BY EDWARD NEWMAN. 177 



Sp. 3. Pter. Proteus. Mas et Fem. Fusca ; caput, pro- 

 thorax et mesothorax lined lonpitudinali interrupta signata 

 sunt ; alls liyalinist fusco varlegatis ; pedibus ficscis, genuhus 

 flams: protelum subtus inerme. (Corp. long. °85 unc. ; alar, 

 dilat. 2-75 unc.) 



Of this supposed species I liave before me four specimens, 

 no two of which agree in the yellow markings on the head 

 and prothorax ; it is therefore a task of much difficulty to 

 attempt a detailed description. I must also observe, with 

 respect to considering P. Proteus as distinct from P. biloba, 

 that I do not ground the specific distinction on colour, which 

 throughout the group is remarkably instable, but on the pos- 

 session, or want of, the two unusual appendages beneath the 

 abdomen already described. Of P. Proteus I certainly pos- 

 sess both sexes, and I have besides one male, which I refer 

 to P. bibola, but as it agrees with that insect in colour only, 

 and not in the abdominal structure, I have refrained from 

 describing it. Returning to the present species, I can do 

 little more than anglicise my technical description. Brown; 

 the head, prothorax, and metathorax variously marked with 

 yellow, the markings seeming to be referrible to a longitudinal 

 line passing centrally through each of these segments ; the 

 wings are less transparent than in the preceding species, and 

 are more distinctly and deeply variegated with brown, yet the 

 markings occupy the same situations ; the legs are brown, with 

 yellow knees, and the abdomen is without the two lobes de- 

 scribed in the former species. . In conclusion 1 may add, that 

 should ulterior observations prove the necessity of uniting the 

 two species, I shall be rather gratified than otherwise by such 

 a result, as I consider the creation of imaginary species, and 

 consequent unnecessary addition to the host of names already 

 before us, extremely ill-judged. 



Inhabits North America. Taken at Trenton Falls, by Mr. 

 E. Doubleday, and presented to the Cabinet of the Entomo- 

 logical Club. 



Genus. — Pf.rla, Geoffroy. 



Perla abnormis Fusca; fere concolor; alae fuscescentes,superne 

 apicibus reticulata;. (Corp. long. '9 ; alar, dilat. 2'5.) 



Brown, with scarcely any different shade of colour ; wings deeply 

 tinged with brown, and the upper portion of the tips of both fore 

 NO. II. VOL. V. A A 



