DESCRIPTION OF THE SPECIES. 43 



posticis nigris, ciliis oculorum inferioribus tegularumque ciliis flavican- 



tibus. 



. Tarsis anticis elongatis tenuibus, articulo ultimo dilatato atro, feruo- 



ribus posticis rare flavo-ciliatis. 



Green, shining ; fore coxse and feet yellow ; tip of the hind tibise brownish ; 



antenuse and hind tarsi black ; cilia of the inferior orbit and of the tegulse 



yellowish. 

 . Fore tarsi elongated, slender ; the enlarged last joint black ; the hind 



femora sparsely ciliated with yellow. 

 ....... Long. corp. 0.210.22. Long. al. 0.25. 



Metallic-green, bright. Front metallic-green. Antennae black ; 

 on the under side of the first joint I am not able to discover any 

 lighter coloring ; third joint rather blunt at the tip. Face gray- 

 ish-yellow, nearly ochre-yellow. Palpi yellow. Cilia of the in- 

 ferior orbit pale-yellowish. Hypopygium black ; lamella? of medium 

 size, ovate, white, with narrow black border, on the apical margin 

 somewhat jagged and fringed with black bristles. The four poste- 

 rior coxa? blackish with yellow tip. Fore coxa? yellow, only at 

 the extreme basis somewhat blackened, upon the anterior side 

 beset with very delicate black hairs, which do not reach to their 

 .-base. Feet pale yellow. Hind femora with a bristle before the 

 tip, upon the greater part of the under side sparsely ciliated with 

 moderately long yellowish hairs. Hind tibia? stout, but not 

 exactly thickened, not hairy upon the first half of the hind side ; 

 brownish at the extreme end. Fore tarsi twice as long, as the 

 tibia? ; their four first joints very slender, yellow ; the first joint 

 nearly as long as the three following ones together ; the third 

 somewhat shorter than the second ; the fourth hardly half as long 

 as the third ; the fifth joint black, flattened, broad, still not as large 

 as in D. batillifer ; upon its upper edge it is beset with appressed 

 minute black hairs. Middle tarsi from the tip of the first joint 

 blackened. Hind tarsi entirely black. Cilia of the tegula? yel- 

 lowish-white. Wings hyaline, somewhat grayish, at the tip of the 

 first longitudinal vein with a long but not very stout swelling, 

 which gradually merges into the costa ; fourth longitudinal vein 

 not broken. 



Hob. Fort Resolution, Hudson's Bay Territory. (Kennicott.) 

 Observation. The necessary data for the distinction of this 

 species from the foregoing, is contained in the description of the 

 latter. 



