PERLIDES. 139 



2. EUSTHENIA THALIA. 



Subnigra ; pedes nigri, femora basi testacea, tibiae prope basin tes- 

 taceo annulatce. 



Eusthenia Thalia, Newm. Mag. Nat. Hist. New Series, iii. 33, 1. 

 Pteronarcys Thalia, Pictet, Hist. Nat. Neur. Perl. 132, 3, pi. 5, f. 

 68. 



Van Dieman's Land. 



3. EUSTHENIA DIVERSIPES. 

 Eusthenia diversipes, Westw. 



Genus 3. PTERONARCYS. 



Palpi setacei. Alae reticulatae. Maxillae parvae. Palpi max- 

 illares mediocres, dilatati, articulo lo brevissimo. 



Pteronarcys, Newman, Entomological Magazine, v. 175. 



Maxillary palpi of moderate length ; first joint short; second, 

 third and fourth longer, dilated outwardly ; fifth cylindrical, slightly 

 recurved : mandibles and maxillae hidden, very small : wings large, 

 strongly reticulated over nearly the whole surface : eighth abdomi- 

 nal segment furnished beneath in the female (at least of some spe- 

 cies) with two projecting and recurved ungulae : tail-bristles long. 



1. PTERONARCYS PROTEUS. 



FuAca ; caput, prothorax, mesothorax et metathorax linea commuui 

 longitudinali interrupts flava signata ; abdominis segmenta 

 postice flava, 7um subtus inerme ; alee hyalince fusco varie- 

 gatce ; pedes fusci,genubus flavis. 



Pteronarcys Proteus, Newm. Ent. Mag. v. 177, 3. Pictet, Hist. 

 Nat. Neur. Perl. 128, l t pi. 6, f. 16. Ramb. Hist. Nat. Ins. 

 Neur. 449. 



a. New York. Presented by the Entomological Club. 

 b e. Trenton Falls. Presented by E. Doubleday, Esq. 

 /. District watered by the Mackenzie River. Presented by Sir J. 

 Richardson. 



