OCR Text |
Show INSECTA. 90 d . large, square, d he hea 1S Th antennre are always multiarticulate ' t d mandibles. They plaec ed on a little neck, and has strongl y crosse appeat· 1. 0 spr.m g. destitute of mem branous feet, The larvre of the greater numb~r are s inning, formed round the and inhabit silken nests of thetr own p leaves of van.o us trees. . h' h has been 1 z • of Junne, w lC They const.i tute t 1l e gen us Cenr ,~a eta divided into two. L Tarpa, Fab. MEGALODONTES, at.- ted or pectiniform( 1 )· Where the antennre are serro L t _ r JJida, Fa b. PAMPHILIUS, a • .LJ:J . le in both sexes. . Where those organs are strop r ct and the posteriOr . f membranous le ' f d Their larvre are destlt~te o . ted by two horns. They ee on extremity of their body lS termlbnla . der to remain concealed(2). f 1 dou e m or d b leaves, which they requent Yd. t the ovipositor is prolonge e· In the last of the Tenthre me re, . 1 The inner extremity of · postenor Y· d Yond its groove and proJects d' . tly but a single spine, curve . 'b' presents tstmc d the two anterlor tl tre The antennre are always compose and terminated by two teeth.. . of a great num ber of simple JOmts. P 'nicola Breb.-Mastigocerus, Kllig. XYELA, Dalm.- t. ' . . b their eniculate antennre forming The Xyelre are very dlstmct y g ted near their extremity, . h t are abruptly attenua II a sort of whtp, t a l. d f ,rvhich is very long; as we . f 1 . oints the t ur o . Tl and conslst o e even J ' ft ll'f rm maxillary palpl. le 1 and equally age 1 o II as by their very ong . vings is replaced by a ce , 1 'nt of the supenor ' thick or cal ou.s pol . . . or ate smooth and entire. The laminre of the ovtpo~lt . of plants or old wood(3). The larvre inhabit the mtertor . k and the Entom. Monog., Kl.u. g, P· 183 . (1) See the precedmg wor s,. p h 'l' . nd the Monograph of the genus (2) Ibid. Encyc. Method., article a7~ \.~~~a See also the Monograph of M. Lyda of Kliig, in the Mem. Nat. Cur. o e . . Lepeletier. " The number of joints is the same as tn (") See Dalm., Anal. Entom., P· ...,7. l' t . lnistaken. See nlso ,) . h' . t that natura IS 1s f the preceding Insects, and m t lS 1 es.pec ' . 1 P 'n 'cole and the Monograph o the Nouv. D.t c t · d'J-l.lst · Nat. , 2d. edlt., arttc e 't 't ' the Tenthredinita: of M. Lepeletter. HYMENOPTERA. 91 CEPHus, Lat. Fab.-Trachelus, Jur. Where the antennre are thickest near the end, and inserted near the front. According to certain observations published in the Bullet. Univers., of Baron Ferussac, the larva of the most common species-pygmreus-Iives in the interior of the stems of the wheat(l). XIPHYDRIA, Lat. Fab.-Urocerus, Jur. Where the antenn::e are inserted near the mouth, and more attenuated towards the cxtremity(2). The second tribe, that of the UROCERATA, Lat., is distinguished from the preceding one by the following characters : the mandibles are short and thick ; the ligula is entire ; the ovipositor of the females is sometimes very salient and composed of three threads, and sometimes capi1lary and spirally convoluted in the interior of the abdomen. This tribe is composed of the genus SIREX, Lin. The antenn::e are filiform or setaceous, vibratile, and formed by from ten to twenty-five joints. The head is rounded and almost globular; the labrum very small; the maxillary palpi are filiform with from two to five joints, and the labials with three, the last of which is the thickest. The body is almost cylindrical. The anterior or posterior tarsi, and in several the colour of the abdomen, differ according to the sex. The female deposits her eggs in old trees, most commonly in Pines. Her ovipositor is lodged at base between two valves, forming a groove. 0RYSsus, Lat. Fab. Where the antennre are inserted near the mouth and consist of ten or eleven joints. The mandibles are edentated, and the maxillary (1) See the work already quoted, and the Monog. of the genus SrREX of Kliig, G . .llstatua. (2) Ibid., and Jurine. Kliig designates this genus by the name of Hybonotm. • , |