166 DIPTERA OF NORTH AMERICA. [PART III. 



dorsum ; the latter is but little pollinose. Abdomen darker 

 steel-blue, shining, especially on the sides. Feet black; the 

 knees and the first joint of the intermediate tarsi brick-red, the 

 first joint of the hind tarsi brown or reddish-brown towards 

 the basis. Halteres yellowish-white. Wings with four black 

 unconnected bands. The first of them lies, as in the preceding 

 species, on and immediately beyond the humeral crossvein and 

 reaches the basis of the anal cell. The second band begins at 

 the black stigma and runs, expanding somewhat, as far as the 

 posterior margin, in the vicinity of which it gradually becomes 

 fainter; the third band is narrow, perpendicular, and covers the 

 posterior crossvein ; the fourth runs along the apex of the wing, 

 is even broader than the second and completely isolated from the 

 third ; beyond the fourth longitudinal vein, it becomes very faint. 

 The last section of the fourth vein is rather strongly curved and 

 its latter portion converges towards the third vein. 



Hub. Brazil? Cuba? (Vienna Museum). 



Observation. — The description is drawn from a male specimen 

 in the Vienna Museum, labelled : Mann, Toscaua 1846. As I 

 have seen the same species, in other collections, marked as 

 Brazilian, I take the designation of the Vienna Museum to be 

 erroneous. I am confirmed in this supposition by the fact that 

 next to the above-mentioned specimen is placed another, a 

 female, pinned on the same kind of pin and labelled in the 

 same manner, which, however, is a specimen of E. stigmatias, 

 received hitherto from Cuba and Brazil only. Thus it appears 

 evident that both specimens were sent by the same collector, pro- 

 bably from the same country ; and as E. stigmatias is a common 

 species in Cuba, the conclusion is not too far fetched that both 

 specimens came from that island. This is the reason why I did 

 not like to omit E. alternans in this volume. 



12. E. stigmatias Loew. % 9.— (Tab. IX, f. 17.) Nigro-viridis, 

 macula atra inter antennas sita insignis, alarum fasciis nigris quatuor, 

 ulthnis duabus ad costam conjunctis. 



Blackish-green, conspicuous by a deep black spot between the antennae, 

 wings with four Mack bands, the last two of which are connected near 

 the costa. Long. corp. 0.13—0.15; long. al. 0.14—0.15. 



Syn. Euxesta stigmatias Loew, Berl. Ent. Zeitschr. XI, p. 310, Tab. II, f. 18. 



Head dark metallic-green or almost steel-blue. Front of a 

 dusky-red ; the little stripes running down from the vertex along 



