202 NEUROPTERA OF NORTH AMERICA. 



6. H. stigmaterus. 



Hemerobius stigmaterus Fitch, Report I, 93. 



Luteous ; head and antennae luteous, feet pale ; thorax and ab- 

 domen fuscous; wings hyaline, anterior ones with black veins, which 

 are banded with white; areoles fumose, with hyaline points; ptero- 

 stigma fulvous ; two gradate series, black. (From the description 

 of Dr. Fitch.) 



Var. Apex of the abdomen yellowish, or with a pale lateral 

 streak. 



Length to tip of wings 8 10 millim. Alar expanse 15 18 mil- 

 lim. 



Hob. North America, Northern and Western States ; common 

 from March to October (Asa Fitch). 



7. H. castaneae. 



Hemerobius castaneae Fitch, Report I, 94. 



Whitish ; head with a spot beneath each eye, thorax each side 

 with a stripe, and the abdomen with lateral spots, fuscous ; wings 

 hyaline, the margin a little dusky; veins whitish, interruptedly 

 black, two gradate series black; a basal larger spot, another smaller, 

 and the bases of the series of discoidal veins black. 



The color of the veins often varies ; they are sometimes either 

 black, fuscous, or with fulvous interruptions ; sometimes deep black, 

 and the discoidal spots are confluent into a vitta. (From the de- 

 scription of Dr. Fitch.) 



Length to tip of wings 10 millim. Alar expanse 18 millim. 



Hob. Northern and Northwestern States, everywhere common, 

 from April- to October (Asa Fitch). Upon chestnut, walnut, and 

 other trees. 



8. H. tut'atrix ! 



Hemerobius tutatrix Fitch, Report I, 94. 



Yellow; head each side with an external fascia beneath the eyes; 

 thorax each side with three spots, which sometimes are confluent, 

 forming a stripe, fuscous; antennae a little annulated with fuscous; 

 feet yellowish ; wings hyaline, veins whitish, interrupted with fus- 

 cous, Y-shaped clouds of a fuscous color upon the areoles, having 

 the angle on the fuscous interruptions, and the open side towards 

 the apex of the wing ; two series of transverse nervures, 7 and 6 

 gradate, black ; a black point at base. 



