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Show 310 INSECTA. sent to me from Germany, and marked Piophila vulgaris( l) is ~n the same case as the first, but does not appear to me to be suffi. ciently removed from the Oscini(2)· The fifth division, that of the DoLIOHOOERA, and which embraces the genus called Tetanocera by M. Dumeril, closely approaches the fourth; but the length of the second joint of the antennre which is here equal to that of the third, or the palette, and most frequently surpasses it, serves to distinguish them. These organs, always distant and projecting, are, with but few exceptions, as long as the head or longer, and terminated in a point. The superior plane of the head forms an obtuse triangle, or one truncated at the apex. The face is smooth or but slightly silky. In some the antennre are shorter than the bead. OTITES, Lat. Where the seta of the antennre is simple and tbe inferior extremity of the bead, or its oral portion, does not project(3). EuTHYOERA, Lat. Where the second joint of the antennre is larger than the follow· ing one, almost square, and the latter is triangular and pointed, with ( 1) The P. scutellaris of Fullen and Meigen. The face is but very slig\ltly silky. The top of the head and thorax is pilose in the Heleomyza:, a subgenus that is easily confounded with the preceding one. In Oscinis or Piophila and Chlo· rops, the summit of the head, as we have already stated, presents posteriorly a triangular space, sometimes even slightly prominent, and usually. brown and glossy, on which the ocelli are situated. The antenna: are always distant, and the seta is simple. The body alone is pubescent. The legs are proportionally more robust than those of the Heleomyza:, and it is evident that these Insects approach the Tetanocera. Messrs Fallen and Meigen have not sufficiently compared the characters of the genera they have establis~1ed, nor endeavoured to approximate them in a natural series, which makes it a difficult matter to discern the difference between several of them. I have frequently been embarrassed with genera, from which I could have been relieved by the work of the latter, but it is not yet pub· lished. (2) See the Nouv. Diet. d'Hist. Nat. 2d edit., article Oscine, divis. II, and Lat., Gener. Crust. et Insect., IV., 361; Oscinislineata, and the following species. See also with respect to Piophila, Fallen, Meigen, and Wiedemann-Analect. Entom. (3) Lat., Hist. Nat. des Crust. et des lnsect.;-the second edition of the Nouv. Diet. d'Hist. Nat., al'ticle Oscine, divis. I; and Lat., Gener. Crust. et Insect., IV, 351; to this subgenus I also refer the Oscinis umllraculata1 Fnb . .I DIPTERA. 311 a plumous seta. The inferior extremit of th . . manner of a truncated snout( I). y e head proJects In the lonTgheer. an·t ennre of the others are m~nifest-ly as long as the head or SEPEDoN, Lat.-Baccha' F a b• yY"here ·the antennre at·e considerabl I the second joint much Ionge r th an t l1 e lya sot nagnedr thJa"n dt h•e head, with ter forms an elongated . t d . cy m neal; the Iatsetre( 2). ' pom e triangle furnished with simple TETANOOERA ' D urn. L at.-8catopltaga, Fab. Where the antennre are as lo~ t . with their second joint com . gdas ~ he _head, or a little longer ptesse , 10rmmg a 1 ' square, a!i long as the third 1 . ong and narrow • • . 1 ' or on Y a httle Ion . h · IS stml ar to that of the pre d" get; t e thu·d joint times plumous(3). ce mg subgenus, but the seta is some· The sixth division, that of th~ L the length and tenuity of the 1 EPTOPODITEs, is remarkable for the length of the body whiche?s, lthe two last being at least twice fi ' Is a so slender a d fir~ rst are distant from the others· all . n 1 orm; the two is spherical or ellipsoidal and t ' . the :arst are short. The head or surpasses its transver~e d" ermmates m a point; its length equals . tameter. The te · . men ts pointed in the fern a Ie s, an d clavate i rmthm atlon of the abdo-tennre are very small and a . n e males. The an· r ' re msertecl on the f t T are ,ound on plants, and several f ro~ . hese Muscides requent aquatic localities. In the MtoROPEZA, Meig. . W~ich I formerly distinguished b ls elhpsoidal and terminate . ~ the name of Calobatea, the head . s ln a pomt· the 1 .. semt·orbicular, and the seta s't mp 1 ' ast JOint of the an tenore t!. The sp ace w h"t ch separates the (1) Scatophaga chmropkylli, Fab.· and so . . (2) Lat., Gener. Crust. et Insec;. IV 34me specles of Tetanocera. . (3) Lat. , Ge ner. Crust. et Insect 1 IV1 " 9. . mmed. Some of the sp ec1· es may be., t•ef, ' "4d9 · This subgenus should b e re-exa. a~l~ others will form separate sub ener:rre to Sepedon-S. rufa, ru.flpea, Fab.cmls and Dryomyza. g . Some of them are connected with Os· |
