PTEROMALIDAE OF N.W. EUROPE 649 



Antenna (Text-fig. 544) with pedicellus as long as anelli plus first funicular 

 segment. Gaster 2-4 to 3-5 times as long as broad. Malar space 0-45 to 0-5 

 length of eye. Hypopygium (Text-fig. 551) . . teliformis (Walker) (p. 659) 



48 (45) Gaster 1 -75 to 2-1 times as long as broad, not or only slightly longer than head 

 plus thorax ; last tergite shorter than its basal breadth. Antenna (Text- 

 fig- 547) with first funicular segment as long as or very slightly longer than 

 the second, quadrate to slightly transverse ; pedicellus in dorsal view about 

 twice as long as broad, or even slightly more than twice prasinus (Walker) (p. 657) 



Gaster 2-4 to 4-3 times as long as broad, 11 to 1-5 times as long as head plus 

 thorax ; last tergite usually as long as or longer than broad, only occa- 

 sionally slightly broader than long. Antenna (cf. Text-fig. 544) with first 

 funicular segment at least a little shorter than the second, slightly to 

 strongly transverse ; pedicellus in dorsal view often somewhat less than 

 twice as long as broad .... laticornis (Walker), agg. (p. 658) 



(Males) 



1 Penultimate segment of maxillary palpi conspicuously dilated, and usually 



somewhat spatulate. Head in dorsal view only 1-65 to i-8 times as broad 



as long ............ 2 



Penultimate segment of maxillary palpi at most very slightly dilated. Head 



in dorsal view usually more transverse than in above .... 4 



2 (1) Terminal segment of maxillary palpi inserted near the apex of the penultimate 



segment, the latter dilated but hardly spatulate. Antennae with scape 

 broadest below the middle and narrowing upwards, longer than an eye ; 

 flagellum with one anellus and seven funicular segments, yellow with the 

 last funicular segment and the clava marked with black. Anterior margin 

 of clypeus very shallowly emarginate . . ? mesostenus sp. n. (p. 664) 



Terminal segment of maxillary palpi inserted near the base of the penultimate 

 segment, the latter spatulate. Antennal scape broadest about in the 

 middle, hardly as long as an eye ; flagellum with two anelli and six funicular 

 segments, wholly yellow ......... 3 



3 (2) External edge of mid tibia, just before the apex, with a triangular process 



which is fringed with dark hairs. Anterior margin of clypeus shallowly 

 emarginate. Venation of fore wing infuscate at the junction of the sub- 

 marginal and marginal veins, also on the stigmal and postmarginal veins 



fasciiventris Westwood (p. 666) 

 External edge of mid tibia without any process. Anterior margin of clypeus 

 deeply emarginate medially. Venation of fore wing entirely yellowish 



jucundus (Walker) (p. 667) 



4 (1) Mid tibia conspicuously expanded, at most four times as long as broad, and 



flattened ; sometimes also with a black callosity at its apex, or with a 

 process on its external edge. 



Antennal scape broadest below the middle and tapering upwards . . 5 



Mid tibia neither conspicuously flattened nor expanded, at least six times as 

 long as broad, without a black apical callosity or process on its external edge. 

 In diffinis the mid tibia is slightly expanded and flattened, but is about 

 six times as long as broad ......... 8 



5 (4) Mid tibia less broadly expanded, about four times as long as broad, without a 



process on its external edge, yellowish with a dusky stripe. Antennal 

 flagellum slender ; none of the funicular segments transverse, or at most the 

 last one slightly so ... . pseudofuscipes v. Rosen (p. 667) 



Mid tibia either more broadly expanded, about three times as long as broad or, 

 if rather less than three times as long as broad, then with a triangular sub- 



