ula. 275 



stump of a vein near the basis ; the remainder of its course per- 

 fectly straight ; the small cross-vein is opposite the tip of the 

 sixth vein ; the second submarginal cell is of the same length with 

 the first posterior cell, or very nearly so ; its basis is pointed ; the 

 first submarginal cell is a little shorter than the second, its petiole 

 being as long as the great cross-vein, or a little shorter; the course 

 of the veins, bordering these cells, is almost straight; the marginal 

 cross-vein is very near the tip of the first longitudinal vein, which 

 is nearly opposite the tip of the last branch of the fourth longi- 

 tudinal vein ; the tip of the auxiliary vein is nearly opposite the 

 basis of the first submarginal cell. The discal cell is moderately 

 elongated ; narrower at the basis than towards the tip ; the 

 second and third posterior cells of nearly equal length ; the great 

 cross-vein somewhat beyond the basis of the discal cell ; fifth 

 longitudinal vein gently arcuated near the tip ; sixth and seventh 

 nearly straight. Abdomen of the male subclavate at the tip ; the 

 forceps has a pair of large horny appendages, very well perceptible 

 even in dry specimens (I have not examined it in living speci- 

 mens) ; female ovipositor rather short, arcuated, pointed, mode- 

 rately broad. 



Ula is easily distinguished from all the Amalopina by its 

 pubescent wings. The presence of only four posterior cells, the 

 shortness of the first submarginal cell in comparison to the second, 

 and the length of the antennas distinguish it from Pedicia and 

 Amalopis ; the constant presence of a discal cell, the length of the 

 prasfurca, and the number of joints of the antennas separate it 

 from Dicranota and the two genera related to it. 



Besides the two North American species described below, there 

 are two or three European ones ; the European Ula pilosa Stan, 

 is very like the North American U paupera ; and there exists an 

 undescribed European species closely resembling U. elegans. The 

 two species referred by Mr. Schiner to this genus : sororcula Zett. 

 and pilicornis Zett. {Dipt Scand. X, p. 3885 and 3888), I do 

 not know; but as Mr. Zettcrstedt distinctly mentions, in the de- 

 scription of his Limnobia pilicor.nis, that the subcostal cross-vein 

 is at the tip of the auxiliary vein (the expression: "nervus longi- 

 tudinals primus apice bifidus," in that author's terminology, 

 means nothing else), this species cannot well be Ula. It is more 

 probably an Ulomorpha. Ula has also been discovered in amber; 

 Haploneura hirtipennis Loew (Beinstein u. Bernstein fauna), 



