Promethus] BRITISH ICHNEUMONS. 117 

1. sulcator, Grav. 
Bassus sulcator, Gr. I. E. iii. 320, excl. varr. 2—5 et 1,3 ?; cf. Holmgr. Sv. 
Ak. Handl. 1854, p.84. B. festivus, Zett. I. L. i. 378, ¢ (nec Fab.). B. areo- 
latus, Holmgr. Sv. Ak. Handl. 1854, p. 85; Jib. cit. 1855, p. 365, ¢ ¢ ; cf. Brisch. 
Schr. Nat. Ges. Danz. 1878, p. 113, ¢. Promethus sulcator, Thoms. O. E. xiv. 
1479; Morl. Trans. Ent. Soc. 1905, p. 429, ¢ ¢. 
A slender black species. Head ‘as broad as thorax and triangular; 
cheeks elongate, epistoma of ? not pale, frons smooth and centrally sub- 
sulcate, clypeus unequally foveolate and apically slightly emarginate; d 
with face, cheeks, and frontal orbits shortly, stramineous; @ mouth and 
clypeus pale. Antennae elongate, slender, filiform, reaching beyond 
thorax nearly to anus, basally nigrescent or, especially in ¢, pale 
beneath. Thorax discally shining and nearly smooth throughout, black 
with no pale humeral marks; notauli indicated, pleurae smooth; basal 
metanotal area distinct and subquadrate; petiolar area large, subovate 
and nitidulous. Scutellum black and subconvex. Abdomen black with 
segments three, four and apex of second red, fifth rarely concolorous ; 
basal segment aciculate, twice longer than broad, parallel-sided, with 
spiracles not very prominent; second basally a little constricted and sub- 
striate between the distinct and subpellucid thyridii; anus of @ by no 
