Feb., '06] ENTOMOLOGICAL NEWS. 45 



4. In the arid and semi-arid regions of the middle west, 

 from New Mexico through Colorado, eastern Montana, Kan- 

 sas, Nebraska, Dakota, Manitoba, Assiniboia and Alberta, we 

 find a better marked race of (usually) rather distinctly metal- 

 lic tipper surface, with broad markings, the humeral lunule 

 complete and the middle band frequently expanded on the 

 margin. This is obliquata Kirby, and is so recognized by Mr. 

 Leng. It is, however, not very well differentiated, a great 

 number of the specimens being about equally well referable to 

 obliqnata or to horiconensis . Others run into vibex. Dr. Horn 

 sinks it as a synonym, and I am disposed to agree with him 

 in this course, recognizing, however, that obliquata is much 

 more worthy of being retained than is horiconensis. The ex- 

 treme specimens are very different-looking from the eastern 

 tranquebarica. 



5. In specimens from the western edge of the ordinary 

 range of the above form, we find a well-marked tendency to 

 partial obliteration of the humeral lunule. As a rule, this is 

 accompanied by a preponderance of the greenish cast in the 

 coloring of the upper surface, until in some portions of the 

 Pacific district and the adjacent interior basin the coppery 

 color is almost entirely replaced by a brilliant green. These 

 green forms have thus been classified by Mr. Leng, in his 

 Revision : 



Bright green, humeral lunule broken . . vibex Horn. 

 Brilliant blue-green, humeral lunule lacking . sierra Leng. 

 Dull green, humeral lunule broken . . rogitensis Harris. 

 All of these forms are well represented in the material be- 

 fore me, but I do not agree with Mr. Leng in his assignment 

 of names. The types of Mr. Harris' C. roguensis were from a 

 locality distant but fifty or sixty miles from that of the type of 

 vibex and some specimens of the first named (in my collection) 

 from the Rogue River might well be called rather bright green, 

 though in general they are somewhat dull. I think the name 

 roguensis should sink as a true synonym of rv7v .1 , the distinc- 

 tion being merely the evanescent one of depth or brilliance in 

 color. In fact, so I am told by Dr. Walther Horn, the type 

 of vibex is not of the brilliant green of the San Bernardino Co, 



