48 



8« Species of incdiuin size; last segment short; anal cerci 

 much narrower in distal than in basal half, several times longer 



than the mean width M. femur-rubram. 



Species minute; last segment of abdomen produced at the 

 tip; anal cerci subetpial, rounded at the tip, scarcely twice as 

 long as the mean width M. Kenmcotlii. 



Concerning the synonymy of these species, it may be remarked 

 that the. name under which I described Cal. fascialus ^ being preoc- 

 cupied, I have thought it most appropriate to apply to the species the 

 name of one of the members of the national Entomological Com- 

 mission, who has done the most to extend our knowledge of the 

 Melanopli of the extreme west. Walker's species are, in nearly 

 every instance, described from females only, and characters used 

 which apply equally well to nearly every species, so that it will be 

 long before we know what they are ; it would appear probable, how- 

 ever, that his Cal. bUiluratus is Riley's Cal. atlanlis, and his Cal. 

 scrlplus DeGeer's Acrid, femur-rubrum. As to tlTe former, the dis- 

 covery of the wide extent of its range, combined with its other 

 features, satisfy me that it must be separated from M. spretus (Uhl.) 

 as Riley claims, although there ai*e few differences between the two 

 besides length of wing and of anal cerci; while both differ to so 

 much greater a degree from M. femur-rubrum that it is not a little 

 strange that INIr. Riley should have so persistently endeavored to 

 show how M. nflantls should be distinguished from M. femur-rubrum, 

 rather than from M. spretus. 



Of the species here named for the first time, and of which we 

 shall give full descriptions in a future paper, M. collarls is a species 

 which cannot possibly be confounded with any other. It is brightly 

 colored, with blue hind tibite, a body mucii brighter yellow than 

 usual, the antenuas very light yellow, and the fi-ont edge of the pro- 

 notuui with a narrow yellow rim. Tiie sternal spine is pointed, and 

 the front division of the pronotmn sliglitly swollen. M. devastator, 

 but for its anal cerci, would appear to be more closely allied to M. 

 spretus than M. atlantls is. The wings vary greatly in length, some- 

 times nearly equalling those of M. spretus, at other times but slightly 

 surpassing the abdomen. The hind tibia2 are usually red, although 

 of not so deep a color as in M. atlantls ; but Dr. Packard brought 

 specimens from Shasta Valley and Sissons, (j'al., in which they are 



iProc. Bost. Soc. Nat. Hist., xvir, 477. 



