194 BULLETIN UNITED STATES GEOLOGICAL- SURVEY. 



BlepJiarocera capitata Loew, Centiir., iv, 1863. — District of Columbia. 



Paltostoma sujperbiens Schiner, Verb, zool.-bot. Ges., 1866. — Colombia, 

 iSouth. America. 



Liponeura Mlobata Loew, Ballet. Soc. Entom. Ital., 1869. — Southern 

 Italy and islands of Greece. 



Kammatorhina bella Loew, Bull. Soc. Entom. Ital., 1869. — Ceylon. 



Bihiocepliala grandis Osten Sacken, in Dr. Hay den's Geol. Eept. for 

 1873.— Rocky Mountains. 



Hapalothrix luguhris Loew, Deutsche Ent. Mon., Berl., 1876, p. 213. — 

 Monte Eosa (Italian side). 



BlepJiarocera yosemite n. sp. 



Blepharocera yosemite is closely allied to the known species, both of 

 the genera Blepharocera and Liponeura. The differences it shows, al- 

 though important, do not necessitate the immediate formation of a new 

 genus for it, the more so as sooner or later new additions to the family 

 BlepJiaroceridcG will probably require a remodeling of the now adopted 

 genera. 



The structural characters of the species are as follows : — 



Myes pubescent, separated by a moderately broad front; upper smaller 

 portion of the eye with large, lower larger portion with small, facets. 

 Antennw lljointed, about twice as long as the head, and of equal 

 breadth, that is, not tapering toward the end ; first joint very short and 

 small, the second a little larger, the third long, cylindrical, equal to the 

 two following taken together, the fourth and following joints subcylin- 

 drical, attenuated at the base. Legs long and comparatively strong ; a 

 large and stout spur at the end of the hind tibiae; a much smaller spur 

 alongside of it; ungues with a tooth-like incrassation at the base. 

 Wings comparatively larger and broader than in Blepharocera ; anal lobe 

 very large, projecting. Venation : second submargiual cell short and 

 petiolate, the petiole being about equal in length to the interrupted vein 

 between the incomplete second and third posterior cells (in other words, 

 the third vein does not issue near the small cross- vein, but from the sec- 

 ond vein, at a distance from the small cross-vein, about equal to the 

 abbreviated vein). Between the base of the fourth posterior cell and 

 the preceding (fourth) longitudinal vein, a cross-vein exists (as it does 

 in Liponeura bilobata and in Bibiocephala). In other respects, the vena- 

 tion resembles that of Blepharocera and Liponeura. Forceps of the male 

 large, its lobes flattened, as if coriaceous (even in the living insect). 



It follows from this enumeration that in the structure of the front the 

 present species is nearer to Liponeura^ the eyes of Blepharocera being 

 subcoutiguous ; in the structure of the facets of the eyes, it is like Ble- 

 pharocera and unlike Liponeura^ where the facets are said to be of equal 

 size on both halves of the eye. From both genera it differs in the short- 

 ness of the second submargiual cell. It resembles Liponeura bilobata in 

 the presence of a cross- vein between the fourth vein and the fork be- 

 hind it, a cross-vein which is 'warning in L. cinerea and in Blepharocera. 



