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Show INSECTA. 154 All the remaining Dasygastrre have four joints at most in their maxillary palpi, and two complete cubital cells. We first remark those species in which the under part of the ab-domen is evidently furnished with a silky brush. CHELOS'l'OMA, Lat. Where the body is elongated, and almost cylindrical; the mandibles project, are narrow, arcuated, and forked or emarginated at the end; the maxillary pal pi are triarticulated( 1 ). HERIADES, Spin. Where the body is also elongated and almost cylindrical, but where the mandibles are triangular, the maxillary ·pal pi consist of but two joints, and the s~cond of the labial is much shorter than that of the others. These Insects, like the Chelostomre, make their nests in holes of old trees(2). In the four following subgenera, the abdomen is shorter and almost triangular or forms a semi-oval. These Apiaria:: are the .llbeilles mar-onnes and the .llbeilles coupeuses de feuilleB o£ Reaumur. MEGAOHILE, Lat.-.flnthophora, Xylocopa, Fa b.-Trachusa, Jur. Where the maxillary palpi consist of two joints; the abdomen is plane above and susceptible of being elevated posteriorly, thereby enabling the females to employ their sting over their body. M. murarium; Xylocopa muraria, Fab. ; Reaum., Insect., VI, ',' i vii, viii, 1-8. One of the largest species of the genus. The female is black, with violet-black wings. The male is covered with russet hairs, and the last of his abdominal annuli are black, The female constr~cts her nest of very fine earth, which she forms into a k\ud of mortar·, applying it against walls or stones, with a south exposure. It becomes extremely hard and resembles a clod of ear·th. It contains from twelve to fifteen cells, in each of whjch is deposited some bee-bread and an egg. The perfect Insect appears in the spring of the next year. Another species, closely allied to the preceding one-Apil ( 1) Lat., Ibid., 162. (2) Lat., Gener. Crust. et Insect., lV, 162. HYMF.NOPTI'~ltA, 155 Bicula, Ross.-forms its nest into branches of plants. a ball and places it on the Others, Megachiles called by Re . illes, in the construc:ion of th . aumur .llbezllea coupeuaea de feu- . 1 e1r nests employ I! ctrcu ar portions of leaves l . h ' per.ectly oval or d 'bl ' w Hc they cut out b man 1 es, with as much q · k Y means of their transported by them into tul~ nl ess as dexterity. These pieces are s t·atg lt and cylindri 1 h 1 excavated iu the fl'round d . . ca o es, previously k f o ' an sometimes m w 11 trun o an old tree Th 1' a s or the decayed I · ey me the bottom of th · eaves, and form a cell shaped I'k . e caVIty with these the honied provision o~ wh' h hl e a tht~ble, in which they deposit h lC t e larva 1s to feed d t en close the cell with a fl t l' ' an an egg; they f a or s 1ghtly c I'd o a portion of a leaf. A oncave 1 , also formed · second cell is sub 1 I! the first, that is followed by a third seque~ t y lOrmed above Of this number is the 'and so on until the hole is filled. M. rostl3; .flpis centuncularia L • R , About six lines in length· bl' k ., . eaum., Insect., VI, x. Sl II h . ' ac ' With a fulvou d na w lte and transverse s ot s-grey own; abdomen; inferior surface /th s oln the superior sides of the h . T o e atter covered . h f airs. he male is described b L' W1t ulvous unger the name of lagopoda. y mnreus as another species, ther analogous species attack the &c., for a similar purpose( 1 ). leaves of the Oak, Elm, . LITHURGtrs, Lat. 'Yhere the;e are four joints in the m . . !o~mg subgenus, but the abdomen is d axlllary palp1, as in the fol- JOmts of the labial pal . epressed superiorly. All th h p1 are placed e d e t emselves resemble long squamou t n to end(2), and the palpi m and· 1' l>l e s are narrow . b h sse re ' term·m a tm' g I· n a point Th m ot sexes d h · · e nate. d in. the middle or b1'd entated.' aTn h t r:e 1r extremity is emar . 1 gi-proJectton in the middle of their head(:>)~ ema es have a rounded . OsMu, Panz.-.llnthonhora F b T: .r ' a ·- rachusa, J u1•• Where thema xi·u ary palp1. are formed of four J.O.m ts, or at least (l) Lat., Gener c t (2) The third J. • • tr~s . et Insect.' IV, 165. to I. ts point, and wo· mh 1s usually ·m serted on the outer side f (3) Oentri8 coml\ t.h~ second forms a little oblique .and~ t thel second, anterior u a, J ab. • and an undescribed . a era stem. specJes from the Isle of F ranee. |
