200 DOLICHOPID^, 



Barh hramj, not shining. Tace silvery -wJnte in male, face and front 

 grey in the female. Antennae with the third joint elongated lanceolate 

 in the male, and the arista scarcely half its length, but in the female 

 half as long again as the antennae. Wings brownish-hyaline. Outer 

 appendages of lujpopyg'mm long, slender, but dilated at the base to 

 about a third of their length and forming an angle ; inner ones ending 

 in a short pale spine, and a little ddated before the tip. Rind legs of 

 the male entirely black ; in the others the tip of the femora, tlie tibiee, 

 and the base of the tarsi yellowish ; the middle femora fringed beneath 

 with white hairs, the fore pair with a few long hairs at the base only ; the 

 middle coxte with a long spur ; the first two joints of the fore tarsus 

 nearly equal in length, compressed, the metatarsus hairy above ; in the 

 female the femora yellow, the anterior ones blackish at the base, the 

 hind pair slightly so at the tip, and all the tibise yellow ; the fore tibice 

 are strongly bipectlnated , the hind femora have a single spine in front 

 near the tip. 



Not uncommon. (E. I.) 



11. gravipes, (Hal. MSS.) Obscure ceneum, opacum, hypostomate 

 albo, pedibus nigris, femoribus posticis tmispinosis, tibiis anterioribus 

 flavidis, metutarso antico ojnce dilatato, hypopygii appendicibus externis 

 linearibus elongatis, Mas. Long. 2\ ; alar. 5 lin. 



Male. Bark brassy, not shining. Face white. Antenna; as long 

 as the arista. Thorax with the two black stripes rather marked. 

 Wings brownish-hyaline. Outer appendages of the hypopjygiimi linear, 

 hairjr, dark rust-bi"own, nearly twice as long as the inner ones, which 

 are straight, parallel, not dilated. Anterior tibiae, with the tip of the 

 femora and the base of the tarsi, yellow; spines of the fore tibia not 

 numerous ; first joint of the fore tarsus nearly as long as the rest 

 together, compressed and dilated at the tip ; the middle tarsi very 

 slightly and gradually dilated at the tip. Hind legs hXixck, femora with 

 a single spir/e ; metatarsus with a short spine above near the middle. — 

 Rh. confine, Ztt., seems to differ, having the second pair of legs yellow, 

 with only the last joint of the tarsus black and strongly dilated, and 

 probably the hind femora unarmed. 



Rare. In Mr. Walker's collection. (E.) 



12. antennatum, Carlier ann. soc. ent.fr. iv. 659 (1835); Lw. 

 Firidi-geneum, pedibus fiavis, genubus tibiis tarsisque posticis nigricanti- 

 bus, femoribus posticis unispinosis ; Mas. arista capitata, hypopygii 

 appendicibus externis apice attenuatis, hypostomate argenteo. Long. 1|- ; 

 alar. 3-i- lin. 



Brassy-green. Face silvery- white in male, didl whitish in female. 

 Arista longer than the antennae, with the tip enlarged into an oval plate 

 in the male. Wings smoky-hyaline. Outer appendages of the hypopy- 

 gium much longer than the inner, dingy yellow, pretty broad towards 

 the base, gradually attenuated and almost pointed at the tip ; inner 



