CAMPSICNEMUS. 193 



Gen. XXXIII. CAMPSICAEMt S. 



Characters. The first joint of the antennae without hairs on the 

 upper side ; the third more or less pointed, distinctly hairy ; the 

 arista inserted on its back, near the basis. Face upwards very 

 narrow, especially in the male. The metathorax is elongated ; 

 the abdomen flattened. The small hypopygium imbedded ; its 

 appendages extremely small. Feet slender ; the first joint of the 

 hind tarsi without bristles. The males are usually remarkable by 

 the peculiar structure of their tibiae and often also of the tarsi. 

 The last segment of the fourth longitudinal vein, about its first 

 quarter, runs over a distinct convexity of the wing, is parallel to 

 the third longitudinal vein and ends beyond the tip of the wing. 



The genus Campsicnemns possesses so many remarkable cha- 

 racters that the species belonging to it cannot either be mistaken 

 or confounded with species of another genus. The name of the 

 genus (from xd^ij, the curve, and xir^, the tibia) was given be- 

 cause the males of many species are distinguished by the peculiar 

 curvature of their middle tibia?. 



The species hitherto known belong to Europe and North Ame- 

 rica. 



Description of the Species. 



1. C birtipes Loew. % and 9- — Obscure olivaceus, facie ochracea, 

 alis infuscatis, coxis anticis pedibusque ex testaceo runs, tarsis prseter 

 basim ex fusco nigris. 



£ . Prime- tibiarum intermediarum dimidio iucrassato, tarsisque anticis 

 setas longiores gereutibus. 



9» Pedibns siniplicibus. 



Dark olive-brown, face oclire-colored ; wings blackish-gray ; fore coxre and 

 feet brownish-red ; tarsi black-brown with the exception of the root. 



% . The thickened basal half of the middle tibia? and the fore tarsi beset 

 with long bristles. 



J. Feet plain. Long. corp. 0.08. Long. al. 0.13. 



Sys. Campsicnemns hirtipes Loew, Neue Beitr. VIII, 68, 1. 



Metallic olive-brown. Pace very narrow, yellowish-brown, 

 with a bright golden-green spot immediately under the antennae, 

 which is not always easily discernible. Antennae entirely black ; 

 their third joint in the male long and pointed, in the female short 



