NO. 2099. THE DIPTEROUS GENUS SYMPHOROMYIA—ALDRICH. 



137 



concolorous, with black hairs except in front of the halteres, which 

 are yellowish with infuscated knob. Abdomen wholly shining black, 

 with conspicuous, woolly, reddish hair nearly to the tip, more distinct 

 on the sides; on the apical part with black hair. Front coxae with 

 black hair, and the same on the sternopleura behind it ; hairs of middle 

 coxae long and woolly, black for the most part, but somewhat pale 

 at tip; hind coxae with yellow hair; aU the tarsi infuscated from about 

 the middle of the second joint. Wings infuscated, somewhat more 

 densely across the middle, with a whitish or subhyaline streak 

 between the first and second veins, from their fork to the stigma. 

 Length 8 mm. 



Figs. 9-10.— Head of S. Plagens. 

 9, Male; 10, FEMALE. Xll- 



Female. — Head, thorax, and 

 coxae black, overlaid with yel- 

 lowish pollen; abdomen chest- 

 nut-brown; antennae, palpi, 

 femora, and tibiae yellow. 

 Front broad, with nearly par- 

 allel sides, with moderate 

 black pile, the black ground 

 color generally completely ob- 

 scured with pollen, but in 

 some specimens that are abraded there are shining spots like those 

 of Tabanus; first antennal joint opaque, not much longer than the 

 two following, with black hairs which are short above and long 

 and sparse below near the tip; second joint yellow, with a circle 

 of black hairs; third joint bright orange yellow, bare, of typical 

 kidney shape, vertical diameter nearly a half greater than that of 

 the first joint at widest; lower edge of face yellow in ground color 

 nearly to the eye; palpi deep orange, widened upward past the middle 

 and bare on this part, the hairs on basal and underside mixed yellow 

 and black, tip somewhat pointed; labeUa large and soft, the proboscis 

 projecting diagonally downward about as long as the face or slightly 

 more; occiput with black hair above, yellow behind, becoming bushy 

 below. Mesonotum densely pollinose, a slender iU-defined median 

 line blackish, pile mostly black, longer above the notopleural suture 

 and before the scutellum; pleurae with soft pale hair, the black 

 ground color showing through on lower half; metapleura with pale 

 long hair. Legs yellow almost to the tips of the tarsi, the coxae 

 and the anterior trochanters black; front and hind coxae with yellow 

 pile, middle ones with mostly black coarse hair; scutellum protub- 

 erant, concolorous with thorax, with moderate and mostly black 

 hair. Abdomen chestnut-brown, the first and second segments black 

 at the sides, and the former with long and abundant pale hair at the 

 sides; metathoracic epimera (the ridge from hind coxae joining it 

 with first abdominal segment) black; venter black at base, the rest 

 chestnut-brown; most of the abdominal pile yellow. Wings sub- 



