OSTEN SACKEN ON WESTERN DIPTERA. _^ 195 



The antennae have one joint less than those oH Blepliaroeera (I counted 

 them on the living specimen), and although proportionally of the same 

 length, they are not subsetaceous, as in the latter genus, and have much 

 more distinctly marked joints. 



Blephaeocera yosemite n. sp., S. — Body brownish-gray; wings 

 tinged with brown, their distal third hyaline. Length 6-7™™; wing 



Body brownish ; thorax above with a grayish i^ollen, abdominal in- 

 cisures slightly whitish, more distinctly so on the sides of the venter; 

 genitals reddish ; antennae brownish, paler at base ; legs yellowish- 

 brown; the tips of the femora infuscated; wings tinged with brown, 

 this brown with a distinct bluish opalescence ; distal third of the wings 

 hyaline. 



Three male specimens caught by me on the wing, on the bridle-path to 

 the foot of the Upper Yosemite Fall, June 6, 1876, about 3 p. m. 



Family TIPULID^. 



The enumeration which I give contains some thirty-five species from 

 California, belonging to the first six sections of the TipulidWj commonly 

 united under the name of Tip. 'brevi;palpi, — a comparatively small num- 

 ber, considering that, owing to my early studies in this family, I paid 

 more attention to it perhaps than to any other. The paucity of Erio- 

 pterina was especially striking. TricJwcera, which, one would naturally 

 expect during the warm winter days of that climate, did not appear at 

 all; I found a single specimen of a rather peculiar species later in the 

 spring. 



Among these thirty-five species, seventeen are identical with species 

 from the Atlantic States, or at least so closely resembling them as to 

 be provisionally classed among the species of doubtful identity. Two 

 of that class of species are at the same time European, — Symplecta punc- 

 tipennis and Trimicra pilipes. The very common occurrence of the 

 latter all over California during winter and spring is worthy of notice. 



Most of the species peculiar to California belong to genera represented 

 in other parts of the world : — Dicranomyia (2 sp., one of which unde- 

 scribed) ; LimnoMa (2 sp.) ; Erioptera (2 sp.) ; Elliptera (1 sp.); Goniomyia 

 (1 sp., uudescribed); Limnophila (4 sp., only one described); Trichocera 

 (1 sp.); Amalopis (1 sp.); Pedicia (1 sp.); Eriocera (1 sp.). Among these, 

 the following deserve to be noticed: — 



Elliptera, a genus belonging to the remarkable and intermediate group 

 Limnobina anomala, was among the few European genera which have 

 not hitherto been discovered in North America. I found a number of 

 specimens in the Yosemite Valley, which reproduce exactly the generic 

 characters of Elliptera, although they belong to a species different from 

 the only European species hitherto described. 



Eriocera californica belongs to the Eriocerw with very long antennse 

 in the male, of which three species occur in the Atlantic States, one in 



