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Show INSECTA. 238 . d the rostrum is pro-steriOr, an th terior are smaller than the two po ·of a proboscis, compose e longed under the pectus ·m the manner subgenus AsiNDULUM( 1 ). The subgenus GNORISTA, Meig., . d 1 m in the insertion of the ·~r from Asm u u . f h 0 ly appears to dmer . is near the extremity o t e n d' to hls figures, . t d al i which, accor Ing . This remark was commumca e p ropb o' sct. s, an d no t near tts base. p by M. Carcel(2). do we find the anterior part to Imne n o one f the following subgenera f a rostrum or proboscis. 0 • • the manner o f the head projectmg m oThe eyes are always lateral. 1 at least are longer than the re in the rna es ' Sometimes the antenn , fi t . oints thickest. There are with the two rs J . h . h thorax and setaceo. us, or 'tntermediate of whtc IS t e always three oce1 1I , th e anterior smallest. BoLITOPHILA, Hoffm. Meig. ed in a transverse line. . Where they are arrang . d '1 d description of a spectes M. Guerin has pubhshed a etsal eN t X. Its larva lives in of this subgenus ·m t h e Am • des c. a ·' the mushroom(3). MAOROOERA, Meig. Where the ocelli form a triangle( 4). les are, at most, as long Sometimes the antennre, even of the rna ' as the head and thorax. lways entire are removed . h · h the eyes are a . Some subgenera m w lC • t'b're all furnished extenor1 y from the oth ers by their four posterior 1 I ' with small spines, as in {1) Lat., Ibid.; Meig., Ibid. (2) Meig., Ib~d. (3} Meig., Ib1d. (4) Meig., Ibid. DIPTEU.A. 239 M YOETOPHILA, Meig., Where there are but two ocelli, very small and distant(t), and in LEIA, Meig. Differing from Mycetophila in their three approximated ocelli, the anterior of which is the smallest(2). SoiOPHILA., Meig. The Sciophilre have the joints of their antennre less crowded, or more distinct than those of the Leire, and they are also hairy. Besides the closed cell which extends from the base to the middle, their wings present another complete cell which is small and corresponds to the fil'st of those termed cubital.in the Hymenoptera(3). From the subgenera in which the outer margin of the tibire is destitute of spines, and where there are always three approximated ocelli, we will first separate those in which the antennre are composed of sixteen joints. Here the eyes are entire, and without. any remarkable emargination( 4). PLATYURA., Meig. To which he improperly unites the Ceraplatei. These Insects, in their wings and carriage, greatly resemble the Sciophilre; but their first cubital cell is much larger; their antennre seem to be proportionally thicker and more compressed than those of the last subgenera, and even slightly perfoliate. The abdomen of the females is widest near the end( 5). SYNA.PHA, Meig. Where the wings present but a single cubital cell closed by their (1} M:eig., Ibid. (2) Lat., Meig., Macq., and the Encyc. Method. (3) Meig., Ibid. I ~ ,.. ,.;;.,. (4) Meig., Ibid., and Macq., Dipt. du nord de Ia France. (5) Meig., Ibid. See Macq., Dipt. du nord de Ia France, Tipulairu, p. 45. |