106 BRITISH ICHNEUMONS. [ Homocidus 

20. crassicrus, Thoms. 
Bassus fissorius, Holmgr. Sv. Ak. Handl. 1855, p. 362, ¢ (nec Grav.). Homo- 
porus crassicrus, Thoms. O. E. xiv. 1516; Morl. Trans. Ent. Soc. 1905, p. 428, 2. 
A black species with subhamate humeral marks, sides and apex of scu- 
tellum, and the mouth whitish; legs stout and red, basally black-marked ; 
hind tibiae white, with only their apex and tarsi infuscate. Length, 
6—7 mm. 6 unknown. 
In superficial facies and the colouration of head and thorax this species 
exactly resembles 7. dimidia/us, but it is stouter and usually larger, the 
abdomen is more strongly punctate, the legs thicker with the stout hind 
tibiae becoming very narrowly nigrescent at their extreme apex only; 
face parallel-sided; clypeus only slightly emarginate apically in the 
centre, and not reflexed laterally; cheeks short; speculum partly glabrous, 
base of mesopleurae white throughout; metathorax subrugosely punctate; 
abdomen not half as long again as the thorax; postpetiole quadrate ; 
second segment transverse and scabrously punctate, though not striolate, 
between the circular thyridii. 
This female is much mixed with the preceding in collections, and I 
must own that I doubt its being aught but a large and well-nourished 
form of Schrank’s species. Boheman found it in Sweden and Thomson 
in the Isle of Oland, off the Swedish coast. With us it is certainly un- 
common, though I have twice taken it in Suffolk at the end of August, 
on flowers of Angelica sylvestris in Tuddenham Fen and Finborough Park ; 
and possess others taken at Tostock in Suffolk by Tuck, Harting in 
Sussex by Beaumont, both in early September, and at Shere in Surrey by 
the late Dr. Capron. 
21. longiventris, Thoms. 
Bassus pumilus, Holmgr. Sv. Ak. Handl. 1855, p.364, excl. 9. Homoporus 
longiventris, Thoms. O. E. xiv. 1514; Morl. Trans. Ent. Soc. 1905, p. 428, ¢ ¢. 
A black species, with capital and thoracic pale markings; legs red, 
hind tibiae whitish with their base hardly and apex not broadly infuscate- 
ferrugineous; anterior trochanters and coxae stramineous; second seg- 
ment twice longer than broad. Length, 3—5 mm. 
Very like H. dimzdia‘us, but at once recognised by its elongate second 
abdominal segment, pale ventral plica and narrowly rufescent-marked 
hind tibiae; face not apically dilated; cheeks short; clypeus apically 
subemarginate and laterally not reflexed; palpi and mandibles whitish; 
6 flagellum pale testaceous beneath ; scutellum sometimes white marked 
at base or apex; abdomen double length of thorax, sublinear, of @ 
apically narrow and subcompressed ; basal segment half as long again as 
apically broad ; second nearly twice longer than broad, basally not strio- 
late between the circular thyridii; ventral plica basally whitish; ¢ with 
third and fourth segments sometimes basally white; legs slender and red 
with the anterior coxae and trochanters entirely stramineous ; stigma dull 
testaceous. 
This species is described from Sweden ; and the only subsequent record 
of which I am aware is my own introduction of it as British six years ago, 
on the strength of a male swept in a marshy spot at Brandon, in Suffolk, 
on July 4th, 1903. Rev. T. A. Marshall possessed a male from Govilon, 
in Monmouth. 
