NEUROPTERA. 269 



Snake-flies or Raphidiites. Larva with filiform antenna, 

 and corneous, masticatory mandibles ; active. Inhabits and 

 feeds on decayed wood. Pupa isomorphous. Imago with 

 monilifonn antennae ; corneous, masticatory mandibles ; 

 head large, porrected ; prothorax elongate ; wings uni- 

 formly and fully developed, recumbent, deflexed, not folded, 

 beautifully reticulated ; tarsi four-jointed; telum with a 

 seta : flight diurnal, in the sunshine. Raphidia. 



Lace-winged flies or Hemerobiites. Larva with filiform 

 antenna; mandibles and maxilla prominent, corneous; 

 sacciferous, carnivorous. Inhabits the leaves of vegetables. 

 Pupa necromorphous ; changes within the sack formed by 

 the larva. Imago with long, moniliform antenna ; mandi- 

 bles corneous, masticatory ; wings fully and equally deve- 

 loped, not folded, beautifully reticulated, deflexed ; tarsi 

 five-jointed ; smells fetid ; flies mostly in the evening. He- 

 merobius, Chrysopa, Osmylus. 



Stone-flies or Phryganiites. Larva with short antenna ; 

 mandibles corneous, masticatory ; sacciferous, aquatic. 

 Pupa necromorphous, changes in the sack formed by the 

 larva. Imago with very long, multi-articulate, filiform 

 antenna ; mandibles and maxilla obsolete ; fore wings de- 

 flexed, very hairy ; hind wings ample, much folded longi- 

 tudinally, not so hairy; tarsi five -join ted. Inhabits the 

 neighbourhood of water ; flies in the evening and during 

 the night, and is a favourite food of fish. Phryganea. 



Caddew-flies or Ephemerites. Larva with long filiform 

 antenna; mandibles corneous, masticatory; legs six, arti- 

 culate ; aquatic, carnivorous. Pupa isomorphous. Imago 

 with short concealed antenna ; mandibles and maxilla ob- 

 solete ; fore wings fully developed ; hind wings small or 

 obsolete ; all the wings beautifully reticulated, erect, and 

 meeting above the back; tarsi four-jointed; telum furnished 

 with long setiform appendages : flight in the evening, in 



