38 AMERICAN NEUROPTERA. 



between basal cross-veins and inner gradate series. In hindwings the first fork 

 of radial sector is as far out as fork of median vein. Expanse 22 mm. 



There are three specimens in the Fitch collection in the National 

 Museum. Have also seen it from Quebec, Canada (Fyles) ; Fran- 

 conia, New Hampshire (Slosson) ; Ithaca, New York, June 23rd, 

 and Isle Royale, Lake Superior (Hubbard) — the type is from 

 Canada. It is our largest species of the genus. 



Boriomyiar transversa Banks. — Face shining black, vertex and an- 

 tennsE pale yellowish; thorax pale, a black stripe across front of mesothorax ; 

 abdomen brownish; legs pale yellowish. Wings with margins faintly but 

 broadly clouded. Three gradate series clouded with brown, and a brown band 

 between the first and second ; first gradate series from base of second radial sec- 

 tor obliquely backward, second and third in usual positions, all nearly complete. 

 There are four sectors in one specimen, but three in the other, but the last one is 

 forked twice before the gradate series. The median vein is not bent toward the 

 cubitus, so that the connecting veinlets are subequal in length ; the costal area is 

 very broad at base. In the hindwings the veins are all pale, except a cross-vein 

 closing the post-costal cell, which is prominently brown ; the first fork of radial 

 sector is as far out as the fork of median vein. Expanse 20 mm. 



One from Colorado (probably Denver), and one from Williams, 

 Arizona, July 24th (Barber). 



Boriomyia coloradeiisis Banks. — Head pale yellowish, a brown spot 

 under each eye, and a larger one below the antennae, with branches upward 

 around the sockets; antennae pale yellowish, a brown stripe on outer side of 

 basal joint; thorax pale, brown on sides; legs pale yellowish; abdomen rather 

 dark. Wings hyaline, veins whitish, with brown dots; gradate veinlets brown, 

 slightly clouded, more distinctly on the last two of inner series; each brown dot 

 giving oflfan oblique mark each side ; brown dots around margin of wing; ptero- 

 stigma indistinct ; hindwings not marked, venation pale. Wings rather broad, 

 tip rounded ; costal area broad at base ; median not bent toward cubitus at con- 

 necting veinlet; a veinlet connecting median and first radial sector; three sec- 

 tors, upper branch of third forked again before the outer gradate series, lower 

 simple; last veinlet of inner gradate series basad of next to last; first radial sec- 

 tor not connected to second ; in hindwings the forks of radial sector and median 

 are opposite. Expanse 16-17 mm. 



Specimens from Ft. Collins, Colorado (Baker) ; Ormsby County, 

 Nevada; San Mateo County, California (Baker); and Laggan, 

 Alberta (Wickham). 



Borioinyia schwarzi Banks. — Face shining black, vertex pale yellow- 

 ish, pronotum and rest of thorax pale, a black stripe across the front of meso- 

 thorax, indistinct dark spots on mesothorax and metathorax above. Abdomen 

 brownish; legs pale yellow; wings very pale yellowish, the main veins lightly 

 spotted with black, but the margin of wing unmarked. The first gradate series 



