20 bulletin: museum of comparative zoology. 



the inferior appendages short and rounded (instead of triangular) ; the 

 superior appendages are about as stout as in L. intermedium, with 

 the tip sHghtly pointed and turned upward (Plate 1, fig. 14). 

 Expanse 42 mm. 



LiMNEPHILUS INTERMEDIUS, sp. nOV. 



Type.— M. C. Z. 10,071. \Yash.: Olympia. T. Kincaid. One 

 specimen. 



In general similar to L. gravidus Hagen the tibiae and tarsi banded 

 with dark. The fore wings are rather more evenly marked with 

 dark, a heavy dark band over the anastomosis; shape of wings and 

 venation as in that species, the outer margin being a little convex, and 

 the fourth apical cell in both wings being nearly as broad at base as 

 the third. The female differs from L. gravidus in the genitalia, {cf. 

 Plate 1, fig. 11, 12) the superior appendages being much broader and 

 heavier, but less acuminate than in L. vastus (Plate 1, fig. 13). 



Expanse 46 mm. 



LiMNEPHILUS FLAVASTELLUS, sp. nOV. 



Type.— M. C. Z. 10,072. British Columbia: Wellington. T. 

 Bryant and D. Jones. Two specimens. 



Yellowish, with whitish or golden hair, leg I blackish on anterior 

 side of femur and posterior side of the basal tarsal joints; the hind 

 tibiae rather brownish, spines black, a few on front tibiae near base 

 may be yellowish. Fore wings yellowish, darker yellowish brown on 

 posterior half and on outer part; a large hyaline spot beyond anas- 

 tomosis, and a curved hyaline streak abo\"e the median vein anfl curv- 

 ing back to cubitus, the brown by the hyaline streak is darker than 

 elsewhere and sharply limited, hind wings hyaline, all veins yellowish. 

 Shape of wings and venation like L. sitchensis, except that the fourth 

 apical cell in both wings is not so much narrowed at base. In the 

 male the lower appendages have a lobe near tip. Genitalia (Plate 1, 

 fig. 16, 17). 



Expanse 33 mm. 



Hesperophylax MAGNUS, sp. nov. 



Type.—M. C. Z. 10,075. Ariz.: Palmerlee, Cochise Co. C. R. 

 Biederman; Calif.: Santa Ana River, San Bernardino Mts.,30 July, 



