PTEROMALIDAE OF N.W. EUROPE 215 



clothed with whitish hairs most of which stand out only slightly, the whorl at the base of each 

 segment more outstanding, at an angle of about 40°. 



Fore wing with speculum, on lower surface of wing, with more numerous scattered hairs ; 

 marginal vein slightly shorter relative to the stigmal vein. 



Petiole about as long as broad, only slightly shorter than the propodeum. Gaster oval, 

 shorter and narrower than the thorax, with a ventral plica. 



The female of microstolus sp. n. differs from that of laevis (Delucchi) as follows : 



Colour of head and thorax brighter (green, instead of greenish varied with bronze and pur- 

 plish) ; tibiae more or less infuscate. Head slightly less transverse, temples slightly less 

 convergent ; malar space slightly shorter. Combined length of pedicellus and flagellum shorter, 

 in microstolus barely equal to, in laevis distinctly greater than, the breadth of the head ; flagel- 

 lum rather more slender proximally but thickening distinctly distad, so as to be clavate ; 

 funicular segments shorter, in laevis all the segments, except sometimes the sixth, are longer 

 than broad ; the first segment is about 1 -5 times as long as broad, and about equal in length to 

 the pedicellus. Thorax rather more strongly arched. 



Fore wing with upper surface of costal cell with fewer hairs, in laevis there is a row extending 

 over the distal half of the cell ; basal cell with fewer hairs, in laevis the cell has a few hairs 

 apically near the basal vein, and is partly closed below ; stigma as high as long, in laevis 

 tending to be very slightly longer than high. 



Gastral petiole shorter, in laevis about as long as the propodeum and about 1-5 times as long 

 as broad ; gaster longer, in laevis shorter than the thorax. 



Holotype 2. England : Oxfordshire, Otmoor, 28.viii.1955, on Angelica (Graham), 

 in Hope Department, University Museum, Oxford. 



Paratypes. England : Oxfordshire, Radcot, 2 2, 5JX.1954, on flowers of Angelica 

 sylvestris ; Otmoor, 2 (J, 1 2, 27.viii.1955, in a marshy place with much Angelica. 

 3 J, 28.viii.1955, on Angelica ; Berkshire, Wytham, 1 2, 5.1X.1959, in a marshy place 

 between Wytham Wood and the River Thames. Paratypes in author's collection. 

 All the above specimens were captured by the writer. 



Biology. Unknown. 



I have not seen the types of the three following species, which are omitted from 

 my key to species. They should be recognizable from the characters given by 

 Delucchi in his key to the species (1955). 



Gitognathus nitidus Delucchi 



Gitognathus nitidus Delucchi, 1955 : 68, 69-70, $. 



Type material. Holotype 2, Germany, Wolfratshausen, iv.1950 (F. Groschke), in 

 coll. Delucchi (not seen). 



Germany. 



Biology. Reared from Phytomyza obscurella Fin. on Aegopodium (Delucchi, 



1955 : 70). 



This appears to be a valid species. From the description it might come near the 

 species I have assigned to the genus Glyphognathus. 



