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Show INSECTA. 240 . 1 hich traverses them . the mldd e, w ,. . rgin The nervure 10 f their disk and 10rms a poster1or rna • the centre o f h · 'b' 1o ng1' tu dinally ' bifurcates near . h exception o t eu· tl Ire, 1 11 W1th t e complete or closed ova ce. . t the Leire( 1 ). . these Diptera are closely allied o ginated on the inner side. There, the ey. es are ev identJy emar M yoETOBIA, Meig. . . ts and the wings pre. · t of sixteen JOlD ' ( ) Where the antennre consls . f m the base to the middle 2 • sent a 1a rge closed cell extendmg ro MoLOBRus, L a t •- Sciara, Meig. Macq_. and where the m.l d dle of the w.i ng presentIs With similar antennre, h osterior margm, and on y a cell extending f rom the base to t e P closed. by the latter(3). I 'I CAMPYLOMYZA, Wied. Meig. · r but fourteen J·O ·i n t s, at least in. .the W here the antennre cons~st o f h preceding by the wmgs, · · shed rom t e · females and also dlstmgUl f res at their internal margm which ~re hairy and destitute o nervu The eyes are entire( 4). . Our last Tipulari~ are fung1Vorous. CEROPLATEus, Bose. Fab. . d appear to consist of but one joint, Where the palpi are turne u~, 't rm and compressed(5). and are ovoid; the a~t~~nre areth:s~~ ularire, that which I call the Our last general dl VlSlOD ~f . hfch the antennre, hardly longer Floralea, is composed of specles 1D w (l) M:eig., Ibid. . (2) M:eig., and Macq. . e between this and the preceding (3) Meig and Macq. The only dtfferhenc . gs and these characters are so ., t consist in t e wm ' · f his subgenus appears to me o . ht be united. Olivier, m one o lightly defined, that the two subge~era mtg k the cerealia, has described three sfi rst :Memo.i rs on certain Insects whtch attac . of Sciarce and figured two. spectes . us (-i.) See Metgen. 262 See also Fab., Meig., gen 5) See Lat.' Gen. Crust. et Insect., IV' . Pla( tyura; Macq., an d D a1 m ., Anal · Ent om., 98. DIPTERA. 241 than the head in both sexes, are generally thick, consist of from eight to twelve joints, in the form of a perfoliate club, nearly cylin- .. drical in most of them, fusiform in some, and terminated in others by a thicker and ovoid joint. The body is short and thick. The bead of the males is almost entirely occupied by the eyes. These Insects approach the fungivorous Tipularire in the nervures of their wings and the paJpi. Such particularly are those which form the CoanYLA, Meig. Removed from all the following ones by their fusiform antennre composed of twelve joints. The eyes are round, entire, distant, and the ocelli are wanting. Their legs are long, and their tibire spinous at the extremity( I) . We wi11 now pass to subgenera in which the antennre are composed of eleven joints, forming an almost cylindrical club. The eyes of the males are always very large and approximated or contiguous. Here, as in the preceding subgenus, the head is destitute of ocelli; the eyes of the females are emarginated on the inner side in the form of a crescent. SxMtrLIUM, Lat. Meig.-Culex, Lin.-Rhagio, Fab. Where the antennre are somewhat hooked at the end, and hence the name of .fl.tractocera first given to this subgenus by Meigen. They are very small Insects, frequent low, wet woods, and annoy us by the severity of their bite. They sometimes penetrate into the genital organs of cattle and kill them. They, as well as the Culices, have been called Muaquetoes(2). There, the three ocelli are distinct. One single subgenus approaches Simulium in the lunated eyes of the females, and is distinguished from all others of this division by its very small palpi that present but one distinct joint. It is the SoATHOPsE, Geoff. Meig. Illig. One species of this subgenus, the (1) Meig., Dipt., I, 274. (2) Lat., Ibid.; Meig., and Fab. VoL. IV.-2 F |