PTEROMALIDAE OF N.W. EUROPE 319 



from subquadrate to slightly transverse ; second segment slightly transverse, the following 

 ones distinctly so, fifth nearly or quite twice as broad as long ; clava broader than the funicle, 

 1-5 to 1-7 times as long as broad, its length equalling 3-33 to 3-5 of the preceding funicular seg- 

 ments. Thorax about i-6 times as long as broad. Mesoscutum about i-6 times as broad as 

 long, moderately shiny, especially in front, with very fine engraved sculpture ; mid lobe with 

 numerous hairs ; notauli deep, slightly bisinuate. Scutellum hardly longer than the meso- 

 scutum, distinctly longer than broad, sculptured like the mesoscutum but more finely and deli- 

 cately, with three to four pairs of bristles ; frenum marked off only by a fine and superficial 

 line ; scutello-axillar sutures converging only moderately, meeting the mesoscutum somewhat 

 mesad of the hind ends of the notauli. Axillae sculptured like the scutellum. Dorsellum 

 about half as long as the scutellar frenum, polished and smooth. Propodeum medially nearly 

 one third as long as the scutellum, shiny and weakly alutaceous ; median carina fine ; plicae 

 absent ; spiracles nearly circular, very close to hind edge of metanotum ; callus with several 

 hairs, the pilosity extending nearly to the edge of the metapleuron. Metapleuron shiny, weakly 

 alutaceous ; mesepisternum delicately alutaceous below, but with an upper subtriangular 

 area which is shiny and virtually smooth ; mesepimeron distinctly marked off, nearly three 

 times as long as broad, nearly smooth ; mesosternum polished and nearly smooth, mesolcus 

 fine and weak. Postspiracular sclerite shiny, with some delicate alutaceous sculpture. Legs 

 rather short ; femora moderately stout ; hind coxae nearly twice as long as broad, shiny, with 

 delicate engraved, or hardly raised, alutaceous sculpture which is rather wide-meshed, with 

 hairs along the whole length of their dorsal surface ; spur of mid tibia about two thirds the 

 length of the first tarsal segment. Fore wing about twice as long as broad ; costal cell nine to 

 ten times as long as broad, its lower surface with two irregular rows of hairs plus some additional 

 hairs in the distal quarter, upper surface bare except for a row of hairs extending over the distal 

 third to half of the cell ; basal cell hairy over about its distal third ; speculum partly open 

 below, on upper surface of wing moderate-sized but not extending farther than the base of the 

 marginal vein ; wing beyond the speculum thickly pilose ; marginal vein from very slightly 

 to distinctly longer than the postmarginal vein, but 2 to 2-5 times as long as the stigmal vein, 

 the latter shaped much as in venustus sp. n. (cf. Text-fig. 251). 



Gastral petiole strongly transverse. Gaster oval or elliptic, depressed dorsally, about as 

 long and as broad as the thorax, 1-3 to 1-5 times as long as broad, bluntly pointed apically ; 

 ovipositor sheaths only slightly exserted ; basal tergite occupying about one third of the total 

 length, with a subtriangular basal fovea ; last tergite much broader than long ; ventrally the 

 gaster is only slightly convex, with the tip of the hypopygium situated about half way along. 



o*. Unknown. 



Holotype 9. ? Lapland : Wittang, labelled " Wit ", and remounted on a card, 

 on the same pin as, but below, a female of citripes (Thomson), in Thomson collection 

 Universitetets Institutionen, Lund, Sweden. 



Paratypes. Sweden : Skane, Ringsjon, 1 $, in Thomson collection, Lund, 

 labelled by A. Jansson " lativentris n. sp." [unpublished name]. Scotland : 

 Inverness-shire, Aviemore, 1 $, 16. vi. 1965, swept from foliage of Populus tremula L., 

 near the railway station (Graham), in Graham collection. 



The female of lativentris sp. n. is very close to that of citripes (Thomson) which 

 differs in having the gaster from slightly to as much as 1-3 times as long as head 

 plus thorax, narrower than the thorax and slightly compressed, including the ovi- 

 positor sheaths 2 -0-2 -5 times as long as broad, the ovipositor sheaths slightly more 

 exserted, to a length about equal to that of the first segment of the hind tarsus, the 

 tip of the hypopygium situated slightly before the middle ; combined length of 

 pedicellus and flagellum fully equal to, or slightly greater than, the breadth of the 



