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Show 314 INSECTA. when viewed in profile, ap- • 1. d 0 that the antennre. h slightly me me ' s 1 1 with that plane or near t e Pear to be inserted almost on a e~e e retracted within the oral 1 • d the proboscis ar bd front. The pa P1 an d when at rest, and the a omen cav.tt y. The wings are tu. rne up exhibits five annuli exterlOr1 Y · 7'1 h 'fs Dictya, Fab.-Tephritis, Lat. 0RTALis, !<'all.-Scatophaga, ep rt ~ ' . ated in the females by an always bd is not termm . Where the a o~en . f of a tail or stilet, servmg as an external prolongatiOn, m the orm ovipositor(!). . . mewhat more elongated than f 1 spectes ts so The body o severa d these Diptera, in this respect, are in the following subgenus, an d the preceding ones. intermediate between the latt~r an times long and linear as in the The palette of the antennre 1S. sot:ne hort and wide as in the 0. vi- F 11 • d someumes s 0. paludum, a ·' an . D G Insect. VI, 1, 19, 20, the 'b ns Lm - e eer, ' brans-Musca V'l. ra ' · h h d red with a white streak on body of which. is black, and. ~ ~la:~ spot,may be observed at the the inner margm of each eyde, h fi t exterior nervure of their base . f h 'ngs an t e rs . extremtty o t e Wl ' • • 'th the edge, presentmg the becomes thickened where tt umtes Wl appearance of a black stigma. " the Musca cerasi, L., or the . M Fallen re1ers "" To tlus subgenus · . 1 1 on the reel and white-heart r d ore parucu ar Y one whose larva 1ee s m . t leaves the fruit and enters cherry; when abo~t to becom: \~~fsais1 completed. The perfect Inthe ground where lts metamo pwith four transverse blackish ba~ds sect is very black and glossy, . d' t'ons(<"l) on the wings united by pa·t rs ·m op postte tree 1 "' · TETANOPs, Meig. Where the abdomen of the females terminates by an a~:~::::~ jecting, tubular oviduct, resembling a tail; the h~a~ss:~~e(3). appears to be almost triangular, and as long as 1t . is arched or rather carinated in the (1) According to Melgen the hypostoma. h' . although smaller, appears . ddle whilst it is plane in Trypeta.. Butt IS carma, : 1 me ;0 exist in several species of the last genus. (2) See Meigen. . . f he Dolichocera in the pyra· (3) Idem. A subgenus approxlmatmg t~ th~se ob ~ ther characters, particu· midal form of the head, and to the Tephr1tes m t e1r 0 b larly in the abdomen which is terminated in a. truncated tu e. piPTERA. 31.5 THEPHRITis, Lat. Fab. Fall.-Trypeta, Meig.-Dacua, Fab. Where the abdomen is similarly terminated; but the head, seen from above, is rather transversal than longitudinal, and rounded. The species in which the p~lette is more elongated, fot·m the genus Dacus of Fabricius. Of this number is the one that usually attacks the Olive, which he however places among his Oscini. It is reddish, with the top of the thorax, some streaks on the back and scutellum excepted, blackish; the sides of the superior part of the abdomen are also spotted with blackish. The scutellum is salient. Coquebert has figured it in his Illust. Icon. des Insect. XXIV, 16. T. cardui; Musca cardui, L.; Reaum., Insect. III, xlv, 12- 14. Black; head and legs fulvous-brown; a zigzag brown line on the wings. The female perforates the stem of the Carduus hremorrhoidalis, in order to deposit her eggs there, and a gall· like excrescence soon forms, which serves for food and shelter to the larvre. The inhabitants of the Isle of France can scarcely obtain perfectly sound and ripe lemons, on the account of the abundance of a dipterous Insect of the same genus, which deposits its eggs in them(l). Sometimes the head is most compressed transversely, so that its superior plane is more inclined than in the preceding species, and the antennre, when "iewed in profile, appear to be inserted near the middle of the face. The proboscis is very thick and partly salient. The wings are separated horizontally, and the abdomen presents exteriorly but four segments. PLATYSTOMA, Meig.-·Dictya, Fab.(2) This last subgenus manifestly leads us to the Timite of Wiedemann, closely approximated itself to our Moaillua and Lauxania, and to some other subgenera of M. Meigen. They will close our eighth division, that of the GYMNOMYZIDEs. These Muscides are small, with a short, thick, arcuated and almost glabrous body of a glossy-black colour. Their head is strongly compressed transversely, like that of the Platystomre, is of a uni- (1) See Meigen. (2) Idem. |