DESCRIPTION OP THE SPECIES. 47 



before the suture a bronze-colored spot. Fore coxse yellow, upon 

 the anterior side with black pubescence. The four posterior coxge 

 yellow only at the extreme tip. Feet yellow ; hind femora with a 

 bristle before the tip. The color of the fore tarsi changes from 

 brown into black towards the tip ; middle tarsi blackened from 

 the tip of the first joint ; the hind tarsi are of the same color. 

 Cilia of the tegulse yellowish. Wings grayish-hyaline, the fourth 

 longitudinal vein not broken. 



Male. The larnellre of the hypopygium whitish, of medium size 

 and of ah elongated, ovate shape, on the upper and apical margin 

 narrowly bordered with black, on the latter much jagged and fringed 

 with partly black, partly yellowish bristles. Hind femora upon 

 the under side sparsely ciliated with very long yellowish hairs. 

 Hind tibia? although somewhat stout, but not thickened ; the two- 

 thirds of their hind side from the base are without hairs. Fore 

 tarsi over 1^ times the length of the tibiae ; their three first joints 

 slender, stalk-like ; the second joint measures nearly three-fourths 

 of the length of the first, and the third more than three-fourths of 

 the length of the second ; the fourth joint is almost as long as the 

 third, flattened somewhat broader at the end, still even here not 

 half as broad as it is long, white, with a handsome silvery reflec- 

 tion ; upon its upper margin with hardly visible short minute 

 black hairs ; the fifth joint is hardly shorter than the fourth, flat- 

 tened, and somewhat broader than the previous one, black, beset 

 upon the upper margin with short appressed minute black hairs. 

 The costa near the tip of the first longitudinal vein with a not 

 very considerable but quite distinct swelling ;" the margin of the 

 wing between the apex and the tip of the fifth longitudinal vein is 

 less rounded than usual, so that there is a trace of a shallow 

 sinus. 



Hab. New York. (Osten-Sacken.) Mass. (Sanborn.) 



19. I>. tonsils LOEW. and 9 . Aeneo-viridis, pedibus flavis, coxis 

 anticis tibiisque posticis totis concoloribus, antennis tarsisque posticis 

 nigris, horum basi flava, ciliis oculorum inferioribus tegularumque ciliis 

 flavicantibus, maris duobus ultimis tarsorum anticorum articulis dila- 

 tatis et femoribus posticis non ciliatis. 



Metallic-green ; fore coxae and feet yellow, the hind tibiae not darker at 

 the tip ; antennse and hind tarsi black, the latter at the basis yellow ; 

 cilia of the inferior orbit and of the tegtilse yellowish ; in the the two 



