312 BRITISH ICHNEUMONS. [ Grypocentrus 

and stout thorax, and ovalabdomen. It was divided into three by Thom- 
son on account of the petiolate abdomen of some of the species placed 
here by Holmgren and now relegated to La/hrolestus, while Rhaestus has 
entirely distinct facies. A great deal yet remains to be done in the 
elucidation of the small insects constituting the present genus; the 
specific characters now in use are not good; and I possess three or four 
other British species, which it appears inadvisable to at present synony- 
mise with Continental names. The untenable position of this genus in 
Dalla Torre’s catalogue appears referable to Ashmead, who in 1900 also 
placed it in the Plecfiscidae, with which it has nothing in common, as is 
abundantly proved both by its structure and Tenthredinid hosts, which 
also include Blennocampa apicalis whence his new G. ducidus (Schr. Nat. 
Ges. Danz. 1888, p. 11) was bred by Brischke. 
Table of Species. 
(6). 1. Metanotal areae strong; abdomen 
with at most incisures pale. 
(5). 2. Abdomen with segments apically 
pale and the anterior trans- 
impressed, 
(4). 3. Mesopleurae punctate; areolet en- 
tirely wanting i ie .. I. CINCTELLUS, Auzhe. 
(3). 4. Mesopleurae glabrous; areolet nearly 
always entire af it .. 2. INCISULUS, Ruthe. 
(2). 5. Abdomen entirely black with no seg- 
ment transimpressed at -. 3. ALBIPES, Aurhe: 
(1). 6. Metanotal areae obsolete ; abdomen 
centrally broadly red os .. 4. ANOMALUS, Brzsch. 
1. cinctellus, Ruthe. 
Grypocentrus cinctellus, Ruthe, Stett. Ent. Zeit. 1855, p.54; Holmgr. Sv. Ak. 
Handl. 1855, p. 193, ¢; Brisch. Schr. Nat. Ges. Danz. 1878, p.94, ¢ ?. 
Pubescent and somewhat shining, with abdominal incisures red and 
areolet wanting. Head tumidulous and not posteriorly constricted, shin- 
ing and punctulate; ¢ with palpi and mandibles flavous; face somewhat 
prominent centrally; clypeus strongly elevated, deeply discreted and 
apically subrounded, smaller in ¢; mandibles red with the unequal teeth 
infuscate. Antennae a little shorter than body, infuscate and paler below, 
scape elongate and not excised, pedicellus as long as basal flagellar joint ; 
scape of ¢ flavous below. Thorax shining and black, almost narrower 
than head and sparsely punctulate; notauli obsolete, mesopleurae apically 
punctulate; metathorax short with discal areae and costulae entire, petio- 
lar area rounded, spiracles circular. Scutellum convex and punctulate. 
Abdomen subovate, as long as head and thorax; basal segment punctu- 
late, margined, with subdeterminate discal carinae, basally constricted 
and subcircularly foveate; second and third segments transverse, punctu- 
late, transversely subimpressed before their apices and nigrescent with 
the apical margin broadly rufescent; fourth rufescent with a basal fascia 
or lateral marks infuscate, remainder rufescent. Legs normal and testa- 
ceous with the coxae basally, and hind femora more or less, infuscate; 
hind tibiae stout and in ¢ infuscate. Wings slightly clouded, broad ; 
