150 PERLIOES. 



27. Perla abdominalis. 



Magna ; caput et prothorax nmnino nigra ; prothorax magnus, ca- 

 pitis lalitudine ; veme fuscm ; abdomen fulvum, fusco-obscu- 

 rum ; seta^ caudales a lis non occultce. 



Perla abdorainalis, Burm. Handb. Ent. ii. 881, 14. ScluEff. Icon. 

 Ins. Ratisb. p. 160, f. 2, 3. Pictet, Hist. Nat. Neur. Perl. 204, 

 18, pi. 16, f. 5 — 7. Guer. Icon. Reyne Anim. Texte, 394, 



28. Peela Barcinonensis. 



Perla Barcinonensis, Ramb. Hist. Nat. Ins. Neur. 454, 10. 

 Barcelona. 



29. Perla Madritensis. 



Perla Madritensis, Ramb. Hist. Nat. Ins. Neur. 455, 11. 

 Madrid. 



30. Perla Bcetica. 



Perla BcElica, Ramb. Hist. Nat. Ins. Neur. 455, 12. 

 Malaga. 



31. Perla capitata. 



Parva ; caput fla,vu7n., macula valde distincta nigra; thorax nigri- 

 cans ; prothorax magnus, capitis latitudine ; abdomen fulvum ^ 

 fusco-obscurum ; vencc fuscce, 



Perla capitata, Pictet, Hist. Nat. Neur. Perl. 214, 23, pi. 18, f. 4, 5. 



United States. 



32. Perla Coulonii. 



Maxima ; caput macula nigra bene determinata ; prothorax mag- 

 nus^ capitis latitudine ; abdomen fere thoracis colore ; rente 

 fuscce. 



Perla Coulonii? Pictet, Hist. Nat. Neur. Perl. 212, 22, pi. 10, f. 4. 



a, b. District watered by the Mackenzie and Slave Rivers. Pre- 

 sented by Sir J. Richardson. 



