52 R. W. CROSSKEY 



8 Scutellum with two pairs of marginal setae (Text-fig. 65). Presternum with one 



or two long strong downwardly directed hairs or setae on each side. Head of <$ 

 almost fully holoptic and with uppermost eye facets appreciably larger than 

 lowermost facets, head profile as Text-fig. 39. Supra-alar area of the scutum 

 with only one strong isolated seta, viz. the first sa seta, both pre-alar and second 

 sa setae absent (Text-fig. 54). Labellae with a pair of palpiform processes 

 posteriorly (usually distinct). Parafacials haired. Pallid forms with unusually 

 weak abdominal bristling, and very weakly developed postscutellum. [Parasites 

 of scarabaeoid beetles] PALPOSTOMATINI (p. 53) 



- Scutellum with at least three pairs of marginal setae (except in some Minthoini). 



Prosternum bare (except in Minthoxia and Hyleorus). Head of $ sometimes 

 with eyes strongly approximated but not virtually holoptic, uppermost and 

 lowermost facets not noticeably differentiated in size, head with different profile. 

 Supra-alar area of the scutum with at least two setae and usually three (pre-alar 

 seta normally differentiated but sometimes absent in Minthoini, second sa seta 

 present though sometimes weak). Labellae without palpiform processes. 

 Parafacials bare (except in Voria with a strong downcurved seta). Not such 

 forms, postscutellum always strongly convex. [Parasites, where hosts known, 

 of Lepidoptera] ............ 9 



9 Ocellar setae strong and reclinate. Propleuron haired. Facial ridges armed with 



strong downcurved setae on their whole height. Pteropleural seta absent. 

 Humeral callus with four setae. Eyes haired . . CAMPYLOCHETINI (p. 60) 



- Ocellar setae proclinate (sometimes absent). Propleuron bare. Facial ridges 



bare or with weak setulae confined to their lower halves. Pteropleural seta 

 present or absent. Humeral callus with fewer than four setae (except in 

 Nemoraeini). Eyes bare or haired . . . . . . . . 10 



10 Wing with apical part of M (i.e. M t ) and cross-vein m-cu exceptionally oblique, 



and with the last section of vein Cu x exceptionally long (much longer than m-cu 

 and nearly as long as the penultimate section) (Text-figs 82-84). Head of £ 

 with proclinate orbital and outer vertical setae (like the 9) , and with frons equal 

 in width to that of $. Pteropleural seta absent. Presutural intra-alar seta 

 present. Scutellum with long stiff erect preapical setae immediately dorsad 

 of the apical setae ........ VORIINI (p. 61) 



- Wing with M x and m-cu not unusually oblique, and with the last section of vein 



Cu x short (at most only very slightly longer than m-cu). Head of <$ nearly 

 always with frons narrower than in 9 and without proclinate orbital setae (except 

 in Halydaia), almost always without differentiated outer vertical setae. Ptero- 

 pleural seta absent or present. Presutural intra-alar seta absent. Scutellum 

 without erect spiniform preapical setae . . . . . . . . r 1 



11 Vein i?, setulose. Pteropleural seta absent. Scutellum with three pairs of strong 



marginal setae, the apical pair crossed and horizontal and the subapical pair 

 very widely separated. Second costal sector haired below. Eyes bare or 

 virtually so. 3 + 3 dc setae THELAIRINI (p. 63) 



- Vein i? x bare. Pteropleural seta present. Scutellum not so bristled, apical setae 



if present very weak. Second costal sector haired or bare below. Eyes bare 



or haired. 2 + 3 or 3 -f- 3 dc setae ....... .12 



12 Inner anterior surface of the fore coxa almost entirely haired. Eyes densely 



long haired. Abdominal Ti + 2 excavate to its hind margin. Lower calypter 

 haired on the dorsal surface of its outer edge (in addition to its normal fringe- 

 hair) . Face with a slight but distinct median ridge, visible in profile (Text-fig. 38) . 

 Humeral callus with four or more setae. Palpi noticeably flattened dorso- 

 ventrally. 3 + 3 dc setae NEMORAEINI (p. 66) 



- Fore coxa bare on at least most of the inner half of the anterior surface. Eyes 



bare or haired. Abdominal Ti + 2 not excavate to its hind margin. Lower 



