PTEROMALIDAE OF N.W. EUROPE 689 



Pronotum, viewed dorsally, very short and strongly transverse, wholly reticulate, with a 

 transverse row of bristles close to its hind margin. Mesoscutum hardly 1-5 times as broad as 

 long, moderately shiny, its reticulation rather fine, though tending to be wider-meshed on the 

 disc, and only slightly raised above the general surface ; some scattered small punctures are 

 visible amongst the reticulation ; notauli traceable about half way across the mesoscutum ; 

 hind margin of the latter moderately strongly produced backwards in the middle, sinuate on 

 either side of this. Scutellum hardly longer than broad, the breadth of its base about one- 

 quarter the breadth of the mesoscutum ; moderately convex, sculptured like the mesoscutum 

 but more finely. Axillae sculptured like the scutellum. Dorsellum not ridge-like, but forming 

 a transverse convex band which is about four times as broad as long, weakly alutaceous and 

 shiny, not narrowed laterally. Propodeum short, medially one quarter to about one third as 

 long as the scutellum and nearly twice as long as the dorsellum, weakly reticulate and shiny ; 

 raised in a roof-like manner in the middle ; the median part is hardly produced behind the 

 level of the supracoxal flanges, which are extremely narrow ; median carina fairly distinct, 

 plicae indicated at hind margin only ; nucha represented by a narrow transverse strip which is 

 weakly reticulate ; spiracular sulci broad but very shallow, nearly smooth ; callus sparsely 

 pilose. Postspiracular sclerite not very broad, irregularly reticulate. Reticulation of meta- 

 pleuron very fine, that of the mesepimeron and mesepisternum coarser ; mesepisternum with 

 a large subtriangular, almost smooth area below the base of the hind wing. 



Fore wing with costal cell bare on its upper surface except for a short row of hairs at its apex, 

 its lower surface with one complete row of hairs and two other partial rows in its distal third ; 

 basal vein pilose, basal cell (upper surface) with several hairs in the distal third, but open below ; 

 speculum more or less open below. 



Gaster lanceolate, acuminate, 1-25 to 1-45 times as long as head plus thorax, compressed 

 and narrower than the thorax, 2-7 to 4 times as long as broad ; last tergite 1-2 to 1-5 times as 

 long as its basal breadth ; tips of ovipositor sheaths just visible in dorsal view ; tip of hypopy- 

 gium situated at two fifths the length of the gaster or slightly more. 



o*. Differs from the female as follows: 



Length i-6 mm. Eyes separated by about 1-15 times their own length. Antennal scape 

 (Text-fig. 559) only about two thirds as long as an eye, more expanded, hardly four times as 

 long as broad, slightly broader in its upper part than at the base ; pedicellus about 1 -6 times as 

 long as broad ; combined length of pedicellus and flagellum slightly greater than breadth of 

 head ; flagellum nearly filiform, its segments subquadrate ; clava about 2-5 times as long as 

 broad, more pointed than in the female ; flagellum clothed with short hairs which stand out 

 at an angle of 30 to 45°. 



Scutellum somewhat longer than broad. Propodeum, medially, rather more than one third 

 the length of the scutellum. Fore wing with marginal vein about 1-5 times as long as the 

 stigmal vein. 



Gaster oblong, about as long as but narrower than the thorax, depressed dorsally, with a 

 strong median plica ventrally. 



Holotype $. England : Oxfordshire, Otmoor, 21.viii.1955, on flowers of Angelica 

 sylvestris L. (Graham), in Hope Department, University Museum, Oxford. 



Paratypes. Same data as holotype, 1 $, 21.viii.1955, 1 $, 8.1X.1956 ; Berkshire, 

 Wytham, 1 $, 19.vii.1953, on flowers of Angelica sylvestris L. (Graham), in Graham 

 collection. All taken in marshy places. 



Ireland : Antrim, Selshan, 1 $, 26. vi. 1957, taken in marshy ground by the shore 

 of Lough Neagh (Graham), in Graham collection. 



The distinctions between this species and viride (Thomson) are summarized in the 

 accompanying key. 

 Biology. Unknown. 



