386 ATTEMPTED DIVISION OF BRITISH INSECTS. 



decaying animal and vegetable substances. Imago with the 

 parts of the mouth variously developed ; the mandibles never 

 possessing the horizontal motion, or masticatory power ; the 

 fore wings fully developed ; the hind wings undeveloped ; 

 assuming the appearance of small pedunculated knobs, and 

 denominated hal teres or poisers ; tarsi five-jointed. 



Stirps. — Tipulina. 



Natural Order. — Cecidomiites, Hessian-fly, Sec. 



Larva elongate, inhabits and feeds on the blossoms of wheat and 

 other grain, the leaves of plants, &c. causing excrescences. 

 Pupa changes in the same situation, in a tough case. Imago 

 usually with moniliform antennae, as long as the body, composed 

 of about twelve or thirteen joints in the female, and twice as 

 many in the male ; joints nearly globular, connected by a slender 

 filament; maxillary feelers four-jointed; labium short, obtuse, 

 and tomentose : other parts of the mouth obsolete ; wings wide, 

 as long as the body, which they cover horizontally ; female fur- 

 nished with an oviduct, frequently as long as the body. Cecidomya, 

 Campylomyza. 



Natural Order. — Tipulites, Crane-flies. 



Larva stout, very soft, attenuated anteriorly, abruptly terminated 

 posteriorly ; inhabits the earth, .feeding on the roots of corn, grass, 

 and other vegetables, or occasionally decayed wood. Pupa 

 changes in the same situations ; it has often two remarkable re- 

 curved horns porrected from its head, through which it is said to 

 breathe ; and the segments of the body are mostly armed with 

 spines. Imago with antennas thirteen to seventeen-jointed ; fre- 

 quently pectinated in the males ; labium fleshy, bilobed, dilated ; 

 maxillary feelers five-jointed, moderately long, curved, the points 

 turning outwards ; the other organs of the mouth nearly obsolete ; 

 ocelli none. Ctenophora, Pedicia, Tipula, Erioptera, Limnobia. 



Natural Order. — Mycetophilites. 



Larva elongate, glabrous ; inhabits and feeds on decaying fungi. 

 Pupa changes in the same situations. Imago with antennje six- 

 teen-jointed, sometimes very long, moniliform, and simple in both 

 sexes ; labium and other organs of the mouth obscurely developed 

 or obsolete ; ocelli three ; wings rather wide, cover the body 



