34 AMERICAN NEUROPTERA. 



Heinerobius hyalinatiis Fitch. — Head pale yellowish, black under 

 the eyes, brown above each side, continued back upon the thorax ; legs and 

 abdomen pale yellowish. Wings hyaline, veins hyaline, evenly dotted with 

 light brown ; cross-voinlets not darker, margin with similar brown points; hind- 

 wings hyaline, with hyaline venation ; pterostigma rather reddish in both pairs. 

 Wings short, a little more than twice as long as broad, rounded at tip; median 

 but little bent tovvard cubitus at connecting veinlet; a veinlet from median to 

 radius near origin of first sector; three sectors, upper branch of third forked, 

 lower simple; last veinlet of inner gradate series basad of next to last; in hind- 

 wings the radial sector is forked before forking of median. Expanse 12-14 mm. 



Specimens from Sherbrooke, Canada (Begin); Franconia, New 

 Hampshire ; Ithaca, New York. Fitch's specimens were from 

 central New York ; and Currie's specimen is from Kaslo, British 

 Columbia, June 17th. It prefers pine trees. All taken in May 

 and June. Since seeing a specimen in the Fitch collection in the 

 National Museum labelled "H. hyalinatus var. a," there is no doubt 

 that my. H. canadensis is the same. I liave seen the type in the 

 Hagen collection at Cambridge. It is readily known by its small 

 size and pale color. 



Hemerobius dorsatus Banks.— Head pale yellow, cheeks brownish, 

 and a short brown line from middle of face down on the clypeus; antennal sock- 

 ets marked with brown, antennae pale, but darker at tips, thorax dark brown on 

 sides, with a broad median stripe of yellow; abdomen brown ; legs pale yellow. 

 Wings hyaline, very evenly marked with brown fimbriae, veins dotted with 

 brown, the gradate series more heavily brown, outer and posterior margin alter- 

 nately brown and white. In the hindwings the venation is brownish, and the 

 pterostigma rather reddish. Fore wings modeiately long and narrow, costal area 

 quite broad at base, the lower branch of median vein is slightly bent toward the 

 cubitus, there are four radial sectors, the first three not forked till near tip, the 

 fourth twice forked before gradate series, the basal cross-vein connecting median 

 to radius euds near base of first radial sector. In the hindwings the first fork of 

 radial sector is much before forking of median vein. Expanse 17 mm. 



Specimens from Fort Collins, Colorado, August, and Veta Pass, 

 Colorado, July. 



Hemerobius cockerelli Banks.— Head pale yellowish, darker across 

 base of clypeus; antennae pale yellowish; thorax pale yellowish, with a broad 

 brown stripe each side, not as plain behind as on prothorax; abdomen pale at 

 base, dark beyond ; legs pale. Wings pale brown, with many white spots 

 throughout the middle region, on the margin similar spots on the veins, a darker 

 brown band across both series of gradate veins, and a large spot at the connec- 

 tion between cubitus and median; margin of wing with a brown dot at end of 

 each vein, and one between the ends, no white spots on margin ; hindwings 

 nearly hyaline, veins brownish, margin dotted as in forewings. Wings rather 



