SCIOMYZA. 105 



stripes reaching ns far as the middle of the front, yellowish-gray. 

 Antenna? yellowish-ferruginous, usually paler at the base, with the 

 blackish-brown bristle beset with a short pubescence. Face 

 whitish. Upper side of the thorax with four brown longitudinal 

 lines, the two intermediate ones approximated and confluent with 

 their hind ends, the two lateral ones narrower and less complete. 

 Scutellum with a broad brown middle stripe. Pleura? brown, in 

 the middle with a broad longitudinal stripe pollinose with yellow- 

 ish, and a similar, but more indistinct longitudinal stripe more 

 underneath. Abdomen brownish-gray, pollinose with paler on the 

 lateral border, the posterior corners of the segments being whitish. 

 Forelegs black, with the coxa? and the last joint of the tarsi whitish, 

 and the extremity of the knees brownish-yellow. Middle and hind 

 legs brownish-yellow, with the tips and upper side of the hind 

 femora brownish black ; tips of the middle and hind tibia? black, 

 the last joints of the middle and hind tarsi brownish. The dark 

 color is sometimes more, sometimes less extended on the posterior 

 legs than is described here. Wings hyaline, slightly grayish ; the 

 costal border is margined with blackish, from the tip of the first 

 as far as the tip of the second longitudinal vein ; from the end of 

 this margin a blackish transverse band runs as far as the fourth 

 longitudinal vein ; between it and the small transverse vein there 

 are two small blackish spots ; the small transverse vein is clouded 

 with blackish ; the posterior transverse vein is a little curved and 

 marked with a larger blackish spot at its anterior end, and a smaller 

 at its posterior end, both of which but rarely coalesce so as to form 

 a complete margin. 



Hal. Middle States. (Osten-Sacken.) 



2. S. olitusa FALL. . Fusco-cinerea, antennarum seta plumata, 

 venis alarum transversis fusco-liinbatis. 



Grayish-brown, the antennal bristle plumose, the transverse veins clouded 

 with blackish-brown. Long. corp. 0.22. Long. al. 0.22. 



SYN. Sciomyza obtusa FALLEN, Sciom. 13, 4, var. a. MEIGEN, Syst. Beschr. 

 VI, 12, 6. ZETTERSTEDT, Dipt. Scand. V, 2099, 10. 



I see no difference between the single N. A. individual I possess 

 and that European species which is generally considered as the 

 true Sciomyza obtusa Fall. But to prevent misunderstandings I 

 must observe that there exists another species hitherto undescribed, 

 differing from Sciom. obtusa Fall, by its antennas having a shorter 



