inhabiting the Arctic Region. 335 



the ulna ; cubitus more than half the length of the ulna ; stigma of 

 moderate size, emitting no branch. 



Female ? — Antennae piceous, subclavate, not longer than the tho- 

 rax ; first and second joints green ; fifth and following joints to the 

 tenth successively shorter and broader ; club elliptical, broader than 

 the tenth joint, and more than twice its length : abdomen oval, 

 deeply keeled beneath, much shorter than the thorax ; metapodeon 

 occupying less than one-fourth of the dorsum ; octoon shorter than 

 the metapodeon ; ennaton shorter than the octoon ; decaton still 

 shorter ; protelum as long as the decaton ; paratelum and telum short : 

 legs dark yellow; thighs mostly green ; tips of the tarsi fuscous. 



Alten. 



Lamprotatus Scaea, mas. Viridis, abdomine aeneo-vario, antennis 

 nigris, pedibus flavis fusco-cinctis, alis limpidis. (Corp. long, 

 lin. 1 ; alar. lin. 1 J.) 



Head and thorax convex, finely squameous : head dark bluish green, 

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

 longer than the thorax ; first joint long, slender ; second cyathiform ; 

 third and fourth very short ; fifth and following joints to the tenth 

 long, linear, successively decreasing in length ; club fusiform, much 

 more than twice the length of the tenth joint : thorax elliptical : pro- 

 thorax transverse, rounded in front, narrower than the mesothorax ; 

 its breadth much more than twice its length : scutum large ; par- 

 apsides prominent, their sutures very distinct ; axillae large, triangular, 

 approaching near to each other ; scutellum rhomboidal, having a 

 transverse suture near its hinder border ; metathorax transverse, very 

 short : propodeon obconic, decumbent : podeon stout, very short : 

 abdomen nearly linear, flat, aeneous-green, shining, smooth or co- 

 vered with very minute scales, shorter and narrower than the thorax ; 

 metapodeon occupying more than one-third of the dorsum ; octoon, 

 ennaton, decaton and protelum of moderate and nearly equal size ; 

 paratelum and telum short : sexual parts long, fuscous : legs yellow ; 

 coxae green ; thighs piceous, yellow towards their tips ; middle tarsi 

 and tips of middle and hind tibiae fuscous : wings limpid ; nervures 

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

 more than half the length of the humerus ; radius much longer than 

 the ulna ; cubitus more than half the length of the ulna ; stigma of 

 moderate size, emitting a short branch. 



Alten. 



Lamprotatus Leucon, fem. Cyaneo -viridis, antennis nigris, pedibus 

 fulvis , femoribus basifuscis aut viridibus, tar sis flavis, alis albis. 

 (Corp. long. lin. J ; alar. lin. 1£.) 



Body slender, bluish green : head and thorax convex, finely squa- 

 meous : head a little broader than the thorax : antennae black, cla- 

 vate, slender, as long as the thorax ; first joint green, long, slender ; 

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

 joints to the tenth successively shorter and broader ; club elliptical, 

 broader than the tenth joint, and more than twice its length : thorax 

 fusiform : prothorax transverse, short, much narrower in front ; its 



