BRITISH ICHNEUMONS. 243 



of ? often dentate or carinale beneath. Areolet complete ; nervellus 

 post-furcal or opposite. 



The peculiar appendages of the hind coxae exist almost exclusively in 

 the ? $ , and are, consequently, of but little value in compiling a tabular 

 view of the species in both sexes. Bridg.-Fitch, relying upon colour as of 

 primary distinction, and Certhoumieu, upon the coxal conformation, give 

 none at all, or most unsatisfactory ,$ distinctions. Thomson's thirteen 

 divisions of the genus — excluding Mevesia and Baeoseinus — are of equal 

 value inter se and not always adapted to clear linear arrangement. The 

 following, however, appears to be a comparatively comprehensible con- 

 spectus of our often extremely closely allied species of this pretty genus. 



The insects of this genus, with one or two unauthentic exceptions, are 

 parasitic upon quite small Lcpidoptera, and they have more especially been 

 bred from Psychids, notably Psyche viciella and P. nitidella. 



The extremely close relationship between the genera Phaeogenes and 

 Diadroinus led Wesmael himself to, subsequently, consider them identical, 

 and in this he has been followed by British authors ; but Thomson (O. E. 

 XV. 1630) has placed them upon a fairly satisfactory footing by pointing 

 out that as a rule, beyond the discretion of the clypeus (which is wanting 

 in P. p/anifrofis), the anterior angles of the clypeus are impressed, the 

 antennae shorter and less attenuate apically, with the post-annellus less 

 elongate, and that the ? 9 have the hind coxae (excepting in Holmgren's 

 sub-genera) mucronate, in the present genus. Both genera are now well 

 established upon the Continent. 



Table of Species. 



(4). I. Transverse anal nervure of hind wing not intercepted ; coxae mutic 



(Mevesia, Holmgr.). 

 (3). 2. Legs pale fulvous or basally whitish ... i. ARGUTUS, IVesm. 

 (2). 3. Legs piceous-red, not basally paler ... 2. si.milis, Bridg: 

 (i). 4. Transverse anal nervure of hind wing 

 intercepted. 

 (10). 5. Head tumidulous, strongly dilated pos- 

 teriorly ; coxae mutic (Proscus, 

 Hoiingr:). 

 (9). 6. Pronotum black. 

 (8). 7. Head strongly punctate ; $ face black ; 



$ flagellum white-banded 3. CEPHALOTES, Wcsm. 



(7). 8. Head finely punctate ; $ face flavous ; 



$ flagellum not white 4. SUSPICAX, Wcsm. 



(6). 9. Pronotum white-marked 5. ACUTUS, Grav. 



(5). 10. Head normal, not strongly dilated pos- 

 teriorly. 

 (12). II. Post-petiole coarsely and regularly 

 punctate ; coxae mutic (Baeosemus, 



Forsf.) 6. MiTic.o.sus, Grav. 



(11). 12. Post-petiole not coarsely punctate; 

 coxae of ? usually dentate (Phaeo- 

 genes, aiicit.). 

 (22). 13. Face strongly, somewhat coarsely and 



conflucntly punctate. 

 (15). 14. Clypeus apically sub-sinuate and cen- 

 trally slightly produced 7. STIPATOR, Wesvi 



(14). 15. Clypeus apically truncate or broadly 



rounded. 

 (21). 16. Post-pctiolc not aciculate. 



