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Show 316 INSECTA. f l b dy without any projection infe-llvthat o tle 0 ' • form colour, genera · The wings are mcumbent on · 1 val apertut·e. . riorly, and wtth a arge 0 'orly· the scutellum proJects; 1 b nd it postert ' · . the body, and exten< eyo d terminated in some by a httle · d sed short an the abdomen ts epres '. . ~ legs are almost glabrous or but point in the form of a sttlet, t e sca'rcely pilose. 1 t long as the head, and distant. In some, the antennre are a mos as CELYPHUs, Dalm. . . . 1 1 f mall other Diptera by the scutellum, which Easily distmguts le< r; the abdomen as in Scutellera. covers the whole back o 1 E t ' 1'he only species known. c. obtectus, Dalm., Ana · • n om. From Java. LAUXANIA, Lat. Fab. Meig. Where the scutellum . d' · e and the antennre have IS of an or mary stz ' a plumous seta(l). d h antennre shorter than the hea . The others ave , hort inserted beneath a sort of arch Here, they are always very s di~tant• the first cell of the peste-that traverses the !ace, an~::;:hich di~ectly follows the cubital, is rior edge of the wmgs, or . f 1 d 1 d The antennre are lodged m ossu re, an most frequbenttly e: ot~e~ is elevated. The front is ft·equently punc-the space e we • tured. . . ·h' ch the first cell of the posterior edge is almost Those species, m w 1 His Timire clo~e~, foi:m~~~c:,h:c~::::g 0 : 0 ~i~:e~e t::do~::r:~hibits _six ~n- (T;~~2~ the palette of the antennre is short and almost semt-ov~~d; nudt,l' Ulidire (Uliclia) where it is more elongated, almost eltp· an us ' fi · M Fallen tical and where the abdomen presents but ve rmgs. . W had designated this last genus by .the name of Chrysomyza. e will unite these two genera in the smgle subgenus MosiLLUS, Lat. b d Mei en The latter unites (1) Lat. Gener. Crust. et Insect., IV, 357; Fa ., an g ·. ht form a sepa· some spec1. es w'lth ~·t ' l·n which the antennll: are shorter, that mtg rate subgenus. DTPTERA. 317 I have often found numbers of theM. arcuatus on the dust of olcl walls( 1 ). Those species, in which the first cells of the posterior edge of the wings are entirely open and longitudinal, composed, in the work of Meigen, two other genera: HoMALURA, where the abdomen presents five segments, and AoTORA, where it exhibits six. The head is still more compressed than in the preceding subgenera. The seta, according to him, is naked, but I have seen it plumous in some specimens(2). There, the antennre are almost contiguous; the cells of the posterior edge of the wings are always open. Those Gymnomyzides in which the antennre are very short, and inserted, as in the last subgenus, under a sort of arch and near the middle of the face, form the genus GvMNOMYZA of Fallen(3). Those in which these organs are inserted higher up, without any distinct appearance of an arch at their origin, and that terminate in an elongated palette, compose the genus LoNOHlEA of Fallen and Meigen. According to the latter the front is narrower in the males than in the females, and we see by theit· character that these Insects are connected in some respects with various species of Anthomyzre( 4). The antennre of the Celyphi and Lauxanire are also inserted higher than in the other Gymnomyzre. Our second section of the Muscides, which will form our ninth and last sub-tribe or general division, that of the HYPOOERA, comprises but a single subgenus, very distinct from the preceding ones in several characters. The palpi are always exterior; the antennre inserted near the oral cavity are very short, and terminated by a thick and almost globular joint, with a very long seta. The wings, whose edge is densely ciliate superiorly, present near the base a stout oblique nervure, which extends to the margin where this stigma is placed in the Hymenoptera, and from this nervure proceed three othet·s which run almost parallel with each other, in a longitudinal direction; hence the origin of the name Trineu,.a, given to this subgenus by M. Meigen. The body is arcuated, the legs stout and spinous, and their thighs large and compressed, the posterior ones pa~ticularly. These Insects are extt•emely vivacious, and form in our " Genera" the genus PHonA, Lat.-Trineura, Meig. (1) See Lat., Gen. Crust. et Insect, IV, 357; Meig., and Fallen. (2) See Meigen. (3) Fallen, Dipt. ( 4) Fall. and Meigen. |