22 NEUROPTERA OF NORTH AMERICA. 



Length to tip of wings 21 — 28 millim. Alar expanse 42 — 52 

 millim. 



Hah. New York (Trenton Falls), Is this the true P. hjcorias 

 Newm. ? 



13. P. tristis! . , 

 Perla tristis Hag.! 



Fusco-piceous ; head broader than the prothorax, fusco-piceous, 

 two points anteriorly and two upon the middle yellow ; antennae 

 piceous, base beneath and second articulation paler ; prothorax 

 quadrangular, posteriorly narrower, fusco-piceous, rugulose, shining, 

 sides a little oblique, posterior angles hardly rounded, anterior ones 

 acute ; the feet luteous, exteriorly fusco-piceous ; abdomen piceous, 

 base beneath yellow ; seta? fuscous ; ^ last ventral segment larger, 

 triangular, incurved ; ? antepenultimate segment truncated ; wings 

 smoky brownish, costal margin obscurer, veins fuscous. (Male 

 small.) 



Length to tip of wings 11 — 25 millim. Alar expanse 32 — 44 

 millim. 



Huh. Trenton Falls, New York ; Washington (Osten Sacken). 



14. p. capitata. 



Perla capitata Pict. Perl. 214, 23 ; tab. xviii, fig. 4, 5. Walker Catal. 

 150, 31. 



Fuscous ; head broader than the prothorax, luteous, the disk 

 and anterior portion black ; prothorax quadrangular, narrower 

 behind, rugulose, fuscous ; abdomen luteous, obscurer at the apex ; 

 setae luteous, apex fuscous; feet luteous, exteriorly and tarsi fus- 

 cous, knees with a black band ; wings fusco-hyaline, veins black- 

 brown. ^ (The diagnosis is from the figure and description of 

 Pictet.) 



Length to tip of wings 20 millim. Alar expanse 29 millim. 



Hah. United States. Unknown to me. 



15. P. annulipes ! 



Perla annulipes Hagen ! 



Brown varied with yellow ; head a little broader than the pro- 

 thorax, brown, occiput, two median spots and a transverse fascia 

 in front yellow ; antennse dusky, two basal articulations pale yel- 

 low ; prothorax quadrangular, narrower behind, sides oblique, 

 angles acute ; brown, rugulose upon the surface, shining, anteriorly 



