62 U. S. NATIONAL MUSEUM BULLETIN 216 



the upper margin broadly pointed medially, where the interantennal 

 process runs down into the shield as a ridgelike tubercle ; interantennal 

 process prominent, compressed, produced a little forward and running 

 into upper corner of facial shield; margin of clypeus projecting well 

 beyond base of labrum, truncate medially, curved at the lateral 

 corners; mandible with two teeth, the lower tooth not impressed and 

 basad of the upper tooth by only about 1.3 the basal width of upper 

 tooth; maxilla and labrum short; temple moderately wide and weakly 

 convex; occipital carina moderately close to foramen magnum, com- 

 plete; prepectal carina ending a little dorsad of sternaulus; second 

 recurrent vein with two bullae; hind femur about 4.0 as long as wide; 

 tarsal claws apparently simple; first tergite in profile with a flat 

 dorsal face and slightly concave anterodorsal face, the two faces 

 meeting in a distinct hump; male clasper convex, without a lateral 

 ridge. This subgenus occurs in the western Palaearctic, whence 

 Clement (1930, Konowia, vol. 8, pp. 335-346) has recorded seven 

 species. 



Ichneumon micratorius Fabricius, the genotype of Clemontia, has 

 usually been determined as a species of the subgenus Tylopius. We 

 have studied the type in Fabricius' collection (Kiel) and find that it 

 is not micratorius of authors but the same as Metopius (Peltocarus) 

 dentatus Fabricius as interpreted by Clement (1930, Konowia, vol. 8, 

 p. 340). 



2. Subgenus Metopius 



Figure 167,a 



Metopius Panzer, 1806, Kritische Revision der Insektenfaune Deutschlands. . . , 

 vol. 2, p. 78. Type: Sphex vespoides Scopoli; designated by Viereck, 1912. 



Peltastes Illiger, 1807, in Rossi, Fauna Etrusca, ed. 2, vol. 2, p. 55. Typ : 

 (Ichneumon necatorius Fabricius) = vespoides (Scopoli); designated by Curt 

 1824. 



Peltopius Clement, 1930, Konowia, vol. 8, p. 347. Type: (Sphex) Metopius 

 vespoides (Scopoli); original designation. 



Facial shield escutcheon-shaped, its upper edge arcuate, its basal 

 point present or absent, sometimes acuminate; interantennal process 

 compressed and forming or surmounted by a median longitudinal ridge, 

 except in a few non-Nearctic species in which the interantennal 

 process is in the form of a short broad triangle without a median 

 ridge; interantennal process continuous dorsally with a sharply com- 

 pressed tubercle in middle of frons, or separated from this tubercle 

 so that the tubercle forms an independant horn; clypeus broad, its 

 margin almost straight, distinctly reflexed and elevated away from 

 base of labrum; lower tooth of mandible absent or present, when 

 present not or weakly impressed, basad of the apex of upper tooth by 

 at least 1.5 basal width of upper tooth; galea and glossa short; temple 



