inhabiting the Arctic Region. 341 



boidal : metathorax very short : propodeon transverse, short, decum- 

 bent : podeon extremely short : abdomen a little longer than broad, 

 smooth, shining, flat above, slightly keeled beneath, shorter and 

 broader than the thorax ; metapodeon occupying rather more than 

 one- third of the dorsum ; octoon not more than half the length of 

 the metapodeon; ennaton shorter than the octoon; decaton still 

 shorter ; protelum as long as the decaton ; paratelum and telum very 

 short : legs fulvous ; coxae and thighs green ; tarsi yellow, their tips 

 fuscous : wings very slightly tinged with brown ; nervures fulvous ; 

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

 more than half the length of the humerus ; radius a little shorter 

 than the ulna ; cubitus very nearly as long as the radius ; stigma 

 very minute, emitting a short branch. 

 Alten. 



Pteromalus Rhinthon, fem. Cyaneus, antennis piceis, pedibus ful- 

 vis , femoribus viridibus, tibiis fusco-cinctis, alts limpidis. (Corp. 

 long. lin. 1^; alar. lin. 2.) 



Body dark blue : head and thorax convex, squameous : head 

 hardly broader than the thorax : antennae dark piceous, clavate, 

 shorter than the thorax ; first and second joints dark blue ; first 

 joint long, slender ; second cyathiform ; third and fourth very mi- 

 nute ; fifth and following joints to the tenth successively but very 

 slightly increasing in breadth and decreasing in length ; club coni- 

 cal, twice the length of the tenth joint : thorax oval : pro thorax very 

 short, its length not equal to one-fourth of its breadth : scutum of 

 the mesothorax broad ; sutures of the parapsides very indistinct ; 

 axillae large, triangular ; scutellum rhomboidal, prominent : meta- 

 thorax transverse, very short : propodeon obconic, decumbent : po- 

 deon extremely short : abdomen elliptical, smooth, shining, attenu- 

 ated towards the tip, concave above, slightly keeled beneath, a little 

 narrower and longer than the thorax ; metapodeon of moderate size ; 

 octoon short; ennaton and the following segments longer: legs 

 fulvous ; coxae and thighs blue ; tibiae fuscous, their tips fulvous : 

 wings limpid ; nervures fulvous ; humerus much less than half the 

 length of the wing ; ulna not half the length of the humerus ; radius 

 longer than the ulna ; cubitus a little shorter than the ulna ; stigma 

 small, emitting a short branch. 



Isle of Soroe, Finmark. 



Pteromalus Mazaces, mas. Viridis, abdomine bast fulvo, antennis 

 fuscis, pedibus flavis, alis subfulvis. (Corp. long. lin. 1 ; alar, 

 lin. If.) 



Body dark green : head and thorax convex, finely squameous : 

 head a little broader than the thorax : antennae fuscous, subclavate, 

 as long as the thorax ; first and second joints fulvous ; first joint long, 

 slender ; second cyathiform ; third and fourth very minute ; fifth and 

 following joints to the tenth successively shorter and broader ; club 

 conical, more than twice the length of the tenth joint : thorax oval : 



