242 EDWARD NORTON. 



Sec. in. — Margin of third abdominal segment hidentate. 

 Chrysis scitula Cresson, Proc. Ent. Soc. Phil, iv, 1865, .309. 

 Hab. — Colorado, (Coll. Am. Eat. Soc.) 



The two apical teeth are as near as the two middle teeth in the 

 4-deatate species; there are two very obtuse retracted outer angles 

 where the outer teeth would be. The face has no cross carina, the 

 basin is deep, punctured. The mesopleura below its middle is well 

 defined, narrow and produced to an acute angle. 



Sec. IV. — Margin of third abdominal segment tridentate. 

 Margin with three acute teeth ; the ante-marginal space wide, 

 smooth, with two or three large open pits and several round separate 

 pits. Postscutellum subconic, at the apex sublacerate. Segments of 

 tergum smooth, with large, round, deep, separated punctures of two 

 sizes upon first and third segments, smaller on second with minute 

 punctures between on the sides of all ; base of first segment with 

 three punctured basins the central deepest. An irregular carina 

 across the face below ocelli, with a carina at each end parallel with 

 eyes, which may be traced around the whole orbit. Females with a 

 third, small ventral plate protruded beyond the middle of second. 



Two carinse arising from the transverse carina. 



Not inclosing lower ocellus parv nla. 



Inclosing lower ocellus inucronata. 



Chrysis parvula Fabr., Syst. Piez. 176, 30, 1804; Dahlb., Hym. Eur. ii, 

 191, 103, % 9. 

 Chrysis carinata Say, Ann. Macl. Lye. i, 82, 2. 



Chrysis tridens Lep et Serv., Encyc. i, 405 ; (Pyria), Brulle, Hym. i v, 46, 34, J . 

 • Chrysis 3-dcntata Dahlb., Dispos. 1845, 16, 22. 



Chrysis virens Cress., Proc. Ent. Soc. Phil, iv, 309, 9 • 

 Hah.— Conn., N. Y., Del., Md., Va., 111., Fla., Miss., La., Col., 

 (Coll. Am. Ent. Soc.) Specimens difier greatly in color and size. 



Chrysis inucronata Brulle, Hym. iv, 1846, 48, 33, 9. 

 Hab. — Lower California, Mexico, (Coll. Am. Ent. Soc.) 

 S 9 . — Color a brilliant green and violet, with black-blue spots 

 upon the tergum, (not the bands which appear when the tergum is 

 bent). This is probably a variety of C. parvula. 

 (The 4- and 6-dentate species not studied). 



