216 



DOLICHOPID^E. 



segment. Ungues of the fore tarsi whitish, slightly lengthened. Fern. 

 Hypostoma as broad as the front, short, hoary, with a transverse 

 suture in the middle. Palpi black, with ferruginous tips, larger than 

 in the male. Ungues short. 



Eare. (E. I.) 



2. obscurellus, Ztt. i. 1. 706. 2. d. s. 492. 2 (1843). Nigro- 

 aneus, antennis hypostomate halteribus pedibusque nigris, alls hyalinis ad 

 costam subfumatis. Long. 1-1 ; alar. 2^-3 lin. 



Black, dull. Thorax in certain aspects with a slight brassy hue, especially 

 on the hinder part, slaty-black beneath. Wings smoky-brown towards 

 the costa. Halteres black. Legs brownish-black. Male. Abdominal 

 appendages veiy short. Ungues of the fore tarsi a little longer than 

 the others. 



Eare. In Mr. Haliday's collection. (E. I.) 



Genus XIII. CHRYSOTUS. 



CHRYSOTUS, Mg. zw. iv. 40 (1824) ; Mq. ; Ztt. Dolichopus p., Fb. 

 s. a. ; Wd. ; Fin. Musca p., Fb. 



Antenna articulo tertio patellaformi, arista apicali. Oculifronte dis- 

 tantes, infra antennas contigui in mare. Alee divaricates, vena trans- 

 versa a margine distante. Hypopygium marls subimmersum, subtus 

 appendicibus binis oblongis deflexis. Tibia spinulosa. 

 Antenna short, the first three joints nearly of equal length, the first 

 naked, the third joint broader than long, rounded, with the arista at the 

 tip. Eyes almost glabrous, distant on the front, meeting below the an- 

 tenna in the male, divided by a rather narrow face in the female. Proboscis 

 short and obtuse. Wings divaricated in repose, the discal transverse 

 vein very distant from the hind margin, lying usually rather nearer the 

 base than the tip of the wing, the long subapical vein nearly straight 

 and parallel with the cubital. Abdomen rather conical ; in the male 

 compressed behind, with the sixth segment exserted ; the small hypo- 

 pygium partly imbedded under the tip of it, armed behind with some 

 very short spines, and beneath with a pair of oblong deflected appendages. 

 Tibia, at least the posterior ones, armed with some spines. 



The species of this genus are among the smallest of the family ; 

 the body is usually of an uniform bright metallic hue. They 

 chiefly frequent the leaves of trees, in the sunshine, and are 

 active and restless. The few species at the end, which have the 

 bristles of the thorax yellowish and the abdomen at least partly 

 yellow, seem to compose a distinct group, but from their extreme 

 tenderness they shrivel up so much when dried, that it is difficult 

 to make out the characters. 



