Mr. F. Walker on some British Chalcidites. 21 



Eurytoma Micipsa, mas. Atra, convexa, minime gibbosa, antennis 

 pedibusque nigris, genubus rufis, tarsis piceis, alls subfuscis. 

 (Corp. long. lin. 1 ; alar. lin. 1|.) 



Body convex : head and thorax roughly punctured : head a little 

 broader than the thorax : antennfe slender, setaceous, longer than 

 the thorax ; joints from the fifth to the ninth elliptical, hardly di- 

 lated, joined together by slender stalks about half the length of 

 each joint : thorax somewhat obconical, less convex than that of 

 iierticillata, Serratulcs, rvfipes, tumida and platyptera : prothorax qua- 

 drate ; its breadth more than twice its length : scutum of the meso- 

 thorax broader than long; sutures of the parapsides distinct, ap- 

 proaching each other ; axillae large, triangular, not conniving ; 

 scutellum somewhat conical, truncate in front, not falling behind 

 so deep as in the species above-mentioned : metathorax trans- 

 verse, very short : propodeon large, obconic, more horizontal than 

 in the following species, verticillata, SerratuleE, curta, Abrotani, 

 annulipes, rufipes, Scultenna and Sittace, and having only one broad 

 shallow channel along the middle : podeon cylindrical, slender, dull, 

 punctured, as long as the propodeon : abdomen oval, smooth, shining, 

 compressed, abruptly decumbent at the base and towards the tip, 

 little more than half the length of the thorax ; its height is not equal 

 to its length ; metapodeon less than one -third of the length of the 

 abdomen, decumbent in front ; octoon of moderate size ; ennaton 

 large ; decaton of moderate size ; protelum, paratelum and telum very 

 short : wings moderate ; humerus much less than half the length of 

 the wing ; ulna rather thick, less than half the length of the hume- 

 rus ; radius much shorter than the ulna ; cubitus as long as the radius ; 

 stigma small, emitting a short branch. 



Isosoma Nepe, mas. Atrum, prothoraci macula utrinque fulva, 

 antennis pedibusque 7iigris, genubus rufis, tarsis piceis, alis sub- 

 fuscis , nervis piceis . (Corp. long. lin. 1 ; alar. lin. 1^.) 



Body black, convex, cylindrical : head and thorax punctured : 

 head a little broader than the thorax : antennae slender, filiform, 

 clothed with long hairs, somewhat shorter than the thorax ; first 

 joint slightly bent, dilated beneath; second short-cyathiform ; third 

 and fourth very minute ; fifth and following joints to the eleventh 

 long, cylindrical, nearly equal in size, or successively, yet very 

 slightly, shorter and broader ; tip of the eleventh joint pointed : pro- 

 thorax very finely rugulose, somewhat shining, rather broader than 

 long, a little shorter and more slender than that of /. vacillans, from 

 which it differs also in having a smaller pale fulvous spot on each 

 fore-corner: mesothorax dull; sutures of the parapsides very distinct, 

 approaching each other ; axillae large, triangular, not conniving ; 

 scutellum obconic, having a rim round its hind border which is more 

 obtuse than that of /. longulum, petiolatum, and hyalipenne : meta- 

 thorax transverse, very short : propodeon dull, obconic, decumbent, 

 coarsely punctured, and having here and there some large shallow 

 excavations : podeon long, stout, cylindrical, dull, punctured : abdo- 



