ZooL— Vol. II.] WHEELER— DOLICHOPODIDM. 5 



6. Hygroceleuthus consanguineus, sp. nov. 



Plate I, Figs. 5-7. 



Male. Length 5.5-6.5 mm.; length of wing 4.5-5.5 mm. Bright metallic 

 green with coppery reflections. Proboscis piceous, palpi yellow with short 

 black hairs. Face covered with thick ochreous dust, the upper two-thirds 

 somewhat olivaceous and more opaque than the lower third. In some spec- 

 imens two broad ochreous bands run lengthwise of the upper two-thirds. 

 Antennae deep black, the first and second joints yellow below and on the 

 mesial surface. First joint with abundant black hairs, and a conspicuous 

 smooth swelling on the inner side; second joint nearly as long as the first; 

 third joint scarcely broader than the second, small, with a thick pubescent 

 arista. Front bright metallic green. Postocular cilia black, not very con- 

 spicuous above but becoming very thick, flattened and blunt below. Just 

 below the middle of the orbit on either side four to six of the cilia are bright 

 orange. These are very conspicuous when the head is seen from the front. 

 Thorax cupreous on the disc, covered with gray dust anteriorly, and some- 

 times with a pair of median approximated reddish lines which fade away 

 posteriorly. Abdomen flattened dorsoventrally at its base, laterally com- 

 pressed and tapering towards the hypopygium. The median dorsal portions 

 of the segments with distinct coppery reflections. Base of the hypopygium 

 metallic green overlaid with white dust, towards the tip opaque black. 

 Lamellae piceous with black borders and cilia. Internal appendages yellow. 

 Pleurae bright metallic green with a thin layer of pale dust. Fore coxae 

 yellow with metallic green posterior surfaces; the anterior surfaces covered 

 with black hairs, long towards the tips. Anterior trochanters yellow with a 

 black spot on the posterior surfaces. Middle and hind coxae metallic green, 

 opaque with white dust. Legs plain, yellow, with the usual black bristles, 

 blackened from the tip of the first tarsal joint. The hind tibiae are slightly 

 thickened and have a smooth streak on their inner surfaces. Wings gray, 

 distinctly yellowish towards the costa, very broad, narrowed towards their 

 bases. Veins black. There is a very distinct swelling on the costa at the 

 junction of the humeral vein. The costa ends distinctly before the tip of the 

 wing with the end of the fourth vein. The third vein bends downward at its 

 end, the distal segment of the fourth has an abrupt angle with a stump-vein 

 running from it. The tip of the fifth vein fails to reach a distinct notch in 

 the hind border of the wing. Tegulae and halteres yellow, the former with 

 strong black cilia. 



Female. Length 5-6 mm. ; length of wing 5-6 mm. The broader face is 

 covered with yellow, gray or white dust; the antennae are smaller than those 

 of the male, with narrower first and second joints and less robust arista. 

 Wings of the usual shape, but with the same neuration as the male, except 

 that there is no swelling on the costa. The fore coxae have black hairs on 

 their anterior surfaces, and the teguke are ciliated as in the male. The 

 lower postocular cilia are particolored, but the individual cilia are weaker 

 and less flattened, and the orange colored cilia are more numerous and 

 extend further towards the proboscis, leaving fewer black cilia in this region 

 than there are in the male. 



