part, the remainder brick-red ; exactly be- 

 tween the antenna? is a conspicuous velvety-black spot; clypeus 

 but little projecting beyond the edge of the mouth, reddish-brown, 

 with a steel-blue reflection ; the orbits of the eyes brick-red or 

 brownish-red near the lower corner of the eye. Thorax dark 

 metallic-green ; in less mature specimens greenish steel-blue. 

 Thoracic dorsum only slightly pollinose. Scutellum more black- 

 ish-green or blackish-blue. The color of the abdomen is not 

 unlike that of the thorax, but is darker and verges on bluish ; 

 its middle sometimes almost violet; the last segments of the 

 male abdomen sometimes bronze-colored. Front coxae, except 

 the root, brick-red, with white pollen. Feet black, the tips of 

 the knees and the root of all the tarsi brick-red ; the tip of the 

 middle tibiae likewise is generally brick-red ; sometimes the 

 extreme tip of the front tibia? shows a brick-red coloring. Hal- 

 teres yellowish-white. Wings with four black crossbands. The 

 first lies upon and immediately beyond the humeral crossvein 

 and extends to the extreme basis of the anal cell ; it is rather 

 narrow and often pallid. The second crossband is of con- 

 siderable breadth, begins near the costa with the infuscated tip 

 of the costal cell and the black stigma; but beyond the third, 



