32 ON THE SYNONYMY OF THE PERLITES. 



sented to one of the collections in that county, but in which 

 town I could not learn. 



As my only object at present is to rescue this interesting 

 bird from being unjustly excluded from our catalogue of vi- 

 sitors to this country, I will not enlarge upon other matters 

 connected with it, but only observe that an attentive exami- 

 nation of the specimens above referred to, will, I have no 

 doubt convince any one of the propriety of separating this 

 European species from the Ardea garetta, the great Egrett 

 or large white heron of America, a bird which has in many 

 instances been placed in our collection to represent this bird ; 

 but which is, I have no doubt a distinct species. 



Burlington Quay, Dec. 10th 1838. 



Art. VI. — On the Synonymy of the Perlites, together with brief 

 Characters of the old, and of a few new Species. By Edward 

 Newman, Esq., F.L.S. 



Class— JYEUROPTER A. Natural Order— PERU TES. 

 Family PERLIDffi. 



The family Perlidai I now use in a restricted sense, includ- 

 ing only those genera which are furnished with caudal setae : 

 Leach and Stephens incorporate with them the ecaudate Ne- 

 mourae. 



Economy. — Larva and pupa active, carnivorous, aquatic : 

 imago winged, reposes by day in the crevices of the bark of 

 trees, &c, flies by night. 



Geographical distribution. — Europe, Asia, Africa, North 

 America, New Holland, Van Dieman's Land. 



Authorities. — Linneus,Fabricius,Fourcroy, Latreille, Geof- 

 froy, Panzer, Pictet, Curtis, Stephens, Westwood, Newman. 



Genera. — Eusthenia, Pteronarcys, Perla, Isogenus, Chlo- 

 roperla, Leptoperla. 



Genus I. — Eusthenia, Westwood. 



I find this genus proposed in the English translation of 

 Cuvier's ' Regne Animal ' by Griffith and others : the follow- 

 ing quotation is all that appears on the subject. — " Mr. West- 

 wood has established this genus on account of the jaw being 

 horny, and very much dentated." As I trust Mr. Westwood 

 will give us a more detailed description on some future occa- 



