ZooL.-VoL. II.] WHEELER— DOLICHOPODIDM. g 



second joint broad, covering a considerable portion of the base of the 

 third joint on the inside; third joint not much longer than broad, ending in a 

 blunt but distinct point, and bearing the black arista on its dorsal surface. 

 Pubescence of arista scarcely perceptible. Postocular cilia entirely black. 

 Front, thorax, scutellum and abdomen metallic coppery green, overlaid 

 with rather thick grayish dust. There are two rows of distinct acrostichal 

 bristles and five inner dorsal bristles on either side. Scutellum without hairs, 

 bearing two large mesial and two minute lateral bristles. Abdomen slender, 

 covered with black hairs, which are rather long on the sides of the basal 

 segments. Hypopygium large, subpedunculate, inflected under the abdo- 

 men. All the appendages black, the yellow penis and its sheath slender, 

 projecting. Lamellae small, subtriangular, densely fringed with black hairs; 

 claspers large, broad and flat, with spreading truncated tips. Pleurae black, 

 thickly dusted with gray. Coxae of the same color as the pleurae, fore pair, 

 except at the base, yellow; only the tips of the middle and hind pairs yellow. 

 Anterior surfaces of fore and middle coxae with prominent black bristles. 

 Legs yellow, with black hairs. Tips of hind femora on their upper surfaces, 

 and all the tarsi from the tip of the first joint, black. All the tibiae with 

 prominent black bristles. Fore tarsi a little longer than the fore tibiae; first 

 joint as long as the second, third and fourth joints taken together. Lower 

 surface of the fore tarsi from the tip of the first joint covered with dense 

 short hairs. Middle tarsi considerably longer than the middle tibiae, with 

 joints diminishing in length successively towards the tip. Hind tibiae some- 

 what incrassated at their tips. Hind tarsi longer than the hind tibiae, first 

 joint distinctly shorter and thicker than the second and without bristles on 

 its upper surface. Wings gray, distinctly broadened towards the middle. 

 Veins black, becoming yellowish brown towards their bases. The tip of the 

 third vein is distinctly bent downwards towards the fourth. The fourth has 

 a slight angle before the middle of its distal segment and rises thence very 

 gradually to end near the tip of the third vein just before the apex of the 

 wing. Posterior cross-vein a little beyond the middle of the wing, about 

 twice its length distant from the posterior margin measured along the distal 

 segment of the fifth vein, which fades away before reaching a notch in the 

 margin. Sixth vein and anal angle of the wing well developed. Halteres 

 and tegulae yellow, the latter with prominent black cilia. 



Female. Length 4-5 mm. ; length of wing 4-5 mm. Resembles the male 

 very closely in form and coloration. Proboscis, palpi and antennae of the 

 same size as in the male; face fully twice as broad, covered with a thick layer 

 of yellowish gray dust and provided with a knot-like swelling at either end of 

 the transverse suture. The wings are distinctly narrower in the middle than 

 they are in the male. 



Many specimens of this species were taken in a salt-marsh 

 along the road from Monterey to Del Monte, Calif. The 

 species associates with Hygroceleuthus afflictus, H. con- 

 sangtiineus and Dolicho^iis cor ax O. S. 



