316 BRITISH ICHNEUMONS. [ Adelognathus 


(3). 4. Prothorax and frontal orbits entirely 
black od ike se .. 2, CHRYSOPYGUS, Grav. 
(2). 5. Antennae shorter than half body ; 
anus not entirely pale aS .. 3. BREVICORNIS, Holmgr. 
(1). 6. Petiole sublinear; third segment dis- 
cally rufescent ope ae .. 4. DORSALIS, Grav. 
1. pallidipes, Grav. 
Plectiscus pallipes, Gr. 1. E. ii. 981, 9. Adelognathus Ruthet, Holmgr. Sv. 
Ak, Handl. 1855, p.198, ¢ @?, pl. viii, fig. 13; Brisch. Schr. Ges. Phys. Konig. 
1871, p.89, ¢ ¢. <A. pallipes, Thoms. O. E. ix. 878 et xix. 1277, ¢ 2 (nec 
Holmgr.). 
Head as broad as thorax, not constricted behind eyes ; mouth, clypeus, 
whole face and the frontal orbits, pale stramineous ; frons convex, black 
with a triangular glabrous area; face parallel-sided and centrally sub- 
convex; clypeus not discreted, apically subtruncate; labrum elongately 
exserted, flavous and apically rounded ; mandibles flavous, gradually con- 
stricted to their infuscate apices; palpi elongate and pale. Antennae 
filiform, slender, longer than half body and hardly stouter apically, with 
the two basal flagellar joints of equal length ; infuscate with the scape pale 
and flagellum rufescent beneath ; of ¢ entirely pale basally, with 8th—roth 
joints bearing elevated lines. Thorax stout, shining, with mesonotum 
finely and sparsely punctulate ; prothorax of g entirely, and of ? partly, 
stramineous ; notauli distinct and pleurae strongly nitidulous ; metathorax 
short, shining, with no discal areae but the petiolar in ¢ nearly com- 
plete and in @ apically indicated; spiracular areae not discreted. Scu- 
tellum a little convex, of ¢ often red. Abdomen subovate or subtriangular, 
strongly nitidulous and black, becoming more or less broadly testaceous 
in 2 from its fourth or fifth segment, of g¢ with only apices of segments 
pale ; basal segment very smooth, deplanate, gradually dilated apically, 
with spiracles a little beyond centre; second smooth with an oblique im- 
pressed line on either side at its base; 3rd to 5th often with sparse, deep 
punctures ; venter stramineous. Legs normal, entirely pale with the 
apical tarsal joint alone infuscate ; hind tibiae subincrassate, basally con- 
stricted, with short calcaria. Wings subample; areolet wanting, radial 
nervure apically subcurved, nervellus oblique and hardly intercepted. 
Length, 3—4 mm. 
In 1888, since when little or nothing has appeared upon this genus, 
Thomson regarded it as distinct from all other species in the pale face, 
clypeus and only lower frontal orbits, lack of areolet, slender but distinct 
epicnemia, comparatively long antennae with their postannellus more than 
double length of scape, not discreted spiracular areae, smooth second seg- 
ment and broad petiole. 
It is probably as common in France and Germany as Holmgren 
describes it in Sweden; and Brischke says (Schr. Nat. Ges. Danz. 1878, 
p. 95) of it “ Ich erzog diese Art aus einer Larve von Lmphytus filiformis. 
Am 18 Juni kamen aus derselben weissliche Maden, welche sich am 21, 
jede besonders, ein derbes, gelb-braunes Cocon spannen, Anfangs Juli 
schliipften die Wespen aus.’’ It was recorded from Britain in both Mar- 
shall’s catalogues, | know not upon what authority as the only one in his 
collection is misnamed under the next species; but I possess several in 
