148 PERLIDES. 



Div. 1. 



Areola costalis vix areolis reliquis colore di versa. 



Subdiv. 1. 

 Alae aequaliter hyalinse vel opacae. 



Sect. 1. 

 Prothorax rufescens, linea marginal! nigra. Ala? flavido-fuscae. 



Subsect. 1. 

 Prothorax guttis maculisve duahus nigris. 



22. PERLA BIPUNCTATA. 



Vence fuscce, robustce. 



Perla bipunctata, Pictet, Ann. Sci. Nat. xxviii. (1833), 12, pi. 5, f. 



1214. Hist. Nat. Neur. Perl. 187, 13, pi. 1 1, 12. 

 Perla bicaudata, Newm. Mag. Nat Hist. iii. 35. 

 Perla cepbalotes, Burnt. Handb. Ent. ii. 880. 



rt, b. England. Presented by J. C. Dale, Esq. 

 c. England. 



23. PERLA PALLTDA. 



Vence flavescentes. 



Perla pallida, Guer. Icon. Regne Anim. Ins. pi. 63, f. 5. Texte, 

 393. Pictet, Hist. Nat. Neur. Perl. 192, 14, pi. 13, f. 8. 



Caucasus. 



Subsect. 2. 

 Prothorax maculis nigris nullis. 



24. PERLA IMPUNCTATA. 



Perla impunctata, Pictet, Hist. Nat. Neur. Perl. 194, 15, pi. 13, f. 9. 

 Rome. 



