THE CANADIAN ENTOMOLOGIST. 61 



NEW SPECIES OF HEMEROBIUS. 



BY NATHAN BANKS, EAST END, VA. 



Preparatory to a revision of the Nearctic Hemerobiidpe I present 

 descriptions of a few new species of Hemerobius. A few of the names 

 have been used already elsewhere, but without description. Outline 

 figures of the male genitalia will be given in the forthcoming revision. 



Hemcrobms tra?isversus, n. sp. — Face shining black, vertex and 

 antennae pale yellowish ; thorax pale, a black stripe across front part of 

 the mesothorax ; abdomen brownish ; legs pale yellowish. Wings with the 

 margins faintly but broadly clouded with brown ; the gradate series 

 marked with dark brown, and a brown band between the first and second 

 series. The first gradate series is from base of second fork of radial 

 sector obliquely backward ; second and third series as usual ; all nearly 

 complete. There are four sectors in one specimen and three in the other, 

 but the last is forked twice before gradate series. The median is not bent 

 toward the cubitus, so the connecting veinlets are subequal in length ; the 

 costal area is very broad at base. In hind wings the veins are all pale, 

 except a brown cross-vein closing postcostal cell ; the first fork of radial 

 sector is as far out as fork of median vein. 



Expanse, 20 mm. F^om Denver, Colorado. 



Hemerobius Nevadetisis, n. sp. — Head pale yellowish, a brown dot 

 between the antennae, the latter pale yellow, darker at tips. Thorax dark 

 brown, with a broad median yellow stripe above. Abdomen dark brown, 

 nearly black ; legs pale yellow. Wings hyaline, the veins mostly pale, 

 the radial sectors and some others dotted with brown ; around the margin 

 are brown spots alternating with whitish ; the gradate series are rather 

 heavily marked with brown, and the veinlets connecting median, cubital 

 and anal veins near base are also brown. In hind wings the venation is 

 pale, except around the margin, where it is brown. The fore wings are 

 moderately long, the costal area rather narrow at base ; the lower branch 

 of median is not bent toward the cubitus, so that the connecting veinlet 

 is as long as that connecting cubitus to anal. In hind wings the first fork 

 of the radial sector is plainly before the forking of median. 



Expanse, 16 mm. Ormsby Co., Nevada, July (Baker). 



Hemerobius dorsatus, n. sp. — Head pale yellow, cheeks brownish, 

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

 sockets marked with brown ; antennse pale, but darker at tips ; thorax 

 dark brown on sides, with a broad median stripe of yellow ; abdomen 



