114 DIPTERA OF NORTH AMERICA. 



reticulated with dark spots and limpid drops, femora quite yellowish. 

 Long. corp. 0.33. Long. al. 0.26. 



Syn. Tetanocera flavescens Loew, Stett. Ent. Zeit. VIII, 123. — Loew, Wien. 

 Ent. Monatsch. Ill, 291. 



Pale yellowish-brown, somewhat shaded into testaceous. Face 

 white, rather considerably receding beneath. Antennae yellow ; 

 the third joint, when viewed sideways, nearly as long as the broad 

 second joint, not distinctly excised on its upper side, little pointed; 

 the antennal bristle yellowish with close, white plumation of mode- 

 rate length. Front yellow, opaque, with the excavated, polished 

 middle stripe distinctly tapering anteriorly ; on each side of the 

 orbit there is an oblong oval black spot of rather considerable size 

 and another more anteriorly, between the antennas and the anterior 

 corner of the eyes. Upper side of the thorax marked with close 

 small brown dots and besides with four rather incomplete rows of 

 small dark brown spots far distant from each other. Scutellum 

 rather convex, glossy, almost blackish-brown, a little dusted with 

 whitish near the base, and having a terminal dot formed of whitish 

 dust. Pleurae with a conspicuous, parallel, brownish-red longitu- 

 dinal stripe at the superior border, below whieh they appear paler 

 from their whitish dust. Abdomen with a dark middle line and 

 near each lateral border a broad, brown one, all of them inter- 

 rupted at the incisions ; the fourth and fifth segments bear each a 

 glossy yellowish-brown spot more distant from the border than the 

 lateral lines. Legs brownish-yellow with the tips of the tibiae and 

 the whole of the tarsi appearing darker in consequence of the 

 greater density of the black hair, whereas in reality the two last 

 joints only of the anterior and posterior tarsi are blackened ; the 

 under side of the posterior femora is beset with very numerous 

 short and many longer black bristles. Wings rather broad and 

 obtuse, with the whole surface coarsely and rather uniformly reti- 

 culated, so that there are no fascia?; some larger brown spots on 

 the costal border, but no clearer spots on the apical border ; the 

 small transverse vein is very far from the discal cell, and the pos- 

 terior transverse vein is only little curved and rather steep. 

 Hub. Carolina. (Zimmerman.) 



Observation. — When naming this species I overlooked the fact 

 that Rob'. Desvoidy already has a Tet. flavescens. Consequently I 

 should have altered the name, had I not before me a larger number 

 of specimens of Tet. arcuata proving that this species is rather vari- 



