Sj>ilocryp/us.] BRITISH ICHNEUMONS. 275 



(Introd. ii. 99) says he bred both the parasite and sj^eciniens " of one of 

 the Pteromalidae " from a single cocoon. 



It is interesting to note that the host emerges between the loth and 

 27th of April, and the Cryptid (as also in the case of Afesosfertiis obnoxiits), 

 very much later, sometimes not till the second week in July, when the 

 host's larvae may be supposed to be in a fit condition for oviposition ; 

 what Bignell records as C. mii:;raior, emerging in Devon at the end of 

 May, is, however, evidently the present species. 



It is a common species, occurring probably wherever its host is found ; 

 I have also specimens from Felden and Stowmarket bred from Trichiosoma 

 tibialis. Fred. Smith mentioned at a Meeting of the Ent. Soc, 7th March, 

 1842, that he had reared the same species of Cryp/i/s, doubtless ciinbicis, 

 from both Trichiosoma liicorum ( = ? tibialis) and Epipone levipes ; this is 

 the only record from Aculcates, and I am certainly of opinion that some 

 error must have crept into Bignell's record of it, l)red by Dr. Mason from 

 Thecla W-album (Buckler's Larvae, ix. Appendix). Cameron, in Brit. 

 Phyt. Hym., records it as parasitic upon Trichiosoma beiiileti {= tibialis), 

 on T. liicorum, Lin., and on Cimbex sylvarum, Fab. There are females in 

 the Hastings Museum ; Bridgman bred it from T. betuleti at Norwich ; 

 Bignell captured it early in July ; and Harwood records it from Essex ; 

 Beathe has bred it at Mickleham, in June. The Cry plus is sometimes 

 destroyed by Hemiteles area tor ; on April 12th, I have bred a female of 

 the latter species from a cocoon of Trichiosoma which was then filled with 

 the Cryptus larvae ; it emerged through a roughly circular hole, exactly 

 one millimetre in diameter, low down in the side of the cocoon. 



Herr Graff bred S. cimbicis, in May, in Germany, from the Cimbex 

 variabilis with Hemiteles dispar, Pezomachus cursitans and Torymus obso- 

 letiis, which last was hyperparasitic upon the Cry[)tid, and three years later 

 he sent the cocoon from which the above had emerged to Ratzeburg, who 

 was able to prove that examples of C. cimbicis were still emerging. Both 

 sexes are recorded from Clavellaria amerinae and a species of Trichiosoma, 

 and the female from Citiibex variabilis, by Tschek. W'^estwood (Trans. 

 Ent. Soc. 3rd series, i. p. Ixxxvii) bred it from a cocoon which had pre- 

 viously produced the perfect Trichiosoina ; and Bridgman (Entom. 1878, 

 p. 35) says four " Cryptus migrator" and the perfect Trichiosoma emerged. 



3. migrator, Fab. 



Iihiieiiniou niif^rator. Fab. S. E. 334, 9 . /■ teiicorhaeus, Don. B. I. xiv. pi. 476, 

 fig. I, 9. Cry/'tin init^ralor, (Jr. I. I'",, ii. 592, excl. i et varr. 5, 9 ; cf. i. .Sup|4. 705 ; 

 Ste. 111. M. vii. 291 ; Ralz. Ichn. d. Forst. i. 145 ; ii. 123 ; iii. 13S; Tasch. Zcils. Ges. 

 Nat. 1S65, p. 102, { i part) 9 ; ( "cc Tschek). C. hoiiihyris, Houdier, Ann. .Soc. Fr. 

 1836, p. 357 (econ.). SpilocrypUis mii^ralor, Thonis. O. E. v. 502 et xxi. 2366, i 9. 

 Var. Crypitis fumipennis, var. 2, Gr. I. K ii. 603. 6 ■ Var. hrachypt , C. bmiptPiiiis, 

 Desv. E. M.M. iii 190, 9 ; (?) Spilocryptiis brcvipennis, Kriech. Ent. Nachr. 1893, 

 p. 54, 9. (?) Pezomactiiis alierrans, (Jrav. I. E. Suppl. 714, 9. 



Head black with cheeks sub-buccate ; internal orbits white, generally 

 obsoletely in 9 > which has the clypeus discretcd, apically sub-truncate 

 with the epistoma prominent ; S with a mandibular and a clypeal mark 

 also white. Antennae of 9 white-banded and basal flagellar joints entirely 

 ferrugineous, with the first at least thrice longer than broad. Mesonotum 

 nitidulous and not very closely punctate ; metathorax of 9 moderately 

 rugose, both transverse costae bisinuate and centrally obsolete, with the 



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