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Show 158 INSECTA. N oMADA, Fab. maxillary palpi are The same number o f cubital cells, b u t the formed of six. joints( 1 ). -Nomada, Fab. PAsiTES, Jur. d . Th ·r maXI.1 1 ar y palpi are qua rt· complete c ubital cells. et . . But two d . s densely p1lose m articulatcd(2). l'nce in which the bo Yhl•re there are always ther Cucu 1 ' • s and w c The o llum is often spmou ' l f m the preceding Apia· l the scute movec ro f b · pate 1es, lete cu b'tal cells, are re by· the length o t etr 1 r 11 ing ones three comp . t d to the 10 ow . which almost equals . and approx.tma e . . . of the labium, nee, 1 teral dtvlstons araglossre, or a . ~hat of the labial pal pl. MELEOTA, Lat.-Crocisa, Jur. 1 . have five or s ix distinct joints(S). Where the maxillary pa pt CaocrsA, Jur. Where t h ey have but three, an d where the scutellum is prolonged and emarginated( 4). 0L£A, Kli.ig. l square, an d is not semi-oval ats Where the labrum forms a do:~ere the maxillary pal pi are wan. . ubgenera, an . . (5) in the precedmg s d to one very small JOlDt • .m g, 01. a t least reduce Ib'd t69 od ( 1) Lat., 1 ., • the Encyc. M~th ~ (2) Lat., Ibid., 170. other analogous genera, ~ee id 171. For some (3) Lapt., Ib ·t~ a.nd Philereme. articles arast. 2 , (4) Lat., lbld., 17 . ' Method., article Oxyee. . der the nameof 'd 172· Encyc. · d Serv1lle un t (5) Lat., lbl ., ' M srs Lepeletler a.n ' . . but I have no The genus describ;d ~!. si=~ of the solitary brush-footed Apl:~:~ pointed and Monreca, belongs to~ le . lVl ha.racters. The mandibles are na sec~nd and third yet been able ~o ver~~ylt::l~ is a.ppendiculated. ~acl\~f ::terminated by two b'denta.tecl. 1 he rae ra. The posteriOr b ue c~bitals receives a recurrent nervur~. . ---- IIYMENOPTEHA. 159 The last of the solitary Apiarire have the first joint of their pos. terior tarsi dilated inferiorly on the outer side, so that the following joint is inserted nearer the inner angle of the ex~remity of the pre· ceding one than to the opposite angle. The outer side of this first joint, as well as that of the tibire, is densely crowded with thick hairs forming a sort of brush or tuft, particularly in certain species foreign to Europe, and thence the term 8copulipedea, which in my Fam. Nat. du Regn. Anim., I have given to this last division of the solitary Apiarire. The under part of their abdomen is naked, or at least destitute of a silken brush. The number of cubital cells, with the exception of a few species, is three, of which each of the two last receives a recurrent uervure. Sometimes the maxillary pal pi consist of from four to six joints. In these, the mandibles exhibit one tooth at most on the inner side. They fly with a hum from flower to flower, and with great rapidity. Several males have a bundle of hairs on the first and last joint of the intermediate tarsi. Others are distinguished from their females either by their long antennre, or by a more remarkable thickening of the two thighs of the second pair of legs, or by that of · the two last. The anterior extremity of their head is frequently coloured with yellow or white. The outer side of the tibire and of the first tarsial joint of the posterior legs, in the females, is often densely pilose. They construct their nests either in the ground· or in the cracks and holes in old walls. Seve1·al prefer grounds cut perpendiculat•ly and exposed to the sun. The cells, in which they deposit their eggs, are formed of earth and shaped like a thimble, or those of the Megachiles, and extremely smooth internally. They close the opening with the same material. Those species, in which the two lateral divisions of the ligula are as long as the labial palpi and setaceous, and where the males have long autennre, form the subgenus Eucera proper. M. Spinola, under the generic name of MAonooERA, has separated from it certain spe· cies in which the max11lary pal pi have but five distinct joints, and the superior wings but two cubital cells. The MELissonEs, Lat., are American Eucerre with but four joints in their maxillary palpi. They have three cubital cells. E. longicornis; .llpia longicornia, L.; Panz., Fa,un. Insect. Germ., fascic., LXIV, 21, the male; LXXVIII, 19, and LXIV, . 16, the female. The male is black; labrum and 'anterior extremity of the head yellow; its superior portion, thorax, and sp'tnes, the inner one serrated. This subgenus approaches Macrocera and Epi· charis. |