ENTOMOLOGY. 



725 



Characters of the Order. 



Wings much deflcxed, with strong ncrvcurs, hispid or 

 hairy, the lower wings plicate. Antennae inserted be- 

 tween the eyes, often very ion^, composed of an infinity 

 of joints. Feet elongate, aplQuloae. Tarsi elongate, 

 five-jointed; the last joint with two small nails. 



Larva elongate, agile, somewhat cylindric, composed 

 of twelve joints, the three first harder than the rest, and 

 each bearing a pair of feet ; the last segment with two 

 hooked processes. It inhabits tubes constructed of sand, 

 bits of wood, stone, or grass, glued together by a cement 

 impenetrable to water. 



Papa somewhat resembling the perfect insect, shut up 

 in the tube it lived in whilst a larva, but having the pow- 

 «r of motion prior to its emerging from the water (in 

 which it resides), for the purpose of changing into the 

 fly-state. 



Genus I. Phryganea. Linn. Fabr. Geoff. Latreille. 



Obs. This genus l)r Leach has divided into several 

 genera, from the proportion of the antennae and palpi. 

 We shall give as many examples as we can; but we 

 must refer to a work which he is about to publish, enti- 

 tled Tric/io/itera Systematica, for a more particular ac- 

 count, and for the characters of these genera, and of 

 others named, 1. Ceraclea, 2. Gb'cra, 3. Potomaria, 4. 

 Prosofionia, 5. Chimarra, 6. Tinodes, 7. Philofiotamus, and 

 8. JVeuronia. 



Tribe I. Leftocerides. 



Antennae much longer than the whole body. 



Genus CCCCLXXV. Leptooerus. Leach's MSS. 

 Antennae simple, not denticulated. 



Sfi. 1. Interru/itus. 



Phryganea interru/ita. Fabricius. 



Lefitocerus interru/itus. Leach's MSS. 



Inhabits Great Britain. It is found in great plenty 

 near Luss, on the banks of Loch Lomond, on the mar- 

 gins of rivulets at Ureghorn near Edinburgh, and near 

 Carlisle in northern England. It occurs during the day 

 time on the smaller branches of trees, and in the after- 

 noon flies about in great abundance, in flocks. 



GenusCCCCLXXVI. Odontocerum. Leach's MSS. 



Antennae with their inner edge denticulated. 



Sfi. 1 . Griseum. 



Odontocerum griseum. Leach's MSS. 



Inhabits Ireland and England. It is common at Dun- 

 lough Gap, near Killarny ; and near Carlisle, on the 

 banks of the Eden river. It has likewise been taken in 

 Norfolk, by Mr Scales, near Cheltenham, and near Ply- 

 mouth, by Dr Leach. 



Tribe II. Phryganides. 

 Antennae as long as the body. 



Genus CCCCLXXVII. Phryganea. Leach's MSS. 

 Anterior wings soft, villose. 

 Sfi. 1. Grandis. 



Phryganea grandis. Linn. Fabr. Latr. 

 Inhabits Europe. 



GenusCCCCLXXVIII.Limnephilus. Leach's MSS. 

 Anterior wings slightly coriaceous, nerveurs hispid or 

 hairy. 



Sfi. 1 . JRhombicus. 

 Phryganea rhombica. Linn. 

 Limncfihilus rhombicus. Leach's MSS. 

 Inhabits Europe. 



Order XIII. NEUROPTERA. 

 Order Neuroptera. Linn. Latr. Lam. Cuvier. 

 Class Odonata. Fabricius. 

 Class Synistata Fabricius. 



Wings four, naked, reticulated, and divided into a vast 

 number of areolae. 



Sect I. Subulicornes. 



Antennae subulate, very short, the last joint setiform. 

 Maxillary palpi very short. Wings extended horizon- 

 tally, or erect, very much reticulated. 



Metamorphosis semicomplete. 



Larvae and Pur.fi aquatic, somewhat resembling the 

 perfect insect. 



. Tribe I. Libeli.ui.iues. 

 Tarsi three-jointed. Mandibles strong, corneous. 

 Maxillae corneous, strong. Wings equal; or the hinder 

 ones a little larger at their base. Abdomen not termi- 

 nated with setae or filaments. Eyes very large. 



Family I. Libellulida. 



Wings horizontal. Head hemispheric, with a distinct 

 vesicle, on which the little eyes are placed in a triangle, 

 Abdomen more or less depressed. Lip with the middle 

 lamella smallest. 



Genus CCCCLXXIX. Libellula. Linn. Fabricius, 

 Latreille, Leach. 



Posterior wings alike in both sexes. 



5/!. 1. Defiressa 



Libellula defiressa. Linn. Fabr. Latr. 



Sfi. 2. Consfiurcata. 



Libellula consfiurcata. Fabr. Sowerby* 



Libellula quadrifusciata. Donovan. 



Sfi 3. Quadrimaculata. 



Libellula quadrimaculata. Linn. Fabr. Donovan. 



Sfi. 4. Canccllata. 



Libellula cancellata. Linn. Donovan. 



Inhabits Europe. Is common on the Croydon Canal, 

 near London. 



Sfi. 5. Vulgata. 



Libellula vulgata. Linn. Fabr. Donovan. 



Sfi. 6. Donovani, 



Libellula Donovani. Leach. 



Libellula biguttata. Donovan. 



Sfi. 7. Scotica. 



Libellula Scotica. Leach, Donovan. 



Genus CCCCLXXX. Cokduliv. Leach's MSS. 



Libellula. Linn. Donovan, Panzer, Latreille. 



Posterior wings in the male produced into an angle at 

 the anal edge. 



5/i. 1. jEnea. 



Libellula cenea. Linn. Donovan, Panzer, Latreille. 



Cordulia <enea. Leach's MSS. 



Family II. JEshnides. 



Wings horizontal. Head hemispheric, without a 'dis- 

 tinct vesicle for the little eyes, which are arranged in a 

 straight line. Abdomen cylindric, sometimes clavatc. 

 Lip with the middle lamella not much smaller than the 

 others. 



Genus CCCCLXXXI. Cordvlegaster. Leach's 

 MSS. 



Libellula. Linn. Donovan- 



As hn a. Latreille. 



Hinder wings of the male angulated at their anal 



