TETANOCERA. 121 



extended at the apex to a little beyond the tip of the fourth longi- 

 tudinal vein ; there are besides grayish stripes between the longi- 

 tudinal veins ; the transverse veins are margined with dark brown- 

 ish-black ; the small transverse vein is in the middle of the discal 

 cell ; the posterior transverse vein is distinctly curved, but not in 

 the shape of an S, and has a rather steep position. 



Hal. Middle States. (Osten-Sacken.) 



Observation 1. This species is very similar to the European Tet. 

 elata Fabr., but differs by its posterior transverse vein, which, 

 although more arcuated, has a steeper position, by its antennae 

 being a little broader and the black hair of its autennal bristle 

 being much closer. 



Observation 2. From Tet. plumosa this species not only differs 

 by the form and situation of the posterior transverse vein, but 

 particularly by the considerable breadth of the polished lateral 

 stripes of the front, which in Tetanocera plumosa are exceedingly 

 narrow. 



12. T. plumosa LOEW. ^ and 9 . Seta antenna-rum nigro-plumosa ; 



alse non reticulatse, ventl transversa posteriore biflexa et valde obliqua. 



Bristle of the antennae plumose with black, wings not reticulated, with 

 the posterior transverse vein biarcuated and very oblique. Long. corp. 

 0.310.39. Long. al. 0.280.35. 



Syrf. Tetanocera vicina MACQUART, Dipt. exot. II, 3, 180, Tab. XXIV, fig. 7. 

 Tetanocera plumosa LOEW, Stett. Ent. Zeit. VIII, 201. LOEW, Wien. 



Ent. Zeit. Ill, 296. 

 Tetanocera struthio WALKER, List of Dipt. IV, 1086. 



A species of the relationship of Tet. arrogans, elata, etc. 

 Acorn-colored. Front yellow, with a small brown dot instead of 

 the ordinary lateral black spots on each orbit ; the excavated pol- 

 ished middle stripe of the front being of middle breadth, and but 

 little enlarged anteriorly; the polished lateral stripes very narrow 

 and obsolete. Antennae dark yellow ; the third joint as long as the 

 second, rather distinctly excised on its upper side ; antennal bristle 

 black with long and very close black hairs. Face rather receding, 

 yellowish with white reflection. Upper side of the thorax with the 

 lateral border broad, dusted with white and the three central longi- 

 tudinal stripes likewise covered with whitish dust and leaving be- 

 tween them two complete narrow reddish-ferruginous stripes which 

 unite on the hind border of the thorax and run over the scutellum. 



