202 NEUROPTERA OF NORTH AMERICA. 



6. H. stigmaterus. 



Hemerobius stigmaterus Fitch, Report I, 93. 



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

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

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

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

 of Dr. Fitch.) 



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

 streak. 



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

 lira. 



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 niillim. 



Hob. Northern and Northwestern States, everywhere common, 

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

 other trees. 



8. H. tutatrix ! 



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; antenna 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. 



