CHRYSOTUS. 175 



II. The third joint of tiik axtkxx.i; .not elongated at all. 



A. Femora of a dark color. 

 A. Ground color of the palpi pale 



2. C> longimanus Loew. %. — Viridis, nitens, palpis albis, tarsis 

 anterioribus tenuibus et longis. 



Green, shining, palpi white, the four anterior tarsi long and slender. Long. 



corp. 0.14. Long. al. 0.14. 

 Syn. Chrysotus longimanus Loew, Neue Beitr. VIII, 02, 1. 



Shining green. Face of uniform, and for a male, rather consi- 

 derable breadth ; the covering of white dust does not entirely con- 

 ceal the green-blue ground color. Palpi white, not very broad, 

 hut for a male rather long. The third joint of the antennae not 

 large, rather kidney-shaped ; the position of the arista rather pre- 

 cisely apical. Front metallic-green, very little dusty and towards 

 the vertex very little enlarged. Upper side of the thorax covered 

 only with a thin brownish-yellow dust. Coxa? and femora black 

 with a blue-green metallic lustre, which is more distinct on the 

 femora; the tip of the fore coxae yellow, the tip of the posterior 

 coxae dusky-brown. On the anterior feet the tip of the femora, 

 the tibiae and the greatest part of the first joint of the tarsi are 

 yellow ; the remainder of the unusually slender and long fore tarsi 

 is dark brown ; the hind tibia? are yellow, but distinctly infnscated 

 at the tip; the hind tarsi are dark brown. The hair upon the 

 feet is short and the bristles very scarce. Cilia of the teguloe 

 pale. Wings distinctly tinged with gray and with rather black 

 veins. The posterior transverse vein is more distant from the 

 root of the wing than in most of the other species. 



Hab. Middle States. 



3. C. validus Loew. 9- — AureO-viridis, nitens, palpis Mavis, basim 

 versus nigricantibus, pedihus flavis, femoribus postiois excepto apioe 

 nigris, viridi-micantibus, femoribus anticis nigro lituratis. 



Golden-green, shining, palpi yellow, towards the L.-isis blackish ; feet yel- 

 low, hind femora with the exception of the tip black, with greenish lus- 

 tre, the anterior femora striped with black. Long. corp. 0.13. Long, 

 al. 0.13. 



Syn. Chrysotus validus Loew, Neue Beitr. VIII, 03, 2. 



Golden-green, shining. Face for a female of moderate breadth ; 



