DOLICHOPUS. 157 



r. Second joint of antennae shortest. Species 37. 

 r r. Second joint of antennae as long as first or third. Sp. 38. 

 A A. Hind metatarsus without spines. 

 C. Cilia of the lower orbit pale. 



*. Face descending at least as low as the jeyes. Species 39-42. 

 * *. Face not descending as low as the eyes. Species 43-46. 

 C C. Cilia of the lower orbit black. 

 t. Disc of scutellum pubescent. 

 . Femora dusky. Species 47. 

 u u. Femora and tibiaB pale. Species 52. 

 1 1. Disc of scutellum glabrous. 



v. Femora yellow. Species 48, 49. 

 v v. Femora dusky. Species 51. 



Section A. Hind metatarsus spined. 



These may be considered as the typical portion of the genus. 

 The lamellae of the male are usually dingy white (sometimes 

 yellowish), edged with black and fringed ; but dusky in species 3. 

 The first eleven species have the cilia of the lower orbit black ; as 

 are also the antennae, palpi, and the fringe of the alulae. 



1. atratus, Mg. zw. iv. 76. 3 (1824); Mq.; Stn.; Hal. Atro- 

 mrens, hypostomate albido, pedibvs nigris, femoribus posterioribus unispi- 

 nosis, alls dimidio exterwre nigricante ; Mas. tibiis et metatarsi* posticis 

 dense hispidis, alarum plaga saturatius nigra. Long. 2 ; alar. 4^ lin. 



Metallic blackish-green. Antennas with the third joint somewhat 

 pointed. Face dull silvery white. Wing* blackish in the outer half, 

 particularly in front, more intensely and determinately so in the male. 

 Black edge of lamella narrow. Legs dull black. Posterior femora with 

 a single spine (as in most). Hind tibia and metatarsus thick-set with 

 spines in the male (nearly twenty on each ; but only an ordinary num- 

 ber in the female). 



Common in swamps among mountains. (E. S. I.) 

 Obs. D. maculipennis, Ztt. d. s. 520. 17, an allied species, 

 differs, having two spines on the posterior femora, and the face 

 dull grey, not so narrow in the male. 



2. picipes, Mg. zw. iv. 76. 4 (1824). Obscure anew, hyposto- 

 mate albo, pedibus piceis, alis fuscanis, tibiis et metatarsis posticis dense 

 hispidis. Long. 2| lin. 



Front blackish in male, white in female. Face silvery wnite. Thorax 

 dark golden green, the sides slate-grey. Abdomen metallic green, in 

 some lights with bluish-grey reflections, the incisures black (as is the 

 case more or less with most of the species). Wings entirely dusky, 

 rather darker at the fore edge. Black edge of lamellae very narrow. 

 Legs piceous, hind tibia and metatarsus very thickly spined on the outside. 



