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Show INSECTA. 88 d' tinct joints, and . t least nine very IS Sometimes the antennre ~ave a . . . do not termm. a te suddenly In a club. the antennre, alwayR simple mt In some, and the greater number, fourteen joints at mas' both sexes, or at least m. the females, have and commonly but nine. TENTHREDO, Lat. Fab. antenn~ cons·t st of nine simple Or Tenthredo proper, where the , · oints in both sexes. wenty·two feet. l b ve from eighteen to t . 1 The larvre a . he mandib es of the perfect Insect 'fh umber of dentations lD t . . o-s also differ in the num· e n Th perior w1n 00 b varies from two to four. . e su These characters ha;e ~en f h . radial and cubttal cells. h'ch we will umte wlth ber o t etr bgenera, w 1 R ed to establish several other su d of the .!J.llantea, Doleres, . e· us 1'hey are compose f d of the thud the present one. . d f the Pristophose, orme £ D metes, &c. of Jurme, anf t~at naturalist, with some others o r family of the Pterones o Leach. F un Insect., Germ., C, \0, the T. acrophulari:e, L.; Panz., 1 a k.' antennre fulvous and some· le Five lines in length; b ac ' . r f the abdomen, the ma . tl xtremity; annu 1 o . 11 . what thickest at le e . d posteriorly W1th ye ow, second and third excepted, ;::;;l:l:s a Wasp. tibire and tarsi fulvous. It r h'te with black head and ty·two 1eet; w 1 ' The larva has twen f he Scrophularire. Points. It feeds on the leaves oi t t Germ. LXIV, 2. The T. viri d~.s , L ·; Panz· • Faun. n• sbeocd • reen; ' spots on t h e th o - same length; antennre seta~~~~s, f th: ~uperior part of the ab· rax and a band along the ml e o domen, black. On the Birch( 1 ). . t' n of a very singular spe· . us the descnp 1° ' . r De Geer has given h' h he cans Mouche·a·SC'I.e 0 cies in its form of a larva, that w 1fc the Tenthredo cerasi, L. d t which he re ers . the larve.limace, an o. . d b own feet. The larva IS It is black, with black1sh ~mgs an f v:rious fruit·trees in the extremely common on the eaves of 't form Reaumur called it gardens of F ranee. On acco. unt o. 1 s ' d 'th 1 black and covere Wl Fausse Ch emt· zz e Tetard • It ls entire Y d 't 't o be compare d t0 a glutinous humour, which has also cause 1 a Snail. . b . t has also furnished us with M. Peck, an Amer1can otams' (1) :F'or the other speci.e s, see th e a uthors J'ust quoted. HYMENOPTERA. . • 89 the complete history of another species, the larva of which is similar. Others, in which the antennce also consist of nine joints, differ from the preceding in those of the males which are pectinated on one side. CLADIUs, KIUg, Lat. ( l) Some others, with a short, thick body, like that of the Hylotomce, and considered as such by Fabricius, have from ten to fourteen joints in the antennre, which are simple in both sexes. ATHALIA, Leach(2). The following species are remarkable for their antennre, which are composed of sixteen joints at least, pectinated or flabelliform in the males, and serrated in the females. In this respect they lead us to the Megalodontes, the first subgenus of the ensuing subdivision. PTERYGOPHORus, Kli.ig. Vlhere the antennre have but a single range of teeth, and simply longer or pectinated in the males~) and short and serrated in the females; here they are evidently enlarged at the extremity(3). LoPHYRus, Lat. Where the antennre, in the males, have a double range of elongated teeth forming a large triangular panache, and are serrated in the females. To this subgenus I refer the first family of the Pterones of M. Jurine, as well as the first division of the Hylotomre of Fabricius. The larvre or pseudo·caterpillars live in society, more particularly on the Pines. They are very injurious to the young plants(4). There, the labrum is concealed or but slightly salient. The iimer side of the four posterior tibire, anterior to its extremity, presents two spiues, and frequently even a third above the preceding pair. (1) Lepel., Ibid., p. 57. (2) Lepel., Ibid., p. 21. In this genus, Dr Leach only comprises those spe. cies which are furnished with ten joints. KlUg arranges them among his Emphyti. (3) See KlUg, Leach and Lepeletier, Ibid. (4) Lepelet., Ibid., and the Monog. of thia subgenus, published by Kltig, in the Mem. N~~ot. Cur. of Berlin. VoL. IV.-M |