Euceros | BRITISH ICHNEUMONS. 283 

carinate, but with no areola. Abdomen stout and broader than thorax, 
entirely black, or with all the incisures very narrowly testaceous, or (form 
typ.) with the basal segment alone apically white banded, except cen- 
trally; venter basally ochreous; terebra not exserted, ¢ valvulae 
recurved. Legs pale fulvous with the anterior coxae and trochanters 
black or badious ; hind legs black and stout, with only extreme apices of 
femora and extreme base of tibiae castaneous ; claws small and pectinate. 
Wings hyaline with radix and tegulae flavous, stigma piceous; nervellus 
subopposite and intercepted distinctly below its centre. Length, 
“—rIomm. 6 Q. 
The @, which has not before been described, differs only in the cen- 
trally explanate antennae and flavescent mandibles. Vollenhoven says he 
knew four Dutch females and had seen what he thought to be another in 
Holmgren’s collection from Sweden, under that author's name £. 
mortonellus, synonymised by himself “ certissime’”’ with Gravenhorst’s 
species and differing from the present only in its central facial and ante- 
radical markings. I possess examples with and without mesonotal and 
apical scutellar marks. 
This species, which is entirely distinct from Z. serricornis, in spite of 
its author’s remarks (Pinac. 53), was brought forward as British, but un- 
named, by Dr. Capron in his “ Notes on Hymenoptera” (Entom. 1880, 
p. 87) from the neighbourhood of Guildford in Surrey, where he took a 
single female in 1879; this, with three others from his collection, I now 
possess. The unique male was captured by me in woods at Haven 
Street in the Isle of Wight on 28th June, 1907, and is in my collection. 
4. albitarsus, Curt. 
Euceros albitarsus, Curt. B. E. pl. delx; Voll. Pinac. pl. xxxiii, fig. 7, ¢; Gir. 
Verh. z.-b. Ges. 1857, p. 166, pl. iii, figg.2,3, ¢ ¢; cf. Bignell, E.M.M. 1897, 
p. 158 et Wesm. Bull. Ac. Brux. 1841, p. 362. 
Shining, black, very densely and somewhat finely punctate, and shortly 
pubescent. Head buccate and black with the inner orbits, a mark at the 
outer and another on the cheeks, stramineous; @ also with whole 
mouth, face, cheeks and a small frontal mark concolorous. Antennae of 
¢ very strongly compressed and explanate centrally, and externally ful- 
vous from centre to near base; of 9 infuscate and centrally compressed, 
though not explanate. Thorax with distinct notauli, of 9 immaculate, 
of g¢ with a dot before the subhamate and concolorous line before radices, 
a line below them and a mesopleural mark, stramineous ; metathorax very 
short, strongly punctate and transcarinate with no areola. Scutellum 
black. Abdomen stout, bright red, and broader in Q; with the quadrate 
and centrally subcarinate basal segment, except apically, alone black and 
its spiracles far before the centre; remaining segments strongly trans- 
verse with incisures deeply impressed, rarely discally black dotted. Legs 
red and somewhat stout; coxae and trochanters black, the former in ¢ 
externally flavous-marked ; hind tarsi black with the claws fulvous and in 
¢ joints two to four pure white. Wings a little clouded apically; tegulae 
black, in ¢ white-marked. Length, 7—13 mm. 
Curtis’ “magnificent novelty” still remains extremely rare; he knew 
but a single male in 1837, taken off dock in May or June on the borders 
of a wood, near Milton in Northants; Vollenhoven does not tell us 
whence came the male he erroneously terms Z. crassicornis in Pinac.; 
