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Show INSECTA. 92 . tremity of the . . h oster1or ex . al i long and formed of five JOmts; ~ e p rolonged, and the ovt~ ~bd~men is almost rounded or but shg~tl! pthe interior of the ab· positor capillary and spirally convolute m domen. . Europe, on the trees · known are found ~n The two specieS They are very acuve( 1) . only, in the spring. SxREX, L.m .- Uroce1·us, Geoff., . rted near the front h antennre are wse Th Or Sirex proper, where t e ty~five joints. e man· · t to twen 1 · d consist of from thtr een . d the maxillary pa pl very an · r stde an · f h 1 t dibles are dentated on the mne. l t' d The extremity o t e as · d biarucu a e · · h d mall almost comcal, an d . to a sort of tall or orn, an s ' ·s rolonge m segment of the abdomen 1 p d of three filaments. . the. ovipositor is salient and formebl 1 rge more particularly mha· These Insects, whl· c h are tolera Y ata ino' us countries, pro d uce m· b't the Pine forests of cold and moubn &c and in certain seasons 1 • 'k h t of a Bom us, ., . fl · g a hummmg h e t a 'k the people w1th terror. ym h mbers as to strl e . b d have appeared in sue nu terior extremity of lts o y . r et and the pos . The larva has s1x 1e ' . . d where it spms a cocoon, termt. nates m. a point. It hves. m woo ' · tamorphosis. 1 R and completes tts me le-S. mariscus, L., the mae;. re~., S. giga.'l, L., the ~~.m~ Tl female is above an mch m I V Vlll lX• le d ' Insect.' I ' esp., . ' ot behind each eye; the secon rmg length and black, Wlth a sp 1 ll w The abdomen of the d the three ast, ye 0 • of the abdomen an . . th a black extremity. female is fulvous-yellowtsh ":~ f Sirex in the antennre, f J · only dwers rom . . The Tremex o urme d fil·1~orm only, conststmg · 1 d · at the en or 1' which are shorter, less ~ :n et d in the' superior wings which have of thirteen or fourteen ]Omts, an but two cubital cells(2). 45 and Encyc. Method., article (1) See Lat., Gen. Crust. et Insect., Ill, P· 2 ' Or ysse. . 238· the Monograph of t his genuS by Kliig; the (2) see Lat., lb1d., Ill, P· ' 1J, menoptera. work of Jurine and that of Panzer on the y HYMENOPTERA. 93 FAMILY II. PUP IV ORA. In the second family of the Hymenoptera we find the abdomen attached to the thorax by a simple portion of its transversal diameter, and even most frequently by a very small thread or pedicle, in such a manner that its insertion is very distinct, and that it moves on that part of the body( I). The females are provided with an ovipositor. The larvre are destitute of feet and mostly parasitical and carnivorous. I divide this family into six tribes. In the first, that of the EvANIALEs, Lat., the wings are veined, and the superior ones, at least, are lobate; the antennre filiform or setaceous, and com posed of thirteen or fourteen joints ; the mandibles dentated on the inner side ; the maxillary palpi composed of six joints, and the labials of four. The abdomen is implanted on the thorax, in several under the scutellum, and has an ovipositor usua11y salient and formed of three filaments. This tribe appears to form but the single genus F<ENUS. Sometimes the ovipositor is concealed, or but very slightly salient, and resembles a little sting. The ligula is trifid, a character which approximates these Insects to the preceding Hymenoptera. EvANIA, Fab.-Sphex, Lin. Where the antennre are geniculate, and the very small, compress- (1) The first segment of the abdomen forms the posterior extremity of the thorax, and unites intimately with the metathorax, so that the second segment of the abdomen becomes the first. |
