PEllLIDES. 139 



2. EUSTHENIA ThaLI. 



Suhn'ujra ; pedes niyri, femora basi teslacea, lih'ue propc basin les- 

 taceo annulatte. 



Eustlienia Thiilia, Neion. Mij. Nat. Hist. New Series, iii. 33, 1. 

 Pleronarc-ys Tlialia, Pictet, Hist. Nat. Neur. Perl. 132, 3,. pi. ;3, f. 



0—8. 



Van Dieman's Land. 



3. El'STHENIA DIVERSIPES. 



Eusthenia diversipes, Weslw. 



Genus 3. PTERONARCYS. 



Palpi setacei. Alsc reticnlalce. Maxillae parvae. Palpi max- 

 illares mediocres, dilatati, arliculo lo brevissimo. 



Pteronarcys, Newiv.an, Entomological Magazine, x. 175. 



Maxillary palpi of moderate leng-tli ; first joint short ; second, 

 third and lourlh lon^^-r, dilated outwardly ; filth cylindrical, slightly 

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

 strongly reticulated over nearly the whole surface : ei<!;hth abdomi- 

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

 cies) wiih two projecting and recurved ungulus : tail-bristles long. 



1. Pteronarcys Proteus. 



F^isca ; caput, pr()lhora.v, mesothorax et metathorax linea covDnuni 

 longituAinali interrupta flava signata ; abdominis segmentu 

 jmstice Jiava, 7um subtus inerme ; ahc /ti/alin<e fnsvo varie- 

 gatic ; pedes fusci, genubus flaris. 



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

 Nat. 'Near. Perl. 128, 1, pi. (>, f. 1— (>. Ramb. Hist. Nat. Ins. 

 Near. 449. 



a. New York. Presented by the Knloniological Club. 

 b — e. Trenton Palls. Presented by K. Doubleday, Ks([. 

 /". District watered by the Mackenzie River. I^resented by Sir J 

 Richardson. 



