BRITISH ICHNEUMONS. I7 



I. fusorius, Linn. 



lihncunion fusorius, Linn. F. S. ed. i. no. 966 ; ed. ii. no. 159S ; Berth. Ann. Soc. 

 Fr. 1894, p. 525, (J ? ; r/". Thorns, lib. cit. 1886, p. 14. /. pisoriiis, Gr. I. E. i. 462 ; 

 Ste. 111. M. vii. 188 ; Zett. I. L. 363 ; We.sm. Noiiv. M(^m. Ac. Rrux. 1844, p. 24 ; 

 Ratz. Ichn. d. Forst. i. 137 ; ii. 134 ; iii 171 ; Fonsc. Ann. Soc. Fr. 1847, p. 400; Wesm. 

 Bui. Ac. Brux. 1857, p. 363 ; Holmgr. Ichn. Suec. 10, (5 ? . Protidiiiejunon fusorius, 

 Thoms. O. E. xviii. 1900, 6 9. 



A very large and stout species, somewhat resembling Trogus superficially. 

 Head black, with cheeks and temples somewhat inflated ; frontal broadly, 

 and a dot at the vertical orbits flavidous ; $ with mouth, clypeus, face and 

 nearly the whole orbits flavous. Antennae stout, black ; ? white-banded, 

 attenuate and compresso-dilated before apex ; scape flavous beneath in $ . 

 Thorax with the pronotum, callosities before and beneath radix and the 

 scutellum, flavous ; metathorax rugulose, upper areae complete ; areola 

 elongate, apically emarginate and elliptic towards the base. Abdomen 

 brick-red ; first segment, except sometimes its apex, and very rarely the 

 anus, black ; post-petiole finely aciculate, strongly punctate at its apex ; 

 gastrocaeli broad and deep. Legs black ; anterior with coxae often white- 

 marked, and the femora in part, the tibiae and tarsi, somewhat flavidous ; 

 intermediate tibiae sometimes apically black ; hind femora, tibiae and tarsi 

 basally flavous ; coxae of ? not scopuliferous. Wings infumato-hyaline ; 

 stigma fulvous or fuscous ; tegulae piceous, of $ with a flavous mark. 

 Length, 22-25 ''^'"''^• 



Examples occur with flavous vittae on the mesonotum and pleurae. 



At once distinguished from the following, which it much resembles, 

 though constantly of a larger size, by the flavous markings, the antennal 

 band alone being white, and by the more acute tubercles of the mesoster- 

 num, as well as by the nude hind coxae of the $ , which last character it 

 shares only with P. fuscipennis, Wesm. 



This species has been bred on the Continent, where it is widely 

 distributed, from a large variety of hosts : — Smerinthus ocellatus, S. populi, 

 Sphinx ligtisiri, S. pinastri, Ptilodontis palpina, Tryphaena promiba, and 

 Hadena pisi. It would appear to be rare in Britain, since Stephens says it 

 is so around London, and neither Bridgman nor Bignell met with it in 

 Norfolk and Devon ; but these notes must be regarded with caution, since 

 the true synonymy was not discovered till 1893. There is no doubt, 

 however, that this species occurs with us, since I have seen an example in 

 Bignell's collection, taken in Ireland. 



2. pisorius, Linn. 



Ichneiunoii pisorius, Linn. F. S. ed. i. no. 96S ; ed. ii. no. 1589 ; Berth. Ann. Soc. 

 Fr. 1894, p. 524, i ?i ; cf. Thoms. lib. cil. 1886, ]). 14. /. cxpectatorius. Fab. E. S. 

 Suppl. 219; Piez. 59,9. /. siinilatorius, Holmgr. Ichn. Suec \. \l, 6 9 {>icc Fab.). 

 / fusorius, Gr. I. E. i. 457, excl var. 4 ; Ste. 111. M. vii. 187 ; Wesm. Nouv. Mom. Ac. 

 Brux. 1844, P- 24, excl. var. i ; Bui. Ac. Brux. 1848, pp. 143, 335. /. leiitorius, 

 Panz. F. Ci., 9 . /. fugatorius, i'anz. Scliacf. Ic, 9 • Protichucuinon pisorius, Thoms. 

 O. E. xviii. 1900. 



Smaller than the preceding, but the sculpture is the same. Very like 

 P. erythrogaster, but somewhat stouter. Head black ; cheeks somewhat in- 



1 Berthoumicu (lac. cit.) gives as a synonym " /. crassicornis ? Desv. Trans." I find no found- 

 ation for this reference, and am not aware that Desvignes described an insect under this name. 



