144 BRITISH ICHNEUMONS. 



clypeus and face entirely or in part black or white. Antennae of ? long, 

 setaceous, apically attenuate, with first flagellar joint nearly thrice longer 

 than broad, ninth quadrate ; tricoloured, joints nine to thirteen pale above 

 only ; of c^ black with the sca])e white, and usually the flagellum rufescent, 

 beneath, joints seven to sixteen bearing tyloides. Thorax black, that of c? 

 with white lines before and usually beneath^the radix, and the mesosternum 

 laterally fusco-pubescent ; metanotum closely punctate, usually with com- 

 plete upper areae, of which the areola is quadrate or, in S, transverse, 

 hardly emarginate apically ; costulae and petiolar region not or hardly 

 entire. Scutellum convex sub-glabrous, flavidous-white ; rarely apically 

 black in d . Abdomen oblong-ovate in 5, elongate in S; black, segments 

 two and three, sometimes also apex of one and base of four, red ; five to 

 seven with broad, gradually narrowed white marks in $ , which are usually 

 obsolete or wanting in ^ ; fourth rarely also with white apical spot ; post- 

 petiole abruptly dilated, densely aciculate throughout ; gastrocaeli broad 

 and somewhat deep, inclosing several distinct costae ; the intervening 

 space striolate in S ', anus acuminate, terebra distinctly exserted. Legs 

 somewhat slender, red ; coxae, trochanters and apices of $ hind femora, 

 of their tibiae and tarsi black ; tibiae of S sometimes in part flavidous ; 

 coxae evenly punctate, shining with short pilosity and no scopulae. Wings 

 slightly clouded, stigma fulvous, tegulae piceous. Length, 12-16 mm. 



The shape of the areola of the $ is variable, and it is sometimes 

 hexagonal. 



Berthoumieu has named two varieties of the cj nigrkaudus and tiii^ro- 

 saefellaius, which need no description. 



Hope sent Gravenhorst both sexes from Netley. Stephens found the 

 females not uncommonly about London towards the end of summer, and 

 his male {iocenis, Grav.) more rarely, in June and July, in the same district, 

 and in Salop. It is probably common in Britain ; I have received it from 

 (juestling near Hastings (Bloomfield) ; Lyndhurst, early in June (Adams) ; 

 Rossbeigh, Co. Kerry, in June (Donisthorpe) ; Bovey Tracey, Devon, 

 middle of August (Hamm); and there are several examples in Dr. Capron's 

 collection. Bignell has taken it at Horrabridge, in Devon, in June ; it is 

 recorded from Essex; and Marshall twice found it at Cornworthy, near 

 Totnes. On the Continent, where it is quite common, occurring in 

 August, in woods and meadows, it has been bred from Melitaea Cynthia, 

 and the female is said to hibernate in moss. 



34. silaceus, Grav. 



Icluictivioii silaceus, Gr. I. E. i. 278 ; Ste. 111. M. vii. 160, ? ; cf. Wesm. Mt5m. 

 couron. Ac. Belg. 1859, p. 33 ; Thorns. O. E. xviii. 1933, c5 9 ; Berth. Ann. Soc. Fr. 

 1S94, p. 608, 9 . 



? . Head entirely black. Antennae somewhat slender, strongly attenu- 

 ate, flagellar joints one to six obscurely rufescent beneath, seven and 

 eight entirely white. Thorax black throughout ; areae as in /. raptorws 

 (no. 44, post). Scutellum white. Abdomen laterally broadly rounded, 

 apically sub-obtuse ; black, with segments two and three clear red, latter 

 with apical margin flavous ; five to seven broadly, fourth minutely, 

 white-marked ; post-petiole aciculate ; gastrocaeli normal ; second segment 

 transverse. Legs red \ all the coxae, trochanters and the apical half of 

 hind femora black ; tibiae flavescent, the anterior red within and at apex ; 



