208 BRITISH [CHNEUMONS. [ Exventerus 

peus and face entirely flavous; clypeus somewhat convex and slightly 
impressed before its rounded apex. Antennae nigrescent; scape 
flavidous, and flagellum testaceous, beneath. . ‘Thorax immaculate ; meta- 
thorax with five upper areae, of which the areola is elongate. Scutellum 
black and not apically impressed. Abdomen oblong-subfusiform and 
black with segments two to four or five and apex of first red, sometimes 
black-marked ; apical margin of anal segments flavidous; basal segment 
deplanate, laterally margined, with the discal sulcus not very distinct. 
Anterior legs testaceous, their coxae and trochanters flavous with the 
former often black above ; hind legs black, with only. their tibiae and 
tarsi testaceous. ‘Tegulae flavous; nervellus intercepted below its certre. 
Length, 5—7 mm. 

This species is distinct in its posteriorly dilated head, externally 
straight radial nervure and the nigrescent hind femora, which are some- 
times ferrugineous-lined. It is very like “. me/igosus, but the areola is 
laterally not parallel and apically constricted, the anterior femora are 
flavo-stramineous and the hind ones black or infuscate, the basal seg- 
ment is longer and narrower, the face immaculate and the punctulate 
cheeks are more broadly marked. It appears to have been hitherto much 
mixed in Britain with 77ryphon cephalotes (Acrotomus laetus) and identical 
specimens, labelled by Desvignes with the two names, are in the National 
Collection. 
Originally found by Manger about Warmbrunn in Silesia and apparently 
confined to western Europe, but by no means rare with us. Found at 
Kings Lynn by Atmore and at Norwich (Bridgman) ; Bickleigh Woods in 
Devon, early in August (Bignell) ; two from Govilon, near Abergavenny 
