20 BRITISH ICHNEUMONS [Xylonomus. 



sparsely punctate, and not longitudinally canaliculate nor eyes emargin- 

 ate ; face closely and somewhat strigosely granulate. Antennae slender, 

 sub-attenuate basal ly and nearly as long as the body ; their underside 

 distinctly setiferous before the hardly attenuate apices. 'I'horax immacu- 

 late ; mesonotum strongly deplanate and distinctly punctate with the 

 notauli deep ; metanotum transstrigose and centrally carinate from the 

 apex of the triangular basal area to the base of the explanate and laterally 

 strongly bidentate petiolar area. Scutellum black and punctate. Abdo- 

 men not broader than the thorax and closely scabriculous throughout; 

 basal segment slightly and gradually dilated throughout, fully thrice 

 longer than broad, basally bicarinate to its centre, with the spiracles 

 a little before the centre ; second and third segments distinctly and 

 obliquely impressed in their basal angles ; terebra exactly as long as the 

 body, spicula apically dilated and dart-shaped. Legs red with the hind 

 ones castaneous ; front femora apically incrassate, their tibiae incrassate 

 and internally excised before the strongly constricted and pseudo-jointed 

 base, apical tarsal joint black ; tarsal claws small, calcaria short and of 

 equal length. Wings fulvescent and not broad; stigma and radix testa- 

 ceous ; areolet wanting and the straight radial nervure coalesced with the 

 external cubital for some distance ; second recurrent strongly curved ; 

 nerv'ellus sub-opposite and intercepting in the centre. Length, 15 mm. 



This species was described in 1856 from females in Desvignes' collection 

 captured at Bewdley, in Worcester; and no one appears to have recognised 

 it since that time. 



3. irrigator, ^<^f>- 

 Ichneiiinoii irrigator, Fab. E. S. ii 152 {ncc Panz.). Bassits irrigator, Fab. 

 Piez. 97. Xylonontus irrigator, Gr. I. E. iii. 837 ; Zett. I. L. 382 ; Ratz. Ichn. 

 d. Forst. i. 123; ii. lOS ; Holragr. Sv. Ak. Handl. 1860, n. 10. p. 69 ; Tasch. Zeits. 

 Ges. Nat. 1863, p. 300; Thorns O. E. viii. 775 i J. X . Gravcnhorstii, Curt. 

 B. E. pi. cccliii, ? .* 



A somewhat shining and subrugulosely punctate, black species \\\i\\ the 

 abdomen partly red and stigma basallv broadly white. Head tumidous, 

 punctate and dilated behind the eyes, black with the mouth testaceous and 

 mandibles basally castaneous. Antennae slender and pubescent ; of 

 ^ immaculate ; of 9 ^vith the eighth to thirteenth flagellar joints for the 

 most part white ; scape often badious beneath. Thorax immaculate ; 

 metathorax with five complete upper areae of which the areola is subhexa- 

 gonal and the petiolar laterally produced to the short and distinct 

 apophyses. Scutellum apically carinate. Abdomen black with the first 

 segment coarctate and deeplv impressed behind the spiracles, slightly 

 curved, longer than the hind coxae and finely bicarinate throughout ; the 

 second linearly impressed in the basal angles, of 9 transverse or of ^ 

 subquadrate ; the two basal segments castaneous, of 9 "lore rarely red 

 or laterally black ; third concolorous with the apex more or less broadly 

 black, of 9 rarely entirely black or castaneous ; 9 ^^'ith the fourth to 

 sixth ventral segments subprominent ; terebra slightly longer than half 



* Xylonomus Gravenhorstii, Curt. 

 The three females standing under this name in the British Museum are from Stephens' collection, 

 and are certainly synonymous with A'. (VriAT^'of. They have the abdom^n entirely pale castaneous 

 and are small, witli a total length of 7 mm. Curtis only knew two British species of the genus, 

 X. pilicrtrnU and his own .Y. Giavenhontii ; the latter, he says, is distinguished from the former " by 

 its short antennae and ovipositor, and by its more slender form ; the b.ise and tip only of the abdomen^ 

 are black; it is smooth, not rugose, and the longitudinal lines at the base are scarcely visible." 

 He took two females " near London." 



