28 NEUROPTERA OF NORTH AMERICA. 



fuscous ; prothorax at sides black, with a luteous medial line or 

 broader fascia ; quadrangular, sides almost straight, angles some- 

 what rounded; abdomen and setas luteous; wings hyaline, hardly 

 obscured, veins fuscous. (Taken from the figure and description 

 of Pictet.) 



Length to tip of wings 16 18 millim. Alar expanse 27 32 

 millim. 



Hob. North America. Unknown to me and a somewhat doubt- 

 ful species. 



30. P. placida ! 



Perla placida Hag.! 



Yellowish-fulvous ; the head a little broader than the prothorax, 

 luteous, in front clouded with fulvous, a large discoidal, quad- 

 rangular black spot, three ocelli ; antennae fuscous, base yellow, 

 basal article fuscous above ; prothorax rugulose, brown, posteriorly 

 a little, anteriorly somewhat rounded, sides a little oblique, ante- 

 rior angles acute ; the feet luteous, knees subfuscous ; the abdo- 

 men and sette luteous ; < last ventral segment larger, ovate ; 9 

 antepenultimate one truncate ; wings pale testaceo-hyaline, costal 

 space yellowish, veins testaceous. 



Length to tip of wings 10 12 millim. Alar expanse IT 23 

 millim. 



Hob. New York; Washington (Osten Sacken, 1857). Very 

 similar to P. occipitalis. 



31. P. ephyre ! 



Chloroperla ephyre Newm.! Mag. Nat. Hist. 2d ser. Ill, 87, 5. Pictet. 

 Perl. 283, 3. Walk.! Catal. 168, 91. 



Yellowish fulvous ; head broader than the prothorax, yellowish- 

 fulvous, ocelli three, joined together by a V-shaped brownish-black 

 line, antennae fuscous, base hardly yellow, basal articulation ob- 

 scurer ; prothorax yellowish-fulvous, rugulose, hardly narrower 

 behind, anteriorly somewhat rounded, sides almost straight, ante- 

 rior angles acute; feet yellowish, knees exteriorly a little dusky; 

 abdomen yellowish ; setae yellowish, at apex fuscous ; 9 ante- 

 penultimate ventral segment truncated ; wings pale testaceo-hya- 

 liue, veins luteous, costal space slightly yellowish. 



Length to tip of wings 15 millim. Alar expanse 25 millim. 



Hal). Georgia (Abbot) ; New York ; New Orleans ; Berkeley 

 Springs, Virginia (Osten Sacken). 



