I 



1 ENDEAVOURED to Call the attention of Naturalists to this neg- 

 lected Order ten years since, when I described and illustrated 

 the genus Leptocerus (folio 57); and the hope I expressed in 

 a memoir published in the London and Edinburgh Phil. Mag. 

 the beginning of last year, has been realised by the appearance 

 of Mons. Pictet's admirable work on the Phryganidae. His 

 divisions, formed on the structure and oeconoray of the larvae, 

 supply the most natural and unexceptionable definitions for 

 Families, and the Genera he has characterized and adopted may 

 be considered the types of them. Averse as I am to multi- 

 plying genera, I am convinced that many more are already re- 

 quired in this order, and the number and situation of the spurs 

 in the tibiae, and the neuration of the wings, will furnish admi- 

 rable distinctions for such groups : the palpi I consider the 

 best test; but without dissection and a number of specimens it 

 is frequently impossible to obtain a view of them, or to ascer- 

 tain whether these Insects possess labial palpi at all. 



The following are two of M. Pictet's analytical Tables, which 

 cannot fail to be acceptable to Entomologists. 



PHRYGANEA. 



rMaxiUary palpi of the male f forming a rounded face Sericostoma Lat. 



I spoon-shaped or clavate t clavate, with bristly scales Trichostoma Pict 



. . I |- long and hairy. Antenna? very long Mystacide Lat. ; 



spfappfii^ T (-terminal joint ■< moderately long j triarticulate in the male; wings 



of palpi ovate Landslightly hairy j with transverse nervures Phrygauea Lat, 



5-jointed in both sexes ; wings 



without transverse nervures .... Rhyacophila Pict 



setaceous. . 



I Palpi of male 

 L filiiorm 



1 



with 



terminal joint of palpi forming r inferior wings folded HydropsichePicti 



an elongated filament t inferior wings not folded Psychomia Lat. | 



Antennae filiform Hydroptila Dal. | 



LARViE 



{external respiratory organs isolated, legs moderately 

 long Phryganea. 

 resmratnrvnriransin tnfts / '''"'''^'' lPgs'o"g Mystacide. 

 respiratory organs in tntts | ^.^^^^^^ ^^^^ ^^^^.j Sericostoma. 



segments with the anterior angles produced Trichostoma. 



.case opening by a cleft Hydroptila. 



... . f pupa with a double envelope Rhyacophila. 



witnnuiacase \ pupa ^ith a simple envelope Hydropsiche. 



The remarkable insect figured in our plate is most allied to 

 Limnephilus (pi. 488.), before which it may be placed. A 

 portion of the apex of the horns has evidently been broken off 

 whilst the insect was alive, as their length is unequal, and the 

 tips are of a darker colour. I have named it after my friend 

 C. J. Paget, Esq., who took it off some rushes in a salt marsh 

 between Yarmouth and Caister, the 14th of August 1833. 



The Plant is Frankenia Iccvis (Smooth Sea- Heath). 



