96 M. W. R. de V. GRAHAM 



in the Chalcidoidea. They differ from other lamprotatines chiefly by the more 

 compact form of the thorax, the bidentate mandibles and the fact that the scutellum 

 is usually without a transverse groove." Their biology presents some interesting 

 features. Several species are known to be gall-makers, though some are probably 

 true parasites. Perhaps some of the genera now included in this tribe should be 

 transferred to Ormocerini; for example some species currently placed in 

 Brachyscelidiphagini but which do not conform to Gahan & Ferriere's diagnosis of 

 that tribe because they have distinctly tridentate mandibles. 



The number of apical spurs on the hind tibiae is not a satisfactory character for 

 distinguishing tribes within Miscogasterinae. The number sometimes varies even 

 within the limits of a single genus, and is to some extent correlated with absolute 

 size; for example, in Halticoptera, large species have two very distinct spurs, very 

 small species may have only one. 



Key to Tribes (European) 



i Antennae (Text-figs. 103-109, 118-121, 142, 144, 145, 156, 157, 165-168, 172, 



176-185) 13-segmented : either with two distinct anelli and six or seven 

 funicular segments, or (less often) with three anelli and five funicular 

 segments ............ 6 



Antennae (Text-figs. 187-194, 199-200, 209-211, 221, 223-225, 229, 239-247, 

 257, 268, 275-280) with 10 to 12 segments : either with only one anellus 

 visible in dried specimens ; or if with two anelliform segments, then rarely 

 having more than five funicular segments ; if with three anelliform seg- 

 ments, then only two funicular segments ...... 2 



2 (1) Postmarginal vein of fore wing 1-7 to 2 times as long as the marginal vein ; 



speculum absent, the fore wing almost entirely pilose ; mandibles bidentate, 

 separated even when closed (Text-fig. 186) from the clypeal margin by a 

 space, in which the labrum is usually visible ; head, and dorsum of thorax 

 excluding the propodeum, thickly though shortly pilose ; eyes conspicu- 

 ously hairy ; body black, non-metallic . . . MICRADELINI (p. 247) 

 Postmarginal vein of fore wing rarely longer than the marginal vein and then 

 only slightly so ; speculum most often present ; mandibles with three or four 

 teeth, when closed not leaving a space between their upper edge and the 

 clypeus ; body most often more or less metallic, if black without metallic 

 tinge, then either the head and thorax are more sparsely pilose or the eyes 

 are nearly bare .......... 3 



3 (2) Antennae (Text-figs. 275-280) 10-segmented ; with only five segments, one 



to four of which may be anelliform, between the pedicellus and the clava ; 

 usually at most four of these segments have sensilla PIRENINI (part) (p. 328) 

 Antennae (Text-figs. 189-194, 199-200, 209-211, 221, 223-225, 229, 239-247, 

 257, 268) 11- or 12-segmented : with six or seven segments (one or two 

 of which are anelliform) between the pedicellus and the clava ; five or six of 

 these segments have sensilla ........ 4 



4 (3) Females with tip of hypopygium situated nearly or quite level with tip of 



gaster. Both sexes with antennal toruli touching the clypeus ; meso- 

 scutum and scutellum sparsely pilose ; body black or weakly metallic 



PIRENINI (part) (p. 328) 



Females with tip of hypopygium nearly always remote from tip of gaster, if 

 nearly level with it then the antennal toruli are separated by at least their 



