& 
458 CLASS VIII. 
Xya Iiuia. (Tridactylus Outy., LAtR.) Anterior feet fossorial. 
Antenne short, filiform, with ten joints. Ocelli three. Posterior 
feet elongate, saltatory, terminated by lamelle in place of tarsi. 
Xya Itc. Posterior tibie furnished with lamelle elongate, 
lanceolate, depressed. 
Sp. Xya fossor BurM., Tridactylus paradoxus LatrR. ; DuMER. Cons. gén. 8.1. 
Ins. Pl. 25, fig. 8; Gurr, Iconogr. Ins. Pl. 54, fig. 5. Hab. in Africa. 
Xya variegata Iuuie., Burm., Cuvier, R. Ani. éd. ill., Ins. Pl. 81, fig. 2. 
Hab. in south of France and in Spain. Léon Durour is of opinion that 
it belongs to the Acridii ; comp. his Recherches sur l Hist. nat. du Tridac- 
tyle panaché, Ann. des Sc. nat. 2e Série, Tom. Ix. 1838, pp. 321I—334. 
Sub-genus: Rhipipteryx NewMan, BRuuusé (species of Xya Burm., 
Rhipidopteryx). Posterior tibiee destitute of lanceolate lamelle. 
Section II. Cursoria. Feet ambulatory alone. Wings and 
elytra horizontal, incumbent. (Musical organ present in none.) 
Family XLI. Mantides nob. (genus Mantis L.) Tarsi with 
five jomts. Head not covered by thorax. 
Phalanx I. Spectra (Phasmida Leacn. Phasmodea BuRM.). 
Fore-feet similar to the rest, not raptorial, very near the head, 
remote from the intermediate pair. Antenne mostly setaceous, 
long, in a few short, filiform. Labrum deeply bifid. Mandibles 
thick, strong; maxille hard at the apex, subdenticulate; galea 
plane, broad. Labium quadrifid, with laciniz unequal, the external 
very long, plane, hatchet-shaped. Elytra almost always short, 
wings large; sometimes wings and elytra none. 
Phasma Licutenst., Fase. (Spectrum STot). 
These insects are in great part confined to tropical countries ; 
many also are found in New Holland. They live on vegetable food. 
Some wingless species have the form of dried twigs, and others, 
which are flat, with membranous and vein shield-covers, have a great 
resemblance to leaves (the genus Phylliwm.) Of some species the 
males are much smaller than the females; the former have often 
three simple eyes, which in the last are absent. In this division 
the largest species of insects are found. 
Comp. A. A. H. Licurrnstein, Dissert. on two nat. genera hitherto con- 
founded under the name of Mantis ; Trans. of the Linnean Soe. vi. 1802 ; 
TOUSSAINT VON CHARPENTIERS Bemerkungen zu LICHTENSTEIN’S ADA, 
