Clis/oprga.] BRITISH ICHNEUMONS. 139 



related to Glvpta and Lycorina in the impressed abdomen, but differs 

 from the latter in its apically rounded scutellum and from the former in 

 the rugose abdomen, simple tarsal claws, narrow mandibles and short 

 terebra. 



Tabh' of Species. 



(2). I. Abdominal tubercles less distinct ; 



abdomen black i. \^<^\\-\\0\<, Fah. 



(i). 2. Abdominal tubercles more distinct ; 



abdomen red 2. rufator, Holmgr. 



1. incitator, Fah. 



Ichneumon incitator, Fab. E.S. ii. 172. Piinpla incitator. Fab. Piez. 117. 

 (?) P. ovivora. Boh. Sv. Ak. Handl. 1821, p. 335, excl. ? . Clistopyga incitator. 

 Gr. I.E. iii. 134, ? ; Holmgr. Sv. Ak. Handl. 1860, n. 10, p. 35 ; Tasch. Zeits. Ges. 

 Nat. 18i;3, p. 273; Brisch. Schr. Nat. Ges. Danz 1880, p. 115, <? ? ; Voll. Pinac. 

 xiii, fig. 8, ? . Var. C. haemorrhoidalis , Gr. I.E. iii. 135, 9 . 



Head black with the clypeus and ligula pale ; palpi and all the orbits, 

 as well as often, the face white. Antennae slender and filiform, longer 

 than half the body ; entirely or beneath ferrugineous. Thorax gibbous 

 and cylindrical ; black with a callosity before the radix, generally also the 

 propleurae and a small line below the radix, white ; mesonotum black or 

 ferrugineous, with two more or less elongate discal vittae stramineous ; 

 mesosternum and pleurae, and sometimes the metapleurae, pale castane- 

 ous. Scutellum black or red, usually with its apex and the postscutellum 

 white. Abdomen parallel-sided, as broad as and twice longer than the 

 thorax ; black with the incisures, especially towards the anus, ferrugineous ; 

 segments two to five transverse-obliquely impressed on either side at base 

 and before the subelevated apex ; hypopygium of 9 rufescent ; terebra 

 hardly half as long as the abdomen, with the valvulae pilose. Legs ful- 

 vous and stout ; the anterior with the coxae and trochanters stramineous, 

 the former generally basally and the latter laterally nigrescent, their 

 femora dull stramineous or often fulvous, their tibiae stramineous with 

 the intermediate apically and basally infuscate, and the intermediate tarsi 

 nigrescent ; hind legs with coxae and trochanters more or less black and 

 stramineous or entirely either, their tibiae and tarsi infuscate, the former 

 at the centre and base and the latter with the base of the joints whitish. 

 Wings normal, hyaline or very slightly clouded ; stigma and radius 

 infuscate, radix and tegulae white ; nervellus intercepted below the centre. 

 Length, 5 — 8 mm. 



The colouration of this sj)ecies is extremel) variable ; var. haemorrhoida- 

 lis has the face entirely flavous, and the scutellum and anus entirely red ; 

 Holmgren's variety has the face entirely black, the thorax not at all red- 

 marked and the size smaller. 



It is synonymised by Schmiedeknecht (Opusc. Ichn. 1175) with 

 Polysphincta ekgans, Ratz., which is said (Ichn. d. Forst. ii. loi) to have 

 been bred by Wissmann from beech, infested with Auobii and Plilinus 

 pcctinicornis {cf. Trans. P^nt. Soc. 1907, ]). 21). Brischke, however, bred 

 it in Prussia from Retiuia resitiana. It is not very common in northern 

 and central Europe, where it sometimes occurs in May on hazel, and 

 Tosquinet records it from Belgium in August. It is by no means an un- 

 common species in Britain, whence Hope sent it to Gravenhorst from 



