430 ATTEMPTED DIVISION OF BRITISH INSECTS. 



Natural Order. — Hemerobiites, Lace-winged-Jlies. 



Larva, with filiform antennae ; prominent corneous mandibles and 

 maxillae ; sacciferous, carnivorous. Inhabits the leaves of vege- 

 tables. Pupa necromorphous ; changes within the sack formed 

 by the larva. Imago, with long, moniliform antennae ; corneous, 

 masticatory mandibles, wings fully and equally developed, not 

 folded, beautifully reticulated, deflexed ; tarsi five-jointed ; smells 

 fetid ; flies mostly in the evening. Hemerobius, Chrysopa 

 Osmylus. (Myrmileon and Ascalaphus differ only in their singular 

 pit-fall making larvae and their clavated antennae). 



Stirps. — Phryganina. 



Natural Order. — Phryganites, Stone-flies. 



Larva with short antennae ; corneous, masticatory ; mandibles ; 

 sacciferous, aquatic. Pupa necromorphous, changes in the sack 

 formed by the larva. Imago, with very long, multi-articulate, 

 filiform antennae ; mandibles and maxillae obsolete ; fore-wings 

 deflexed, very hairy ; hind-wings ample, much folded longitudi- 

 nally, not so hairy ; tarsi five-jointed. Inhabits the neighbour- 

 hood of water ; flies in the evening and during the night, and is a 

 favourite food of fish. Phryganea. 



Stirps. — Ephemerina. 

 Natural Order. — Ephemerites, Caddew-flies. 

 Larva with long, filiform antennae ; corneous, masticatory mandibles ; 

 six articulate legs, and numerous lateral fins, which aid it in 

 swimming, and which also serve to separate air from the water, 

 and convey it to the trachaeae ; aquatic, carnivorous. Pupa iso- 

 morphous. Imago, with short concealed antennae ; mandibles 

 and maxillae obsolete ; 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 ; retains a superfluous skin after 

 having attained its final form, characters, and even the power 

 of flight ; this skin renders the wings opaque, when shed they 

 are more transparent. Flight in the evening, in company, rising 

 and falling ; a favourite food of fish, and a bait much in request 

 among anglers. Ephemera, Baetis, Clo'eon. 



Stirps. — Libellulina. 



Natural Order. — Libellulites, Dragon-flies. 



Larva with short antennae; corneous, masticatory mandibles ; very 

 elongate, jointed, and remarkable labium, furnished with preda- 



