408 M. W. R. de V. GRAHAM 



161 (160) Occiput margined medially. Propodeum with a convex, quite strongly 



reticulate nucha . . . EUPTEROMALUS Kurdjumov (p. 737) 



- Occiput not margined. Propodeal nucha often narrow and weakly sculp- 



tured, or hardly developed . . . . . . . .162 



162 (161) Dorsal surface of hind coxa with some hairs in the proximal half ; propodeal 



callus thickly hairy . . . . . . . . . .163 



- Dorsal surface of hind coxa bare in the proximal half or more ; propodeal 



callus less thickly hairy . . . . . . . . .164 



163 (162) Third anellus at least fully 1-5 times as broad as long ; fore wing with basal 



cell thickly pilose over at least its distal half ; thorax only about 1 -4 times 



as long as broad .... ATRICHOMALUS Graham (p. 737) 



- Third anellus not or hardly transverse ; fore wing with basal cell less thickly 



hairy, or bare ; thorax 1 -55 to 1 -7 times as long as broad 



TRICHOMALUS Thomson (p. 707) 



164 (162) Propodeum medially as long as or longer than the scutellum, very strongly 



produced beyond the bases of the hind coxae, with a large convex strongly 

 reticulate nucha. Antennal clava in profile appearing asymmetrical, 

 with one edge strongly curved, the other nearly straight. Legs, including 

 the coxae at least mainly, testaceous to reddish. Lower surface of fore 

 wing, below the marginal vein, with a row of rather long, downward- 

 pointing hairs ...... CALLITULA Spinola (p. 458) 



- Propodeum medially at least slightly shorter than the scutellum, not or only 



slightly produced beyond the bases of the hind coxae ; nucha most often 

 undeveloped, if developed then relatively small and not strongly reticulate. 

 Antennal clava in profile not or hardly asymmetrical. Coxae usually dark, 

 occasionally the fore coxae yellow. Lower surface of fore wing, below the 

 marginal vein, with shorter hairs which do not form a distinct row . . 165 



165 (164) Face, frons, and vertex with a pattern formed by a smooth sinuous line 



(Text-figs. 325-327) 166 



- These parts without such a pattern . . . . . . .167 



166 (165) Antennal flagellum rather stout, subfusiform ; fifth flagellar segment fully 



as broad as the pedicellus ; anelli transverse ; proximal segments of 

 funicle usually slightly transverse. Pattern of head, Text-fig. 325. Both 

 mandibles with four teeth .... MERAPORUS Walker (p. 681) 

 Antennal flagellum clavate, proximally slender with fifth flagellar segment 

 less stout than the pedicellus ; anelli as long as broad ; segments one to 

 four of funicle quadrate or even very slightly longer than broad. Pattern 

 of head, Text-figs. 326, 327. Left mandible with three teeth, right 

 mandible with four . . LEPTOMERAPORVS Graham (p. 687) 



167 (165) Anterior margin of clypeus incised medially (cf. Text-fig. 528) . . . 168 



- Anterior margin of clypeus at most moderately deeply emarginate as in 



Text-fig. 526, sometimes truncate . . . . . . .170 



168 (167) Lower edge of antennal toruli distinctly above level of ventral edge of eyes. 



Propodeum without plicae . . . KARPINSKIELLA Boucek (p. 632) 



- Lower edge of antennal toruli not, or only slightly, above level of ventral 



edge of eyes. Plicae at least indicated in the posterior part of the propo- 

 deum, sometimes reaching its base . . . . . . .169 



169 (168) Marginal vein of fore wing about 1-5 times as long as the stigmal vein. 



Terminal segment of maxillary palpi not dilated PSILONOTUS Walker (p. 625) 



- Marginal vein about i-8 times as long as the stigmal vein. Terminal seg- 



ment of maxillary palpi dilated . MESOPOLOBUS Westwood (p. 638) 



170 (167) Thorax somewhat depressed dorso-ventrally, the scutellum in profile appear- 



