32 AMERICAN NKUROPTKRA. 



Orrasby County, Nevada (Baker) ; Mesilla, New Mexico ; Williams 

 and Bright Angel, Arizona (Barber) ; Humboldt County, Los 

 Angeles County and Lake Tahoe, California, and Kaslo, British 

 Columbia (Currie). Taken from May to July. 



HemerobiiiS simplex n. sp. — Head yellowish, shiiiiug, black under 

 eyes, autenuse pale yellow; thorax pale yellow in middle, brown on sides; legs 

 pale yellowish ; abdomen brown. Wings hyaline, veins slightly marked with 

 brown dots, and brown dots around margin of wing, the gradate veinlets brown, 

 pterostigraa fairly distinct, rather reddish. Wings rather narrow, three radial 

 sectors, neither first nor second connected back to radius, but third is at or be- 

 yond first fork, costal area at base rather narrow, last gradate of inner series 

 basad of previous one, median vein bent toward cubitus so that connecting vein- 

 let is short, one-half as long as from cubitus to anal ; three branches from cubital 

 cell below. In hind wings the fork of radial sector is much before fork of me- 

 dian. Length 13-14 mm. 



Two specimens, one from Prescott, Arizona, the other from Sena 

 tor, Arizona (both Oslar;, in May and June. Separated from stig- 

 materus and moeestus by smaller size and different male genitalia. 



Heineroliiiis liumiili Linn. — Head pale yellow, a red-brown stripe 

 from each eye to mouth ; autennae yellowish ; thorax with a broad median yel- 

 low stripe and red-brown lateral stripes ; abdomen brown, legs yellowish. Wings 

 hyaline, venation pale, marked with brown, rather evenly ; the gradate series 

 are more heavily brown and have more brown on their sides ; the margin has 

 white and brown spots alternating, there is a heavy dark brown mark on the 

 veinlet connecting median and cubitus, the pterostigma is not distinct, and 

 scarcely more so in the hind wings; the apical venation, especially the cross-veins 

 in hindwiugs, is brown. Three radial sectors, the third forked twice or three 

 times before outer gradate series; costal space quite broad at base. The median 

 is bent toward the cubitus at connecting veinlet; in hindwings the first fork of 

 radial sector is plainly before the fork of median. Expanse 15-17 mm. 



Specimens from Ithaca and Sea Cliff, New York; Washington, 

 D. C, and vicinity; Sulphur Springs, Pennsylvania ; Onaga, Kan- 

 sas, and Detroit, Michigan. From May on during the summer. 

 There is, apparently, no doubt that H. castance Fitch is the Euro- 

 pean H. humuli ; and McLachlan has recorded H. humuli from 

 New York. 



Heinerobius in:irgiiiatlis Steph.— Head pale yellowish, a reddish 

 brown mark on each cheek; antennge pale yellow; pronotuni with a brown stripe 

 each side, rest of thorax pale yellowish ; abdomen pale brown ; legs pale yellow- 

 ish. Wings hyaline, venation pale, longitudinal veins barely, if at all, marked 

 with brown, gradate veinlets mostly brown, but not margined, basal veinlets also 

 brown, and those near posterior margin at base also brown and faintly clouded ; 

 some brown patches along apical margin, not very distinct. Hindwings with 



