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 setse luteous; wings hyaline, hardly 

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

 of Pictet.) 



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

 millim. 



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

 ful species. 



30. P. placida ! 



Perla j)lncida Hag.! 



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

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

 rangular black spot, three ocelli ; antennas 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 seta3 luteous ; J" last ventral segment larger, ovate ; 9 

 antepenultimate one truncate ; wings pale testaceo-hyaline, costal 

 space yellowish, veins testaceous. 



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

 millim. 



Hah. New York; Washington (Osten Sacken, 185t). Very 

 similar to P. occipitalis. 



31. P. ephyre ! 



Chloroperla epht/re Newm.! Mag. Nat. Hist. 2d ser. HI, 87, 5. Pictet. 

 Perl. 283, 3. Walk.! Catal. 1G8, 91. 



Yellowish fulvous ; head broader than the prothorax, yellowish- 

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

 line, antenna; 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 ; seta) yellowish, at apex fuscous ; 9 ante- 

 ])enultimate ventral segment truncated ; wings pale testaceo-hya- 

 line, veins luteous, costal space slightly yellowish. 



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



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

 Springs, Virginia (Osten Sacken). 



