178 



BRITISH ICHNEUMONS. 



This species occurs on flowers of Ani:;elica syiveslris, in August and Sep- 

 tember ; Bridgman found it, at Earlham, near Norwich, and Marquand 

 records it from the Land's End district ; Beaumont took it at Plumstead ; 

 in the British Museum is an example named by Desvignes, taken in 

 " Suffolk," by Fred Smith ; Essex. It does not appear to be uncommon 

 on the Continent, but has not been yet bred. 



14. divisorius, Grav. 



lihiieitmon divisoiius, Clr. Mem. Ac. Sc. Torin, 1S20, p. 335 ; I. E. i. 470 ; Sle. III. 

 M. vii. 1S9, i. Aiiihlyteles divisorius, Wesni. Noiiv. Mt'm. Ac. Brux. 1S44, p. 133; 

 Bill. Ac. Brux. 1854, p. 127 ; Holmgr. Iclin. Siiec. ii. 258 ; Berth. Ann. Soc. Fr. 1895, 

 p. 585, 6 ? . C/eiiichneiniioii divisorius, Thorns. O. E xix. 2084, i ? . Var. Ichueiiiiion 

 edicloritis, Gr. I. E. i. 228 ; Ste. 111. M. vii. 152 ; Wesm. Nouv. M6in. Ac. Brux. 1844, 

 p. 218, 6. 



Head black, a little narrowed behind the eyes and towards the mouth ; 

 frons with two slight depressions ; $ with facial orbits white. Antennae 

 rather stout, black ; of ? strongly attenuate, white- banded with third 

 flagellar joint sub- quadrate ; of $ with the basal flagellar joints sub- 

 dentate. Thorax stout, black ; callosity beneath, and in $ before, the 

 radix generally white ; mesonotum punctate and shining ; metathorax 

 rugulose-punctate ; areola, especially of $ , transverse, apically entire ; cos- 

 tulae wanting ; petiolar area tri-divided ; apophyses sub-obsolete ; spiracles 

 sub-linear. Scutellum white. Abdomen elongate-elliptic, black ; segments 

 two and three pale red, with their apical margins nearly always black ; 

 anus immaculate ; post-petiole aciculate, laterally rounded, carinae distinct, 

 apical angles obtuse ; gastrocaeli and thyridii large, deep and rugose, with 

 the intervening space about as broad as centre of post-petiole, aciculately 

 rugose ; ventral segments two and three with, but fourth without, a fold ; 

 hypopygium of S not apically acuminate. Legs normal, black ; femora 

 somewhat stout, those of c? more or less white internally ; front tibiae of ? 

 within, and the posterior, more especially of 6 , broadly banded in the 

 centre with, white ; c? with tarsi pale, the posterior becoming apically 

 piceous. Wings a little clouded and flavescent ; stigma fulvous, ferru- 

 gineous, or rarely darker. Length, 15-17 mm. 



The colour of the legs is somewhat variable, since the ^ occasionally 

 has the external base of the hind femora white-marked ; and the hind 

 tibiae of the $ , sometimes immaculate, are rarely as broadly white-banded 

 as are those of the 3. Both sexes may have the central segments fusco- 

 castaneous. 



The variety edktoriiis is abundantly distinct in colour, having the abdo- 

 men entirely black, or sometimes the central segments narrowly margined 

 with red ; the tibiae also are broadly white-banded. It is said to occur in 

 May, but Stephens calls it very rare about London, 



From C. nm/>uiatorius, Panz., this species differs in its elongate meta- 

 thoracic spiracles and its smaller antennal scrobes, as well as in the colour 

 of its legs ; and from C. Ussonoiiis, Holmgr., in the aciculate base of the 

 second segment, white-marked hind legs, and simply punctate mesonotum. 



This is undoubtedly quite a common species in Britain, though I can 

 find no records since Stephens said it was uncommon, in June, near 

 London. Miss Chawner has taken several examples in the New Forest ; 

 Rev. A. Thornley several at Mablethorpe and Tiddlethorpe, in Lines., and 



