10 DIPTERxV OF NORTH AMERICA. [PART IV. 



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gaUicolse (now Cecidomj'idte), noctuseformes (PsychodidaB), ros- 

 Iratse (Tipulida3), funfjlcolse (Mycetopliilida3), luguhri (genus 

 Sc'iara), latipennes (SimulidEe), muscseformes (Bibionidte and 

 Rhyphidae). The Tqndarix rostraise (our Tipulidte) were 

 defined thus : " Eyes rounded, separated by the front above ; no 

 ocelli ; head prolonged in a snout ; palpi incurved ; thorax with 

 a curved transverse suture in the middle ; abdomen with eight 

 segments; tibiae more or less spurred." The following genera 

 were added to those adopted in the " Klassification,^'' etc.: 

 Rhipidia, Nematocera, Anisomera. The name Limonia (from 

 "KtifKliv, meadow), as objectionable on account of a foreign idea 

 which might be connected M'ith it, was changed in Limnohia. 

 Hexatoma Latr., was changed in Nematocera, rather arbitrarily, 

 the only reason for this change being that Meigen himself wanted 

 to use the name Hexatoma for one of his genera. Limnohia was 

 defined in the following manner : — 



" Antenu£e setaceous, 15-17 jointed; first joint cylindrical, the 

 second cyathiforra, the following elongated or globular. 



Palpi incurved, cylindrical, four jointed ; the joints of equal 

 length. 



No ocelli. 



Wings (generally) incumbent in a parallel position to each 

 other; veins glabrous." 



The definition of Tijnda differs only in the statement about 

 the structure and the number of joints of the antennie (thirteen) ; 

 the prolonged last joint of the palpi and the divaricate wings. 



Ill the sixth volume of the same work (1830) the genera 

 Glochina, Ehamphidia, Sijmj)lecta, and Dolicliopeza were added. 

 The latter genus, however, had been originally proposed by 

 Curtis {British Entomology, II, 02) in 1825. 



In reviewing the first steps taken in the classification of the 

 Tipulidse, we cannot but notice the contrast between the talents 

 of Latreille and Meigen. The correct definition of all the large 

 subdivisions, as the separation of the Diptera nemocera, the 

 recognition of the Tijmlidse as a family, and the subdivision of 

 this family in longivalpi and hrevijmlpi are due to Latreille. 

 But the adoption of all the leading genera is the work of Meigen. 



Contemporaneously with Meigen's work, Wiedemann's Dij^tera 

 Exotica (1821) and Ausscreuropaeische ZiL-eiJiilgelige Insecten 



