PTEROMALIDAE OF N.W. EUROPE 379 



J 55 ( J 54) Head and thorax green to blue ; POL hardly greater than OOL ; antennal 

 clava (Text-fig. 502) shorter than the three preceding funicular segments 

 together CHLOROCYTUS Graham (p. 611) 



- Head and thorax bronze to greenish bronze ; POL 1 -4 to 1 -6 OOL ; antennal 



clava about as long as the three preceding funicular segments together 



PEGOPUS Forster (p. 684) 



156 (154) POL about 1-5 times OOL ; antennal clava asymmetrical, its dorsal edge 



more strongly curved than its ventral edge 



LEPTOMERAPORUS Graham (p. 687) 

 POL equal to, or hardly greater than, OOL ; antennal clava in profile 



appearing symmetrical or virtually so . HABROCYTUS Thomson (p. 494) 



157 (in) Propodeum with a more or less distinct costula (Text-figs. 312, 373-376, 



378-38o) 158 



- Propodeum without a costula . . . . . . .160 



x 58 ( J 57) Pronotal collar sharply, though sometimes finely, margined throughout, or 



except just at the sides ; propodeum more than half as long as the scutellum, 

 its median area wholly reticulate, the costula distinct, straight or only 

 slightly angled . . . . . . . . . . .159 



Either the pronotal collar is at most weakly margined in the middle only ; or 

 the propodeum is less than half as long as the scutellum ; or the costula is 

 weak, or distinctly angled in its middle (Text-figs. 374-380) . . . 161 



x 59 ( J 58) Antennal flagellum stout, subfusiform, with all the funicular segments quite 

 strongly transverse ; head thick antero-posteriorly ; propodeal nucha 

 convex, strongly reticulate, and distinctly limited in front by a transverse 

 depression ...... HALOMALUS Erdos (p. 781) 



Antennal flagellum subclavate, with at least the proximal funicular segments 

 not transverse ; head relatively more transverse ; propodeal nucha 

 (Text-fig. 312) relatively less convex and not, or not very distinctly, limited 

 in front ........ ABLAXIA Delucchi (p. 572) 



160 (157) Anelli, or at least the second anellus, quadrate or hardly transverse ; pro- 



notal collar margined anteriorly by a sharp carina which is usually very 

 strongly raised. Spiracular sulci of propodeum rather shallow, finely 

 reticulate or alutaceous . . . EUMACEPOLUS Graham (p. 633) 



Anelli distinctly, often strongly, transverse. If the pronotal collar is sharply 

 margined, then the carina is fine and only slightly raised, or else the 

 spiracular sulci of the propodeum are distinctly impressed and punctate 161 



161 (160) Posterior ocelli rather large, separated by only about 1-5 times their own 



major diameter from the eyes, the latter separated by only 1-15 to 1-2 

 times their own length ; mesoscutum with several shallow though distinct 

 piliferous punctures ; anterior margin of clypeus truncate. Pronotal collar 

 finely but sharply margined throughout. Fore wing usually with fuscous 



clouds NEPHELOMALUS Graham (p. 697) 



Posterior ocelli usually smaller and separated by at least twice their own 

 major diameter from the eyes, if by somewhat less then the mesoscutum 

 has no piliferous punctures and the anterior margin of the clypeus is 

 emarginate medially. Pronotal collar often weakly margined, or im- 

 marginate. Fore wing sometimes infumate, but rarely with definite 

 fuscous markings . . . . . . . . . .162 



162 (i<a) Propodeum with panels of median area very shiny, smooth or at most very 



weakly sculptured . . . . . . . . . .163 



Propodeum with median area distinctly and usually strongly sculptured; 



reticulate, wrinkled, or obliquely strigose-reticulate . . . .164 



