70 



In general appearance, this species is very like the European X. 

 femorata; but it differs especially in the color of the coxae, which in 

 the latter are black. Minor differences are that in X. femorata the 

 Avings are more uniformly colored, less tinged with brown on the 

 distal half, the stigma paler, etc. 



8. Xylota curvipes Lotio ? 



Among the specimens of Xylota vecors brought by Mr. Morrison 

 from the White Mountains I found one, which is larger than the others 

 (about 15 m. m.), has altogether black coxae, the hind femora stronger 

 and beset on the under side w4th yellowish hairs, longer and more con- 

 spicuous than similar hairs which exist in X. vecors; the hind tibiae, 

 somewhat more strongly curved and ending in a short, stout spur; 

 they are beset on the inner side with very conspicuous, long, erect 

 black hairs ; the halteres are altogether reddish ; the antennal arista 

 dark brown, etc. Xow all these characters, in which this specimen 

 differs from X. vecors, belong to the European X. curvipes Loew, 

 Neue Beitr. II, 19. As I have no specimen from the latter for com- 

 parison, I cannot settle the question of their identity, but I draw 

 the attention of collectors to this undoubtedly distinct species. We 

 have in this instance one of those curious cases of parallelism, as they 

 so frequently occur between the two faunas. As X. femorata in 

 Europe is supplemented by the closely resembling X. curvipes, the 

 American representative of X. femorata'. X. vecors, has alongside 

 of it a species either identical or closely resembling X. curiupes. 



Mixtemyia epliippium n. sp. i . 



Face yellow, with a brown stripe in the middle, which does not quite reach 

 the antennae; the latter brown; second joint almost black; triangle of the 

 vertex dark browii. Thorax dark brown; a brownish-yellow angular line 

 runs from the scutellum, above the root of the wings, turning inside to follow 

 the thoracic transverse suture and stopping before meeting the corresponding 

 line on the other side; a less distinct angular line, on the anterior part of the 

 thorax, begins on each side, at the yellow humeral tubercle, follows the 

 anterior margin of the thorax and before reaching its middle, turns backwards; 

 in the middle of the anterior margin, between the two angular lines, two del- 

 icate, short parallel yellow lines are perceptible. Rcutellum brown in the 

 middle, with yellow borders. Pleurae brown; a yellow spot above the root of 

 the front coxae. Abdomen light brown; second segment with an arcuated yel- 

 low stripe, resting with its middle on the anterior,'with its ends on the posterior 

 margin which is also yellow; the inside of the semi-circle thus formed, is dark 



