NO. 1777. ON JAPANESE 8AWFLIES—R0HWER. Ill 



Genus TAXONUS Hartig. 



=Amefastegia A. Costa, 1882. 

 Type. — (Tenthredo coxalis Klug) = Tenthredo equiseti Fallen. 

 F. W. Konow * says, in speaking of Hartig's genus Taxonus, 

 "Deswegen muss der T. agrorum Typus seiner Gattung bleiben." 



0. Costa'' in 1859 made Ermilia indchella O. Costa as the type of 

 Ermilia O. Costa. A. Costa " places Ermilia jndchella O. Costa as a 

 synonym of Tenthredo agrorum Fallen, thus making the species 

 agrorum Fallen the type of Ermilia. This removal of Tenthredo 

 agrorum from the genus Taxonus in 1894 makes it impossible to select 

 it as the type of the genus Taxonus in 1896; therefore some other type 

 must be chosen for Taxonus than the one chosen by Konow. Dr. 

 A. D. MacGillivray '^ fixes Tenthredo equiseti Fallen as the type of 

 Taxonus which has Tenthredo coxalis Klug as a synonym, a species 

 which was originally included. 



The genus Taxonus may be divided into a number of subgenera, 

 some of which are now recognized as good genera. The following 

 may be separated thus: 



Malar space present, although not very large; pedicellum longer than wide; post- 

 basitarsis subequal in length with the following joints; tarsal claws cleft, or with an 

 inner tooth 1. 



1. Clypeus deeply emarginate; claws deeply cleft, the inner tooth shorter than the 



outer; pleurte rather roughly sculptured; anal cell of hind wings petiolate; 

 transverse median vein of fore wings in middle of cell; postnotum of metathorax 



as in Taxonus subg. Ermilia 0. Costa. 



Clypeus truncate or nearly; pleurae not coarsely sculptured 2. 



2. Postnotum of the metathorax without a well-defined, broadly triangular shaped 



production; anal cell of the hind wings sessile; transverse median vein of the 

 fore wings received near the middle of the cell; hind wings of the male without a 

 surrounding marginal vein; tarsal claws with an inner tooth; rather slender 



species subg. Taxonus Hartig. 



Postnotum of the metathorax with a well-defined, broadly triangular-shaped lobe, 

 as the scutellum of the mesothorax; anal cell of the hind wings petiolate; trans- 

 verse median vein of the fore wings received distinctly basad of the middle of 

 the cell; males unknown; tarsal claws cleft at the apex; larger and stouter 

 species. 



subg. Nesotaxonus Rohwer. 



NESOTAXONUS, new subgenus. 



e 



Type of genus — Phyllotoma'i Jlavescens Marlatt.^ 



Rather large robust species of the habitus of Taxonus (Ermilia) ; 



antennae hairy, normally nine jointed, but in the type of the geno- 



a Entomologische Nachrichten, vol. 22, 1896, p. 313. 



b Fauna Napoli. Tenthr., p. 106. 



c Prospetto Imenotteri Italiani, vol. 3, 1894, p. 155. 



d Can. Ent., October, 1908, p. 366. 



e Proc. U. S. Nat. Mus., vol. 21, 1898, p. 494. 



