10 BRITISH ICHNEUMONS. [Tropishs. 



horst thought his single example came from the vicinity of Hanover. 

 I was, then, surprised to capture a female by " dandling " (i.e. gently 

 swinging backwards and forwards through the air) my net over herbage 

 by the road-side at Lyndhurst, in the New Forest, on 12th August, 1901. 

 It differs very slightly from T. /alcatus,Th.oras., in its smaller size, shorter 

 terebra, black coxae and the conformation of basal segment, which in the 

 latter is subconcave discally. Nothing is yet known of the habits of either 

 species and the genus is without males, which are probably deplanate, 

 like those of the Stilptiides. 



ODONTOMERUS, Gvavenhorst. 

 Gr. I. E, iii, 851 (1829). 



Abdomen claviform, petiolate ; areolet wanting ; hind femora stout, 

 compressed and dentate ; terebra elongate. Head very broad, short, 

 cubical or transversely subglobose, and anteriorly convex ; eyes oval and 

 prominent ; clypeus short, semi-circular, deplanate, smooth and pubescent, 

 basally discreted and laterally remote from the eyes ; mandibles short, 

 basally dilated, apically narrow and shortly bifid, with the upper tooth a 

 little the longer ; palpi elongate and pilose with the basal joint truncatelv 

 clavate, the second compressed and the apical three cvlindrical, with the 

 apical obtuse and about as long as the penultimate. Antennae slender 

 and filifonn-setaceous, of 9 submoniliform ; scape cylindrical with the 

 apex straight and hardly excavate ; flagellar joints discreted, cylindrical 

 and apically nodulose, the basal ones the longest and a little constricted 

 basally. Thorax cylindrical and deplanate, with distinct mesonotal 

 notauli ; metathorax rugose in (J , smoother in 9 ; metanotal areae 

 distinct ; spiracles large, oval and oblique. Scutellum deplanate and tri- 

 angular with the apex obtuse. Abdomen subpetiolate, convex, smooth, 

 pyriform and as broad as thorax ; basal segment with the petiole linear 

 and as long as the postpetiole, \\ hich is a little broader and gradually 

 explanate apically. Terebra exserted, usually rather longer than the 

 abdomen. Legs short ; hind femora stout, sub-compressed and beneath 

 dentate ; tarsal claws small and simple. Wings somewhat narrow with 

 no trace of areolet. 



Thomson remarks (O.E. viii, 776) that the conformation of the thorax 

 and wings is exactly as in Xylonomus, although the short stout and 

 apically attenuate antennae, basally inflexed genal costa, somewhat broad 

 abdominal epipleurae, long and stout claws, and the strongly dentate hind 

 femora render it abundantly distinct. Gravenhorst draws attention to the 

 relationship of this genus with his Pachymenis (Collyria). 



We possess, as far as is at present known, but one of the four European 

 species (or if the modern fallacy of regarding seven distinct species be 

 continued we may, perhaps, claim three of these "forms") and that 

 would appear to be of \'ery rare occurrence with us, and is now, for the 

 first time proved to prey upon uncommon lignivorous larvae. 



1. dentipes, Gmc\. 

 Ichneumon dentipes, Grael. S.N. i, 2719, i . I. nispator, Fourc. E.P. ii, 397 

 {nee Linn). Xorides dentipes, Gr. Beit. Ent. Schl., 1829, p. 15, fig. ii ; Ratz. 

 Ichn. d. Forst, ii, 107, j ? ; c/. iii, 115. Odonto»ienis dentipes, Gr. I.E. iii, 854 ; 

 Holmgr. Sv. Ak. Handl. 1860, n. 10, p. 73 ; Tasch. Zeits. Ges. Nat. 1863, p. 304, 

 (f ? . O. punctulatus. Thorns. O.E. viii, 777, ? ; Kriech. Ent. Nachr. 1889, p. 

 76; Schm. Opusc. Ichn. 1376, cf ? . 



