318 A. L. MELANDER. 



Einpis artliritica sp. nov. (Figs. 135, 144). 

 Male and Female. Length 5 mm. — Slender, pale gray poUinose. Eyes of the 

 male separated as widely as the length of the second antennal joint, in the fe- 

 male somewhat more, facets uniformly small ; palpi small, pale yellow, with but 

 one minute subapical black hair; proboscis about twice the height of the head, 

 reddish, labella as long as the proboscis, pale yellow ; antennae slender, black, 

 about as long as the head-height, the first joint two times as long as the second, 

 the third joint nearly three times the length of the first, slender, lanceolate, not 

 sharp at the tip. arista scarcely longer than the second antennal joint ; occiput 

 black, cinereous-pollinose, its bristles small, in two transverse rows. Thorax 

 light gray pollinose, the dorsum quadrivittate with brownish, the intervittal 

 bristles very sparse and minute; one large humeral bristle present, the margi- 

 nal macrochaetae three in number; in front of the halteres two small and one 

 minute bristles, the scutellum with two central small and two outer minute bris- 

 tles; no pectal bristles, pronotal series minute; the ground color of the pectus, 

 the humeral callosities, edge of the scutellum, and two pleural spots above the 

 middle and hind coxae more or less yellowish. Abdomen shining, glabrous, ex- 

 cept for a few short submarginal bristles, yellowish ; hypopygium yellow, mod- 

 erately small, compressed, nearly vertical, nearly closed, central filament thick- 

 ened at the base, curved, exposed, except the tip, middle lamellae comparatively 

 small, convex, excised at the tip, the upper lamellae small, exposed. Legs includ- 

 ing the coxae yellow, trochanters and femora tipped with a small black spot, the 

 tarsi brownish apically ; legs slender, the hind fenio7-a reaching or su"rpassing the 

 end of the abdomen ; all the metatarsi about as long as the two following joints, 

 the front ones of the male a little longer, nearly as thick as the tibiae but not 

 appearing swollen, the tarsi spinose beneath, pulvilli minute, yellowisli ; trochan- 

 ters simple; hind knees of the male armed, the femora gradually*' but slightly 

 thickened distally, at the distal fourth on the outer inferior edge with a small 

 tubercle capped by a pencil of black bristles, beyond which is a series of five 

 scattered bristles, the inner inferior corner is explanate into a concave plate 

 which is excised proximally to a spur and carina, the tibia exceedingly thin at 

 its angular base, then suddenly swollen inwardly and produced as a strong 

 bristly process which articulates into the concavity of the femoral plate, the outer 

 edge of the abrupt tibial swelling deeply excised to receive the incurved femoral 

 spur. Halteres pale yellow. Wiiigs narrow, nearly hyaline, no stigmal darken- 

 ing, veins fine, dark fuscous, the third vein furcate slightly in advance of the 

 end of the marginal cell, its posterior branch terminating slightly beyond the 

 wing-tip ; the first section of the anterior border of the discal cell one-fourth the 

 length of the second section, the discal cell narrow ; first and second posterior 

 cells of equal width at the base; costa destitute of long bristles. 



Montgomery Co., Pennsylvania (C. W. Johnson). 



Empis podagra sp. nov. 

 Male and Female. Length 6 mm. — Black, more or less coated with cinereous 

 pollen. Eyes separated as widely as the distant posterior ocelli, facets uniform, 

 small. Palpi black, sparsely bristly toward the tip; proboscis wholly black, 

 about one and one-half times the head-height. Occipital bristles dense, in two 

 rows. Thorax wholly cinereous, marked with four brown mesonotal vittae 



