PERLA. 19 



Blackish-fuscous ; head hardly broader than the prothorax, an 

 occipital spot and a frontal one in the shape of a V, yellow ; pro- 

 thorax quadrangular, rugulose, sides straight, a yellow stripe upon 

 the middle, angles acute ; feet yellowish-fuscous, knees blackish- 

 browh banded with yellow ; abdomen fuscous, apex beneath yel- 

 lowish ; the setae pilose, luteous ; 9 antepenultimate ventral seg- 

 ment slightly, but broadly excised ; wings hyaline, anterior ones 

 with a medial costal, hardly conspicuous, fuscous cloud ; veins 

 blackish-brown. (Female.) 



Length to tip of wings 24 millim. Alar expanse 42 millim. 



Hah. St. Martin's Falls, Albany River, Hudson's Bay (Barn- 

 ston) ; Latitude 68° (Richardson) ; Trenton Falls, and Ohio 

 (Schaum). 



I possess a 9 specimen, taken at the same place, Ohio, most 

 resembling this, but the incisure of the antepenultimate segment 

 differs a little ; being narrower and longer. Perhaps distinct. 



5. P. clio. 



Isogenics clio Newm. Mag. Nat. Hist, new ser. Ill, 86, 7. Walker Catal. 



146, 17. 

 "Fuscous, head laterally around the eyes yellowish ; prothorax 

 with a median, longitudinal, yellow line; abdomen testaceous." — 

 Walker. 

 Hah. Georgia (Abbot). 

 Unknown to me. 



6. P. drymo. 



Isogenus drymo Newm. Mag. Nat. Hist, new ser. Ill, 86, 6. Walker 

 Catal. 146, 18. 



" Fuscous, head testaceous, clypeus and a quadrate spot behind 

 it fuscous ; prothorax fuscous, marked with two large bright testa- 

 ceous spots ; base of the femora paler." — Walker. 



Hah. Georgia (Abbot). 



Unknown to me. 



7. P. aurantiaca ! 

 P. aurantiaca Hag.! 



Orange-luteous ; head with two ocelli : prothorax narrower be- 

 hind, sides straight, surface rugulose, angles acute; last ventral 

 segment short, produced in the middle ; wings subhyaline, orange- 

 yellowish, veins orange ; accessory veinlet three-branched. 



