ULA. 211 



Bab. White Mountains, K H. ; a single female ; July, 1863. 

 I have seen an undescribed European species, which is very 

 like V. elegans, perhaps identical with it. 



2. U. paupera 0. S. $> . — Pallide f nscana, fronte cinerea, alis im- 



maculatis. 

 Pale brownish, front gray, wings immaculate. Long. corp. about 0.3. 



Syn. Ula pilosa 0. Sacken (non Schum.), Proc. Ac. Nat. Sc. Phil. 1859, 

 p. 251. 



Front and vertex grayish ; rostrum yellowish ; palpi and an- 

 tennae brown ; the two basal joints of the latter yellowish ; the 

 third joint is longer than the two first taken together, nearly 

 cylindrical ; the following joints are not much shorter than the 

 third, but gradually diminish in length towards the tip of the an- 

 tenna ; the flagellum is clothed on the under side with a delicate 

 pubescence ; the verticils are of moderate length. Thorax brown- 

 ish-yellow, the mesonotum is brownish in the middle, somewhat 

 shining, although covered with a yellowish bloom ; pleurae paler, 

 with a slight hoary bloom ; halteres pale, knob infuscatecl at the 

 tip ; feet tawny, infuscated at the tips of the femora, of the tibiae, 

 and of the tarsi ; coxae and basis of the femora paler. Abdomen 

 brownish, venter paler ; ovipositor falciform, short, ferruginous. 

 Wings with a faint brownish tinge, finely, densely, and uniformly 

 pilose over the whole surface ; stigma elliptical, but little darker 

 in color than the wing itself; a very faint brownish cloud on the 

 ■small cross-vein. 



Bab. Washington, D. C, a single female. 



In my former- publication, I had identified this specimen with 

 Ula pilosa Schum. ; I prefer to give it another name now, as 

 experience has taught me since that such an identification, based 

 upon a description and not upon an actual comparison of speci- 

 mens, is not always safe. 



I possess a male specimen from the Trenton Falls, N. Y., the 

 antennae of which have a different structure : the joints of the 

 flagellum are much shorter, elongated-elliptical, rather than cylin- 

 drical ; those of the latter part of the flagellum are longer and 

 more slender than those near its basis ; the thorax is dark brown 

 above, covered with a grayish dust ; the forceps of the male has 

 large horny appendages, yellow, brown at the tip ; the stigma is 



