Dec, I9I3-] MeLANDER: SyNOPSIS OF DiPTERA. 299 



joints yellow. Halteres and calypteres whitish. Wings slender, hyaline, the 

 f eins rather dark ; fourth section of the costa two thirds as long as the third 

 section ; penultimate section of the fourth vein three fourths as long as the 

 ultimate section of the fifth, and twice as long as the posterior cross-vein ; 

 basal cells distinct, anal vein represented only by a fold. 



One specimen. Woods Hole, Massachusetts, July, 1902. 



I name this species in memory of Professor Charles Otis Whit- 

 raan, whose name will ever be associated with the locality where the 

 type was found. 



Rhicnoessa milichioides new species. 



Male.— Length 2 mm. Black, densely covered with cinereous pollen ; 

 cheeks, face, except the epistome, and front testaceous. Antennae piceous ; the 

 arista scarcely longer than the third joint. Proboscis long, slender, chitinized, 

 geniculate, dark in color, the yellow slender labella as long as the middle sec- 

 tion of the clyeus ; palpi yellow, linear. Front as broad as either eye, its 

 orbits rounding so that at the antennas the eyes are one third closer together 

 than they are at the level of the front ocellus ; two rows of small frontal bris- 

 tles, the inner row with six bristles, directed inward, the outer row with four 

 reclinate bristles directed rather outward; the center of the front with four 

 pairs of cruciate bristles between which there is a shallow depression ; ocellar 

 bristles proclinate, diverging and midway between the ocelli ; postverticals 

 convergent. Face deeply excavated, short, the distance from the mouth to the 

 root of the antennae about one third the length of the front and vertex ; epis- 

 tome projecting almost tuberculate below the antennae; cheeks one third the 

 eye-height, anteriorly projecting, with a single row of marginal bristles and 

 with a single porrect vibrissa. Bristles and setulae black; four dorsocentrals, 

 acrostichal and other setulae strong, one sternopleural, two posterior and one 

 superior mesopleurals, two prothoracic, pleurae loosely setulose. Six abdominal 

 segments cinereous pruinose, the seventh segment more or less polished black 

 and rounded. Coxae, femora and tibiae concolorous with the body, the tarsi, 

 except the last joint, yellowish; bristles of front femora rather strong; middle 

 tibiae with strong terminal spur ; pulvilli large, white. Halteres whitish. Wings 

 nearly hyaline, with yellowish tinge ; the penultimate section of the fourth 

 vein slightly longer than the ultimate section of the fifth ; costa not at all 

 weakened at the humeral cross-vein, but broken just before the end of the first 

 vein ; basal cells distinct, anal vein entirely wanting. 



Three specimens, taken on the sea beach at Alki Point, Seattle, 

 Washington, August 2, 1908. 



While this species is clearly a Rliicnocssa. it bears a strong resem- 

 blance in the shape of its head to certain Milichiine genera. The nar- 

 nowed front with central depression, the numerous fronto-orbitals, 

 the short, carinate face, the lengthened proboscis and the nearly hori- 



