BRITISH ICHNEUMONS. I35 



three, and sides of fourth flavous, more or less intermixed with ferru- 

 gineous, the third sub-quadrale and often piceous-marked ; post-petiole 

 very finely aciculate ; gastrocaeli somewhat small. Legs black ; front 

 femora excepting their base, and all the tibiae and tarsi excepting the 

 posterior ones apically, red in ? , stramineous in c? ; ? with scopulae 

 normal and tarsi somewhat broad ; S with front or anterior coxae and 

 apices of the hind trochanters white beneath. Wings slightly clouded ; 

 stigma fulvous ; tegulae black or castaneous, of 3 white-dotted. Length, 

 12-16 mm. 



The broadly pale pronotum, especially of the ? , and the ivory-white, 

 not flavous, markings of the 6, more especially on the trochanters, should 

 at once render this species distinct. 



It extends from central Europe to France and Sweden, and was to be 

 expected in Britain, where it has not been previously noticed. I took two 

 females, which probably hibernate, upon the flowers of Angelica sylvestris 

 at Matley Bog, in the New Forest, on 8th August, 1901. 



25. extensorius, Linny 



Tchneimion extensorius, Linn. F. S. 1761, no. 15S1, 9 ; Gr. I. E. i. 266, ? part., 

 excl. i ; Wesm. Nouv. Mem. Ac. Biux. 1844, p. 55 ; Bui. Ac. Brux. 1848, pp. 155, 

 337, 9 ; Thorns. O. E. xii. 1401 et xviii. 1924 ; Ann. Soc. Fr. 1886, p. 23 ; Berth. 

 ///'. (•//. 1894, p. 650, (^ 9 • /. retractns, Tisch. Stett. Zeit. /. liictatorius, Linn. F. S. 

 1761, no. 1590, i ; Gr. I. E. i. 41 1, excl. varr. i, 4, 9''; Ste. 111. M. vii. 182 et Zett. 

 I. L. 363 (part.) ; Wesm. Bill. Ac. Brux. 1836, p. 337 (gynandromorph.) ; Nouv. M6m. 

 Ac. Brux. 1844, p. 57, 6 part. ; Holmgr. Ichn. Suec. i. jG, S 9 . 



Head not much narrowed behind the eyes, black ; $ with frontal orbits 

 usually rufescent ; S palpi, mandibles, angles only of clypeus, facial orbits 

 and two spots beneath the antennae pale flavous. Antennae black ; ? 

 filiform, hardly at all attenuate towards apex, consisting of about thirty- 

 eight joints, half the length of the body, white-banded ; 3 scape flavous, 

 flagellum often rufescent beneath, joints one to four without tyloides, six 

 to twenty carinate internally. Thorax black, with lines at radix and often 

 the pronotum flavous in c? ; metanotum with three areae only, of which 

 the areola is rectangular, of ? much longer than broad, with its apical 

 margin sharply angulated, of ^ sub-quadrate, apically emarginate. Scu- 

 tellutn wliite ; slightly convex and flavous in S. Abdomen black; of ? 

 oblong-ovate and apically obtuse with segments two and three, base of 

 fourth and very rarely apex of first, red ; the sixth and seventh white- 

 marked ; of c? sub-lanceolate or elongate-elliptic, with segments two and 

 three flavous, citrinous or croceous, fourth sometimes red, at least in the 

 basal angles, third sub-quadrate ; post-petiole aciculate ; gastrocaeli some- 

 what large, and, in S , oblique. Legs black ; the ? with tibiae and tarsi for 

 the most part red, never stramineous-marked ; the hind ones apically, very 

 rarely entirely, black ; hind coxae pilose and closely punctate throughout 

 with scopulae small and somewhat inconspicuous but always present ; the 

 6 with the front femora at apex and more or less laterally yellowish ; their 



1 Since writing the above, I have had the good fortune to capture Ichneumon gradarius, Wesm., 

 ? , which has not before been taken in Britain, upon tlie flowers of .-1 nuclica sylvestris in Tuddenhani 

 Fen, Siiffoll<, at the end of Ant^ust. It differs from /. extinsoiius in its very distinctly dilated tarsal 

 joints, of which the intermediate penultimate is much broader, and in its more distinctly and much 

 less continently punctate frons ; the lcf;s, ton, arc distinctly shorter and more jncrassate. It is said 

 to be parasitic upon Trachea pinipcrda and Characas j^ruminis. 



N 



