26 NEUROPTERA OF NORTH AMERICA. 



Length to tip of wings 11 millim. Alar expanse 20 millim. 

 Hah. Mexico. I have not seen it. Is it not P. dilaticollis ? 



24. P. similis ! 



Perla similis Hagen ! 



Fuscous varied with fulvous ; head as wide as the prothorax, fus- 

 cous, sides fulvous, antennas blackish-fuscous ; prothorax quadran- 

 gular, transverse, rugulose, fuscous, a broad fulvous stripe upon 

 the middle, sides straight, anteriorly and posteriorly somewhat 

 rounded, angles subacute ; feet fuscous ; abdomen fuscous, apex 

 above bright fulvous ; yellowish-brown below ; setae blackish-fus- 

 cous ; 9 antepenultimate ventral segment truncated ; wings smoky- 

 hyaline, costal margin obscurer, veins deep fuscous. (Female.) 



Length to tip of wings 14 millim. Alar expanse 23 millim. 



Hah. Pennsylvania and Maryland (Uhler). 



25. P. xanthenes. 



Perla xanthenes Newm. Entom. Mag. V, 178. Mag. Nat. Hist. 2d ser. 

 Ill, 35, 3. Pict. Perl. 245, 38 ; tab. xxi, fig. 3, 4. Walker, Catal. 

 159, GO. 



Body entirely pale yellow ; head hardly broader than the pro- 

 thorax, with a fuscous spot, ocelli black ; prothorax quadrangular, 

 rugulose, posteriorly a little narrower, angles subacute ; apex of 

 the femora hardly annulated with fuscous ; apex of the abdomen 

 fuscous ; wings pale yellowish, subhyaline ; veins pale yellow. 

 (Taken from the figure and description of Pictet.) (Female.) 



Length to tip of wings ? 27 millim. Expanse of wings 47 

 millim. 



Hah. Pennsylvania ; Georgia (Abbot). 



26. P. annulicauda. 



Perla annulicauda Pict. Perl. 249, 40 ; tab. xxii, fig. 1 — 4. Walk. 

 Catal. 160, 64. 



Lurid ; head as wide as the prothorax, lurid, disk obscurer, ante- 

 riorly a pale sinuated nebulous stripe, ocelli (two?) posterior ones 

 banded with black, prothorax short, rugulose, lurid, rugulae paler ; 

 sides and angles rounded ; the abdomen luteous, the setaa luteous 

 annulated with black ; the feet luteous, femora above, knees, base 

 and apex of the tibiaa and apex of the tarsi fuscous ; wings yel- 

 lowish-gray, semihyaline, apex of the costal margin obscurer, veins 

 luteous. (Taken from the figure and description of Pictet.) 



