PTEROMALIDAE OF N.W. EUROPE 759 



Fore and mid coxae partly testaceous. Head (Text-fig. 643) barely twice as broad as long. 

 Eyes rather smaller, separated by rather more than 1 5 times their length ; malar space longer, 

 fully half as long as an eye. Genae, as seen in frontal view, weakly concave just below the 

 eyes, then somewhat convex just above the oral fossa. Antennal scape as long as an eye, 

 reaching almost above the level of the vertex, broader than in female, about 4-5 times as long 

 as broad ; funicle not stout, proximally hardly as stout as the pedicellus, its first segment 

 distinctly shorter than the second segment and subtransverse, segments 2 and 3 quadrate, 4-6 

 very slightly transverse ; clava nearly three times as long as broad and fully as long as the three 

 preceding funicular segments together. Marginal vein hardly 1-5 times as long as the stigmal 

 vein. Gaster obtuse at apex, only about 1-3 times as long as broad, somewhat broader than 

 the thorax. 



Holotype $. England : Devon, Braunton, bred 17.viii.1929 from the puparium 

 of a Tachinid fly (possibly Tachina sorbillans Wied.) which had parasitized Philudoria 

 (=Odonestis) potatoria (L.) (G. C. Varley), in Hope Department, University Museum, 

 Oxford. 



Paratypes. Same data, 1 <£, 2 $, in Hope Department, University Museum, 

 Oxford. 



The female of potatoriae most resembles that of submarginatus (Thomson), from 

 which it differs in the characters mentioned in my key to species. 



The North American species cognatus Gahan also resembles potatoriae, but the 

 female differs from that of potatoriae as follows : antennal scape shorter, about 

 three quarters as long as an eye, and not nearly reaching the median ocellus ; eyes 

 slightly larger, separated by about 1 -2 times their length ; median area of propodeum 

 (Text-fig. 605) strongly transverse, about 17 times as broad as long ; sculpture of 

 mesoscutum and scutellum rather coarser. 



Eupteromalus lasiocampae sp. n. 



(Text-fig. 625) 



$. Head and thorax bright blue-green ; gaster sometimes tinged with bronze discally. 

 Mandibles, antennal scape, and pedicellus beneath, testaceous ; rest of antenna brown. Coxae 

 concolorous with thorax ; rest of legs testaceous, with the tips of the tarsi brown. Wings 

 hyaline, venation testaceous. Length 2-1-2-3 rnm. 



Head in dorsal view (Text-fig. 625) 205-2-1 times as broad as long ; temples slightly more 

 than one third as long as eyes, evenly rounded off ; eyes slightly prominent ; POL 1-2-1-3 

 OOL. Head in frontal view subtrapeziform with genae moderately buccate ; edges of oral 

 fossa, on either side of clypeus, hardly curved. Eyes separated by 1-4-1-55 times their length. 

 Malar space 0-45-0-5 the length of an eye. Both mandibles with 4 teeth. Anterior margin of 

 clypeus very slightly produced, the produced portion very shallowly emarginate, almost 

 truncate. Lower edge of antennal toruli distinctly above ventral edge of eyes ; scape slightly 

 shorter than an eye, but reaching or nearly reaching the vertex ; combined length of pedicellus 

 and flagellum distinctly less than breadth of head ; pedicellus in dorsal view about twice as long 

 as broad, distinctly longer than the first funicular segment ; flagellum stout ; funicle proxim- 

 ally much stouter than the pedicellus, its proximal segments quadrate, the sixth, and some- 

 times the fifth, very slightly transverse ; clava a little broader than the funicle, about twice as 

 long as broad, not quite as long as the three funicular segments together ; sensilla numerous, 

 in one row on each flagellar segment. 



Thorax about 1-5 times as long as broad. Pronotal collar distinctly but rather irregularly 



