236 EDWARD NORTON. 



notch in the middle, with a very obtuse angulation on each side. 

 The basin of face has cross striae ; btisin of first segment of tergum 

 polished, punctures of first and second segments of two sizes, sepa- 

 rated, more dense and equal on the third segment. The wing scale 

 is purplish. The first tarsal joint green or with greenish reflections 

 above ; claws with three or four inner teeth. Wings sometimes 

 obscure, but generally with a well defined obscure apical half. 



HEDYCHRIJII Latr. 



Mandibles at the apes bidentate ; apical tooth curved, narrow ; 

 inner tooth very short, broad, not deeply notched. Head often concave 

 behind, fitting closely upon the prothorax ; summit of the basin of 

 face without cross carina; external angles of the face very acute, not 

 preceded by a fissure as in Chrysis. Claws of the tarsi bifid or with 

 one inner tooth. 



The males show three ventral segments, the females generally 

 show a narrow fourth segment connected with the oviduct. The 

 hinder femora of the males are often thickly covered before with 

 whitish pile. 



Tabular synopsis of the species. 



A punctured area between the postscutellum and the dividing ridge of the 

 metathorax. 

 Claws bifid or with a strong inner tooth near the tip. 

 Basin of face polished at sides and summit, with cross strise in the middle. 

 Pro- and mesothorax and tergum polished, punctures minute, sparse. 

 Back of the head concave, its upper edge acute, fitting closely to the 



thorax obsoletnm. 



Basin of face with cross striae. 

 Pro- and mesothorax punctured. 

 Tergum polished, punctures moderate, separated, base and apex of 



each segment smooth; back of head not concave Wiltii. 



Tergum closely punctured, back of head concave, fitting closely to 

 thorax. 



Thorax brightly cupreous above ciipricolle. 



Thorax green and violet above. 



Apical segment not emarginate vernale. 



Apical segment emarginate cyani ventre. 



Claws with a feeble inner tooth. 



Basin of face punctured at sides, striate across the middle. 



Tergum thickly covered with moderate punctures, margin of the third 

 abdominal segment lightly sinuate, neither notched nor angu- 



late <Iimi<liatuui. 



Basin of face punctured, a slender polished space down the middle. 



Tergum polished, punctures minute, scattered; third abdominal segment 

 pinched at sides, margin subconical viride. 



