Mr. P. Walker on some Chalcidites of North America. 15 



mesothorax long ; sutures of the parapsides distinct, approaching each 

 other ; axillae large, triangular, not conniving; scutellum nearly rhom- 

 boidal : metathorax cupreous, transverse, very short : propodeon cu- 

 preous, large, subquadrate, almost horizontal, having a few little ridges 

 along the middle : podeon extremely short : abdomen elliptical, pur- 

 ple, very minutely squameous, varied with green on each side, nearly 

 as long and as broad as the thorax ; metapodeon occupying more than 

 one- third of the dorsum, slightly dehiscent on the middle of the hind 

 border, having a little channel at the base ; octoon a little shorter 

 than the metapodeon ; ennaton much shorter than the octoon ; de- 

 caton still shorter ; protelum, paratelum and telum very short : seg- 

 ments of the thorax beneath partly cupreous, very minutely squa- 

 meous, having a suture along the middle : ventral segments of the 

 abdomen concealed by those of the dorsum : sheaths of the oviduct 

 black, pubescent, a little longer than the abdomen : legs pale red ; 

 coxae green, scaly : wings slightly tinged with yellow ; nervures ful- 

 vous ; humerus much less than half the length of the wing ; ulna 

 much shorter than the humerus; radius much shorter than one- 

 fourth of the length of the ulna ; cubitus not half the length of the 

 radius ; stigma of moderate size, emitting a thick branch towards 

 the tip of the radius. 



Callimome Cecidomyae, fern. Aureo-viridis, antennis nigris, pedibus 

 flavis viridi etfusco vittatis, alis Umpidis. (Corp. long. lin. 1^; 

 alar. lin. 2.) 



Body bright golden-green, convex : head and thorax finely squa- 

 meous, the scales on the head and on the fore part of the thorax so 

 disposed as to form little transverse undulations : head as broad as 

 the thorax : antennae black, subclavate, pubescent, shorter than the 

 thorax ; first joint long, slender, green, fulvous at the base ; second 

 cyathiform ; third and fourth very minute; fifth and following joints 

 to the eleventh successively but very slightly shorter and broader ; 

 club linear, conical at the tip, a little broader than the eleventh joint 

 and more than twice its length : thorax elliptical : prothorax trans- 

 verse, narrower in front, its breadth more than twice its length : 

 scutum of the mesothorax long ; sutures of the parapsides distinct, 

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

 scutellum somewhat rhomboidal : metathorax transverse, very short : 

 propodeon transverse, rather short, very slightly decumbent : podeon 

 extremely short : abdomen fusiform, smooth, shining, narrower, but 

 not longer than the thorax, blue towards the base ; the segments, 

 excepting the metapodeon, very minutely squameous ; metapodeon 

 occupying less than one-third of the dorsum, slightly dehiscent 

 on the middle of the hind border ; octoon and ennaton of moderate 

 length; decaton longer than the ennaton; protelum shorter than 

 the ennaton ; paratelum still shorter ; telum very short : sheaths of 

 the oviduct black, pubescent, much longer than the abdomen : legs 

 yellow ; coxae green ; a longitudinal stripe of green on each of the 

 metafemora, and the same of fuscous on each metatibia ; mesotarsi 

 and metatarsi straw-colour, fuscous at the tips : wings limpid, broad, 



