NORTH AMERICAN HYMENOPTERA. 



221 



HEDYC'IIRIDllIM Abeille de Perrin. 

 Ann. Soc. Linn, de Lyon, 26, p. 35, 1879. 

 Between Holopijgn and Ihdychrum on account of the punctured area 

 below postscutellum and the somewhat intermediate character of the 

 teeth of the tarsal claws, viz. : one small tooth in the middle of claw ; 

 punctures, appearance, etc., much as in these two allied genera. 

 A triangular punctured area below the postscutellum ending in a short median 

 ridee, foveolse on each side diagonal. 

 Pro- and mesothorax with close punctures, all of about equal and medium size; 

 postscutellum continuing into the area and not divided from it except by a 

 blight projection. As viewed laterally the apex of the second segment is 

 raised considerably above the base of the third segment...«liniidiatum. 

 Pro- and mesothorax with close fine punctures interspersed with sparse, large, 

 shallow punctures; postscutellum somewhat divided by its margin from 

 the area. As viewed laterally the apex of the second segment is^ nearly 



even with the base of the third. Viride. 



Postscutellum connected directly with a median ridge on the metanotum ; foveols 

 on each side transverse, striated cseruleum. 



Hedjcliridiiim dimidiatiim. 



Hedijckrxim dimidlatam Say, Long's second expedition ii, 331, 1824; Nor- 

 ton, Trans. Am. Ent. Soc. vii, 237. 

 Thirteen specimens from Delaware, Illinois, Virginia, Colorado, So. 

 California, Montana and Washington Territory. The five Eastern speci- 

 mens all have a decided bluish shade, with as much green and some pur- 

 ple reflections. The Western specimens have a decided green color with 

 less blue and some purple ; dorsum of abdomen in some specimens dull 

 blackish, purple, the same shade of color as across the extreme base of 

 the segments beneath the overlaping of the preceding segments. One 

 specimen is entirely emerald-green with brassy reflections, no blue, and 

 a touch of golden on the scutellum. On the metanotum, below and 

 contisuous to the postscutellum, a small, trianaular, punctured area, 

 pointed below and continuing into a median ridge above the extreme 

 base of the abdomen. On each side of this triangular, punctured area 

 are long, shallow, diagonal foveolae, roughened, or with substriae, and 

 generally of a darker color. 



Hedycliridiiini viride. 



Hed,,chrum viride Gv<,sson,Vroc. Ent. Soc. Phila., iv, 306, 1865 ; Norton, 



Trans. Am. Ent. Soc. vii, 238. 



Thirty-nine specimens from Colorado (the types), Montana, Dakota, 



Washington Territory, Cahfornia and Utah. The color is generally 



emerald-green with brassy reflections ; in some specimens the abdomen is 



darker wkh blue reflections, in others the blue is predominating with 



