PTEROMALIDAE OF N.W. EUROPE 653 



27 (26) Antennae with pedicellus in dorsal view 2 to 2-4 times as long as broad ; 



scape, except in some typographi, nearly as long as an eye and about 4-5 

 times as long as broad. Malar space half, or slightly more than half, the 

 length of an eye ........... 28 



Antennae with pedicellus in dorsal view distinctly less than twice as long as 

 broad ; scape distinctly shorter than an eye. Malar space slightly less 

 than half the length of an eye ........ 30 



28 (27) Parasite of bark beetles. Antennae with third anellus quadrate or only very 



slightly transverse. Scutellum, including the frenum, with extremely fine 

 reticulation. Median area of propodeum 1 -6 to 1 -75 times as broad as long. 

 Fore wing with postmarginal vein not, or only very slightly, shorter than the 

 marginal vein ; basal cell often with a few hairs in its distal part 



typographi (Ruschka) (p. 673) 

 Not parasitic on bark beetles. Antennae with third anellus distinctly trans- 

 verse. Scutellum with rather less fine reticulation, that of the frenum often a 

 little coarser than the rest. Median area of propodeum 1 -4 to 1 -6 times as 

 broad as long. Fore wing with postmarginal vein sometimes distinctly 

 shorter than the marginal vein ; basal cell, not counting any hairs on the 

 basal vein, bare or virtually so ........ 29 



29 (28) Parasite of Rhabdophaga (Dipt., Cecidomyiidae) on Salix. Pedicellus in 



dorsal view 2-1 to 2-4 times as long as broad rhabdophagae (Graham) (p. 667) 

 Species living in grasses. Pedicellus in dorsal view twice as long as broad 



graminum (Hardh) (p. 663) 



30 (27) Antenna with pedicellus in dorsal view virtually twice as long as broad ; 



flagellum moderately strongly clavate ; first funicular segment subquadrate 

 to slightly transverse, as long as or very slightly longer than the second, 

 fifth segment strongly transverse ; clava about as long as the three pre- 

 ceding funicular segments together. Malar space half, or very slightly more 

 than half, the length of an eye . . . prasinus (Walker) (p. 657) 



Antenna with pedicellus in dorsal view distinctly less than twice as long as 



broad ; the other characters not all present in combination . . . 31 



31 (30) Antennae with flagellum strongly clavate ; all funicular segments transverse, 



the fifth strongly so ; clava as long as 3-5 to 4 of the preceding funicular 

 segments ....... laticornis (Walker) agg. (p. 658) 



Antennae with flagellum moderately clavate ; proximal segments of funicle 

 at most slightly transverse, the fifth only moderately so ; clava at most as 

 long as the three preceding funicular segments together .... 32 



32 (31) Malar space only slightly more than one third the length of an eye. Head in 



dorsal view (Text-fig. 555) with the temples rather strongly convergent, and 

 the occiput rather more deeply excavated . agropyricola v. Rosen (p. 664) 

 Malar space 0-4 to 0-48 the length of an eye. Head in dorsal view (Text-fig. 

 554) with the temples converging only moderately, the occiput less deeply 

 excavated, than in the above . . . . . . . -33 



33 (32) Marginal vein of fore wing i-8 to 2-1 times as long as the stigmal vein 



nobilis (Walker) agg. (p. 654) 

 Marginal vein of fore wing 1-55 to i-8 times as long as the stigmal vein 



(f. cincticornis) ..... teliformis (Walker) part. (p. 659) 



Mesopolobus morys (Walker) 



Pteromalus Morys Walker, 1848 : 125, 197, <$. 

 Disema pallipes Forster, 1878 : 54, (J. 

 Xenocrepis pura Mayr, 1904 : 584, o*- 



