236 8. FRANK AARON. 



Chrysis vennsta Cresson, Proc. Ent. Soc. Phila. iv, 311, 1865. 

 Three specimens in the collection from Colorado (the type), Arizona 

 and Texas. One specimen with the first abdominal segment partly and 

 the second with all but a narrow space on the posterior margin showing 

 black, with a faint tinge of purple; the teeth vary; plate ix, fig, 61, 

 illustrates the type specimens, while another specimen has the median 

 teeth closer together than those figured ; 6-8 mm. 9 . 



Chrysis nitidula Fabr., Ent. Syst. ii, M3, 21, 1793; Dahlbom, Hym. Eur. 

 ii, 214. 



Twenty specimens in the collection from the following localities : 

 Massachusetts, Pennsylvania, Delaware, Lake Superior region, Canada, 

 in the collection of M. Provancher. The general color is blue with 

 green reflections and some purple. Two specimens have the head and 

 thorax emerald-green with very little blue and the abdomen blue only on 

 the first and second segments. All the specimens but those from Oregon 

 (Mt. Hood) have cupreous, scarlet, golden and green reflections (in ap- 

 pearance like the colors of the spectrum) in a line, bordering the poste- 

 rior margin of the anterior area of the third segment, just above the 

 pits. A variety, represented by two specimens have Colorado, has the 

 entire third segment uniformly cupreous with a dull, even purple tint. 

 A specimen from Massachusetts has this color distinct only in certain 

 lights ; in other lights the segment is green or blue. The specimens 

 from Mt. Hood, Oregon, have also the margin directly above the pits a 

 little swollen or lobed in the extreme middle, and though the form of the 

 apical teeth are the same it may be a distinct species. Head, thorax and 

 abdomen for the most part densely punctured, the punctures finest on the 

 third segment, largest on the metathorax and the first abdominal seg- 

 ment, separated on the sides of the first segment and the apical portion 

 of the second. Pits medium, distinct, contained in a moderately strong 

 groove, ending nearer the base of segment. Apical teeth seem to be 

 quite constant in form and relative distance. The central emargination, 

 as shown in the figure, is broader and less profound than the lateral ones. 

 ^ 9- 



Chrysis coernlans Fabr., Piez. 173, 1804; Dahlbom. Hym. Eur. ii, 212, pi. 

 xi, 110; Radoskovsky, Horse Soc. Ent. Ross, iii, 305, pi. iv, fig. 19. 

 Chriysis nitidula Brull^, Nat. Hist. Ins. Hym. iv, 38. 

 Chrysis coerulans (Lep.) Brulld, loc. cit. 37. 

 Chrysis bella Cresson, Proc. Ent. Soc. Phila. iv, 312, 1865. 

 The collection contains forty specimens, all of which, after careful ex- 

 amination, I have decided to place with this species. The localities are 

 Canada, Maine, Massachusetts, New Jersey, Delaware, Virginia, North 



