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Show 234 INSECTA. TxPULA, Lat. Where the antennre are short, setaceous, and simple, but where all the joints the second one excepted, which is almost globular, are nearly cy;indrical; the first is the largest, the third elongated. T. oleracea, L.; De Geer, Insect., VI, :x.vi, 12, 13. Antennre simple; body greyish-brown and immaculate; win?s light-brown, darker on the external margin. Very common m meadows on the grass. The larva feeds on the roots of decomposed plants(!). NEPHROTOMA, Meig. Where the antennre are still simple and almost setaceous, with the first and third joints elongated and cylindrical, and the following ones arcuated; those of the males consist of eighteen, the females have but fifteen. This number is never exceeded in the pre-ceding subgenera, even in the males(2). PTYOHOPTERA, Meig. Where those organs are always simple and nearly setaceous, con· sisting of sixteen joints, the third of which is much longer than the others, and the following ones oblong. The lips of the proboscis are inclined and very long(s). In all the following subgenera the last joint of the palpi is hardly longer than the others, and presents no appearance of annular divi· sions. The wings are frequently incumbent, one on the other. Here the antennre have more than ten joints. Those, in which they arc mostly granose, of equal thickness, or hardly smaller at the extremity, and frequently furnished with whorls of hairs, according to Meigen, form various genera. {1) Lat., Ibid.; Meig., Ibid. (2) Meig., Ibid. ,u (3) See Meig., Ibid.; Lat., Gen. Cr~1st. et ~nsect., IV, 254. DIPTElU. 235 RHIPIDIA, Meig. The only Tipularire of this subdiv' . . the males are pectinated(I ). Is ton In which the antennre of ERIOPTERA, Meig. Several nervures in the wings . . Ire, but covered with hairs(2). ' as ID those of the preceding Tipu- LASIOPTERA, Mcig. vuWresh(Ser)e. the wings are a 1s o hairy, but present only two ner- LtMNoBrA, Meig. Where the wings are glabrous and the sexes( 4 ). antennre simple in both b Tdh' e P. OLY.M ERA of M • w·I e d emann-Dipt Ex t .e tstmgutshed from the Limn obi • . o . ' p. 40-appear to SISt of twenty-eight joints, instead o: frby their antennre which con- In the other subgenera th om fifteen to seventeen. .. t . , e antennre are te . JOm s eVIdently more slender and I . r.m~nated by several a most cylindrical. TRIOHOOERA, Meig. The first joints of the antennre I . . following ones more slender 1 a most bordering on an oval the The Tipule d•hiver of Doent:~d pu?escent. ' longs to this subgenus( 5). , which resembles a Culex, be- (1) Idem. (2) Idem. (3) Idem. (4. ) Idem·, hut aft er remov·m g the p d' . ( 5) See Meig., Ibid. · e tel~. |
