PHYLLIUM. INSECTS. 315 



anterior margin ; antennae inserted nearer the mouth than 

 the middle of the head ; head projecting, elongated, rounded 

 posteriorly, and the eyes small ; first segment of the thorax 

 short, or scarcely longer than the second. 



Gen. PHYLLIUM, PHASMA, with elytra and wings ; BACTERIA, apterous, 

 with the antennae setaceous; BACILLA, apterous, with the antennae conical 

 and granulated. 



Gen. PHYLLIUM, Illiger, Mantis, Lin. 

 Tarsi with five joints ; elytra and wings placed horizontally on 

 the body ; body foliaceous, elongated, depressed, narrow be- 

 fore, very wide posteriorly ; head uncovered ; abdomen very 

 large, oval or elliptical, much flattened and membranous ; 

 thighs large, foliaceous, and covering the legs and tarsi when 

 these parts are folded up. 



P. siccifolia, Lat. Body much flattened, pale green or yellowish ; 

 thorax short, dentated on the margin, and dentated leaflets on 

 the thighs ; antennae filiform ; elytra short, and the wings as long 

 as the abdomen. India. Donov. Ind. Insects, No. 8, pi. 3. 

 Few insects have a form so extraordinary as this. Its general resemblance to a 



dried leaf is so deceptive that even a practised eye can scarcely distinguish it. Hence 



the popular name of the walking-leaf. 



SECTION II. 



Elytra and wings (except the first family) sloped like a roof; 

 posterior feet with the thighs very large, and proper for leap- 

 ing. 



The males of this section produce a stridulous noise or notes by rubbing their ely- 

 tra together. Almost all the females have at the anus a bivalve perforator in the 

 form of a long stylet. 



FAMILY V. GRYLLIDES. 



Elytra and wings horizontal ; antennae setaceous or filiform ; 

 tarsi with three joints. 



The insects of this family have the head projecting or vertical, almost globular, 

 very convex, and smooth posteriorly ; eyes distant, oval, or round, and two or three 

 ocelli situated between the others. The thorax is square, transverse, or very large ; 

 the elytra reticulated with large nerves, shorter than the wings ; wings prolonged in 

 the form of a tail ; and two articulated appendages at the anus. The males call 

 the females by rubbing their posterior thighs upon the elytra like the bow of a vio- 

 lin, or by rubbing the elytra together. 



Gen. GRYLLO-TALPA, TRIDACTYLUS, GRYLLUS, MYRMECOPHILUS, (Blat* 

 ta acervorum^ Panzer.) 



Gen. GEYLLUS, Lin. Lat. 



Posterior legs formed for leaping ; wings folded longitudinally, 

 and forming each in repose a prolongation beyond the elytra ; 

 antennae setaceous, with numerous joints inserted between the 

 eyes ; body thick ; thorax short, square ; elytra strongly re- 

 ticulated and semitransparent. 



G. domesticus, Lin. The Cricket. Body and elytra cinereous yellow ; 



