384 Rev. F. D. Morice and J. H. Durrant on the 



" J'avais d'abord donne a ce genre le nom d'astatus, qui 

 a ete adopte par MM. Panzer et King ; mais des considera- 

 tions particulieres m'ont engage a lui substituer celui de 

 trachelus "■ — but this alteration of a name published six 

 years previously in the Erlangen List cannot be accepted. 



The Type of both Astatus Jrn. and Ce-phus Ltr. is 

 pygmaeus L. — this species is also the type of Trachelus 

 Jrn. (nn.). 



Konow made Astatus, Trachelus, and also Cephus, etc., 

 distinct genera, and Rohwer, apparently following him to 

 some extent, gives to Astatus Jrn. the Type : troglodyta 

 F., to Cephus Ltr. the Type : pygmaeus L., and to Trachelus 

 Jrn. the Type : tabidus F. These divisions are probably 

 of generic value, but the names proposed are unavailable 

 in these senses — also troglodyta and tabidus are species not 

 included in the Erlangen List. Rohwer also revives the 

 name Cepha. Billberg (with Type : tabidus F.), calling it 

 isogenotypic with Trachelus Jrn. ; it may be proved that 

 the name Cepha Billberg is valid, but owing to its similarity 

 to Cephus Ltr., Cepha Billberg would be a very undesirable 

 name in the Hymenoptera and Trachelastatus (nn.) is here 

 suggested in its place. 



*Astatus Knw. has been renamed by Schulz [Spoha 

 Hym. 211 (1906)] Eumetabolus — with Type : niger Harris 

 (i. e. troglodyta) — the identification of niger, however, with 

 the Type-species of a genus which is almost certainly not 

 British at all, rests on very sandy foundations. The niger 

 of British collections = satyrus Pzr. 



10 



I-IO. §UR0CERUS Jrn. Erl. Litt-Ztg. 1. 163. 



" Gen. 10 Urocerus — Sirex Camelus, Dromedarius." 



XIPHYDRIA Ltr. (1802) 



= § Urocerus Jrn. (1801) nee Geoffr-Fourcr. ; = Hybonotus Klug 

 (1803); =-tXiPHYDRA (Ltr.) Pzr. (1806). 



Type 1 : Ichneumon camelus L. (Ltr. 1802; 1804). 



XiPHYDKiA Ltr. = ^Urocerus Jrn. Erl. Litt-Ztg. 1. 163 no. 10 

 (1801) — [camelus L. ; dromedarius L.]. XiPHYDRiA Ltr. HN. Crust- 

 Ins. 3. 304 (1802)— [Type: camelus L.]: 13. 145-6 no. 332 sp. 1-3 

 (1804-5). HmoNOTUsKlug Mon. Siric. Germ. 9-16 sp. 1-2 Pf. 1-4-7, 

 8-9-15 (1803) — [Type: camelus L.] Xiphydria Ltr. Nouv. Diet. 

 HN. 24. Tbl. Meth. 173, 199 no. 376 (1804); F. Syst. Piez. pp. ix, 

 52-3 no. 8 sp. 1-3 (1804). ^UROCERUS Pzr. Fn. Ins. Germ. 85-10 

 (1805) fXiPHYDRA Pzr. Krit. Rev. Ins. Deutsch. 2. 56-7 (1806). 



