9G t^P"'- 



15 (14) Inner margin of stigma dark, brown or blackish; basal abdoiuinal 

 segment very shining, and on its apical part much less closely 

 punctured, the second segment usually distinctly shining and willi 

 the punctures less extremely close, especially about the middle ; 

 face obviously less wide lativentris Sch. {decqnens Perk.). 



10 (13) Abdomen in some species distinctly pale along the apical margins of 

 at least some of the more basal segments, or with a raised line at 

 the hind angles of the propodeum ; some are quite small (not 12 mm. 

 in expanse of wings), the mesonotura often finely punctured, and in 

 some the distinct tomentose pattern is absent. 



17 (34) Propodeum at the hind angles with a raised margin (occasionally 

 confused with upstanding rugosites), so that the posterior declivous 

 face is separated by this from the upper surface. 



IS (19) Lateral pronotal angles in dorsal aspect distinct or subprominent, 

 rectangles, or nearly so. 



(Anterior area of propodeum finely rugose in front, the wrinkles 

 fading out posteriorly so that the surface becomes only minutely 

 rugulose or granulate in appearance; basal abdominal segment with 

 copious, but extremely fine punctures on the disc.) 



.... maJachurhs K. (small var. = longidus Sm.). 



lU (18) Pronotal angles indistinct or very obtuse. 



20 (31) Mesonotum often dull or only moderately shining under a strong h^ns, 



owing to the minute sculpture, over at least a large part of the 

 surface, between the punctures ; abdomen often with lateral spots 

 or band of dense tomentum at the base of the 2nd segment. 



21 (24) Larger species, the alar expanse even in small examples usually 



13 mm. (in well-developed calceatus 17 mm., in allipes 15 mm., and 

 larger examples of each occur), median (supraclypeal) plate of face 

 very densely punctured. 



22 (23) Basal abdominal segment in perfectly clean specimens with a very 



conspicuous * glaucous bloom, the ridges which define the apical 

 impression at the sides usually more distinctly produced inwardly, 

 so that the impression is more distinct across nearly the whole width 

 of the segment, which is often somewhat flattened in the middle 

 apically ; 2ud segment in the middle mure clothed with minute 

 pubescence albii)e& K. 



23 (22) pMsal segment at most with a very slight glaucous bloom, polished 



black, widely convex in the middle apically, the disc of the 2nd 

 segment much less clothed with minute hairs, or almost glabrous 

 there, 



(As a species larger than alhipes, and with the face of different 

 shape, more rounded at the sides.) 



.... calceatus Scop, (cylindricus R). 



24 (2ij Smaller species, individual large examples of some rarely attaining 



13. mm. in expanse ; supraclypeal plate not very densely punctured, 

 except in aberrant examples, and then the expanse is less than 

 above. 



* To sec this dearly llio segment should be touched over with a brush damped with pure beuzol. 



