10 DIPTERA OP NORTH AMERICA. [PART IV. 



gallicolae (now CecidomyidEe), noctuseformes (Psychodiclae), ros- 

 tratse (Tipulida?), fungicolee (Mycetophilidas), lugubri (genus 

 Sciara), latipennes (Smiulidaa), musceeformes (Bibionidge and 

 Rhyphichaa). The Tipidariee rostratee (our Tipulidsg) 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 ; tibias more or less spurred." The following genera 

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

 Bhipidia, Nematocera, Anisomera. The name Limonia (from 

 uipuv, meadow), as objectionable on account of a foreign idea 

 which might be connected with it, was changed in Limnobia. 

 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. Limnobia was 

 defined in the following manner : — 



" Antennae setaceous, 15— IT jointed ; first joint cylindrical, the 

 second cyathiform, 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 Tipula differs only in the statement about 

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

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



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

 Glochina, Bhamphidia, Symplecta, and Dolichopeza were added. 

 The latter' genus, however, had been originally proposed by 

 Curtis {British Entomology, II, 62) in 1825. • 



In reviewing the first steps taken in the classification of the 

 Tipididee, 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 Tipididee as a family, and the subdivision of 

 this family in longipalpi and brevipalpi are due to Latreille. 

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



Contemporaneously with Meigcn's work, "Wiedemann's Diptera 

 Exotica (1821) and Ausscreuropaeische Zweijlilgelige Insecten 



