BRITISH ICHNEUMONS. 149 



It is difficult to correctly place a c^ whose $ is unknown, and this would 

 appear as natural a situation as can at present be found for it. From 

 /. ex/ensorius, it appears to differ primarily in the entirely fuscous hind 

 tarsi, as well as in its rather more shining and coarsely rugose metathorax, 

 distinctly broader post-petiole, the coloration of the abdomen and head, 

 that of the latter being paler, and of the former darker. 



It appears related to /. Haglmidi in the coloration, the coarsely sculp- 

 tured thorax and sub-deltoid areolet ; the immaculate anus and antennal 

 band will, however, instantly distinguish it therefrom. 



Marshall introduced this species as British, in his 1870 Catalogus, under 

 the genus Ainbiyfeks, but, in 1872, he restored it to Ichneumon. It 

 appears to be little known on the Continent, occurring only in Germany 

 and Piedmont ; I know of no indigenous examples. 



40. rufidens, Wesni. 



Ichneumon rufidens, Wesm. Nouv. Mem. Ac. Brux. 1S44, p. 49 ; Berth. Ann. Soc. 

 Fr. 1894, p. 607, 9 . 



5 . Head black, facial orbits generally pale ; mandibles narrow, red, 

 edentate ; clypeus large, flat, smooth and usually laterally rufescent. An- 

 tennae somewhat slender, setaceous, white-banded ; second joint much 

 longer than broad. Thorax black ; areola transverse, irregularly hexagonak 

 Scutellum flavous-white ; post-scutellum sometimes castaneous. Abdomen 

 black ; post-petiole, segments two and three entirely, and fourth laterally, 

 red ; six and seven with large, and fifth sometimes with small, dorsal 

 flavous marks ; post-petiole bicarinate, more or less distinctly aciculate ; 

 gastrocaeli small and superficial, as broad as the intervening space. Legs 

 black ; femora more or less apically, tibiae and tarsi, red; hind legs with 

 apices of tibiae black, tarsi entirely fuscous ; coxae not scopuHferous. 

 Stigma fiavous; tegulae piceous; radix rufescent. Length, 10 mm. c^ un- 

 known. 



The peculiar structure of the mandibles and clypeus is very distinctive. 



This species was introduced as British, by Marshall, in 1870, but I know 

 of no indigenous records ; it would appear to be rare on the Continent, 

 being only found in Belgium and Holstein. 



41. caloscelis, JVesm. 



I. animonius, Gr. Mem. Ac. Sc. Torin, 1820, p. 301 ; I. E. i. 279, excl. false i ; Ste. 

 111. M. vii. 160 ; cf. Wesm. Mi^m. couron Ac. Belg. 1859, p. 33. /. caloscelis, Wesm. 

 Nouv. Mum. Ac. Brux. 1844, p. 59, 9 ; Bui. Ac. Brux. 1849, p 37, S ; Holms^r. Ichn. 

 Suec. i. 102 ; Thorns. O. E. xviii. 1937; Berth. Ann. Soc. Fr. 1894, p. 60S, i 9. Var. 

 /. zonalis, Kriech. Ent. Nachr. 9 • 



Head a very little narrowed behind the eyes ; cheeks only slightly 

 buccate ; clypeus obsoletely punctate, almost glabrous, rounded and a 

 little produced apically in the centre ; ? generally with the mouth parts, 

 frontal and vertical orbits rufescent ; S with palpi, mandibles, cly[)eus, 

 face, frontal orbits, and sometimes a genal mark, flavous. Antennae of ? 

 slightly attenuate apically, fifth joint quadrate, black with a white band 

 or tricoloured ; S black, with the first five joints cylindrical, the scape 

 flavous and flagellum rufescent beneath. Thorax black ; S vvith pronotuni 

 and callosities before and beneath the radix flavous ; metathorax distinctly 



