AMERICAN DIPTEKA. 379 



Described from four males and four females, collected in the 

 Magdalena Mountains, New Mexico, by the late F. H. Snow ; and 

 from a single male from Kansas. 



This species is close to velutina, but can be distinguished by its 

 shorter costal- cilia, more broadly widened front tarsi, and by the 

 sharper basal curvature of the fourth vein in the wing. 



COMICERA Meigen. 

 1830. Meigen, Syst. Beschr., vi, 226. PI. lxiii, figs. 12, 13. 

 1864. Schiner, Fauna Austriaea, Dipt, ii, 335. 

 1835. Macquart, Hist. Nat. des Dipt, ii, 631. PI. xxiv, fig. 6. 



Third vein simple, mediastinal vein more or less obsolete. Tibiae 

 each with a single apical spur, outer side of middle and posterior 

 tibiae with two bristles near the base; pulvilli and empodia present. 

 Antenna in male long and lancet-shaped, turned upward, the arista 

 rather short, horizontal. In the female the third joint nearly round, 

 yet with a distinct point where the nasally thickened arista is inserted. 

 Frontal setae all reclinate, arranged in three rows ; an upper one with 

 four, a middle one of the same number, and a lower one of two seta?. 



Table of Species. 



1. Tip of male antenna reaching beyond the vertex, wings somewhat infuscatad, 



middle tibiae with four inacrocha?ta? besides the apical spur. 



aldrichii sp. nov. 



Tip of male antenna not or just attaining the vertex, middle tibia? with only 



three maciocha-tse besides the apical spur 2. 



2. Wings pure hyaline, tip of antenna.just reaching the vertex iitra Meig. 



Wings brownish, tip of male antenna not extending so far as the vertex. 



at rsi Meig. var . neol ropica var. nov. 



Conicera aldrichii sp. nov. (Plate ix, tig. 54.) 

 Male. Length 2.25 mm. Wholly black, nowhere shining ; third joint of 

 antenna? velvety black, produced into a very long point and reaching consider- 

 ably above the vertex, feathered on its narrow portion ; arista pubescent, 

 thickened at base and a little shorter than the third antennal joint. Palpi 

 prominent, slender, with numerous short bristles below. Thoracic dorsum 

 opaque and sparsely hlack hairy ; with a single pair of weak dorsocentral macro- 

 chffita? and a single large scutellar pair. Middle tibia? with a pair of bristles at 

 the basal third, another single one at apical third and a fourth just before the 

 apex, besides an apical spur. Posterior tibia? with a pair of bristles at basal 

 third and a single oue at apical third, besides a long apical spur. Wings slightly 

 but distinctly infuscated, costal vein reaching nearly to the middle of the wing, 

 rather more closely ciliated with moderately long bristles than in C. atra ; third 

 vein not so arcuate as in that species and less widely separated from the costal : 



TRANS. AM. ENT. SOC XXIX. DECEMBER. 1903. 



