278 DIPTERA OF NORTH AMERICA. [PART II 



distinguished from others, and among all the other Dolichopodidiz 

 of the collection, there are only two specimens on similar pins, and 

 both are also marked "New Holland." A most careful compa- 

 rison of the latter specimens showed that they are P. sipho Say. 

 This circumstance renders it very probable that there was a mis- 

 take in the statement of the habitat. 



2. Abdomen at the basis yellow, not metallic. 



a. Tarsi for the most part black. 



IT. P. variegatus Loew, 9. — Viridi, chalybeo et eupreo varius, 

 modice nitens, proboscide, palpis, primis duobus antennarum articulis. 

 abdominis basi, ventre pedibusque flavis, coxis interrnediis cinereo- 

 maculatis, tarsis ex fusco nigris. 



Green, steel-blue and copper colored, variegated, moderately shining ; pro- 

 boscis, palpi, the two first joints of the antennae, the basis of the abdo- 

 men, the coxae and feet yellow ; middle coxa? spotted with gray : tarsi 

 brownish-black. Long. corp. 0.21. Long. al. 0.20. 



Syit. Psilopus variegatus Loew, Neue Beitr. VIII, 95, 14. 



Green, the most part of the upper side of the thorax and the 

 anterior part of the single segments of the abdomen coppery-red, 

 the front and seutellum blue. The lustre of the ground-color is 

 moderated by a slight whitish dust. Face greenish-blue, closely 

 dusted with white, reaching more downwards than usual ; without 

 hairs. Proboscis and palpi yellow. The two first antennal joints 

 yellowish, the second with very short minute black Jjristles ; the 

 arista dorsal, moderately long. Front blue, slightly dusted with 

 white, without hairs ; its usual black bristles of a moderate 

 length. The upper side of the thorax shows two longitudinal 

 lines of a coppery-red color, which are separated by a broad green 

 stripe ; each of them coalesces with a large coppery-red lateral 

 spot ; the upper side of the thorax is very probably not so 

 variegated in all specimens. The black bristles of the thorax of 

 medium length. Seutellum blue with a green tip ; the pair of 

 bristles inserted near its tip is rather large, that nearer to the 

 basis is more slender and much shorter. Pleune rather closely 

 dusted with white ; their hind margin colored with yellow. The 

 first segment of the abdomen yellow, near the basis blackish, on 

 the hind margin, excepting the middle, metallic-green and fringed 

 with a row of long black bristles ; the basal third of the second 



