2l6 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



its usual habitat. Perhaps graminea has less right to a name than 

 audubonii ; for while the latter seems almost entitled to specific rank, 

 always distinct in color and habits from the other varieties, ^r<7;«/;z<f^ 

 with me is alwa)s found yi\\.\\ purpurea, has the same habits and grad- 

 ,ually shades off in color to and from the type." C. cimarrona Lee, 

 is a form apparently confined to the Rocky Mountain region in Col- 

 orado and New Mexico. Prof. Popenoe tells me that it occurs singly 

 on bare clay soils about open prairies in South Park, Colorado. The 

 variety decemnotata Say, is more widely scattered. Dr. Williston 

 writes that it has habits somewhat similar to those of montana, being 

 specially distributed in southern Wyoming on high grounds among 

 the buffalo grass. Mr. Oslar informs me that he finds it abundant on 

 certain lots in Denver, April 15th. In the foot-hills he gets it occa- 

 sionally, later in the season. However, the specimens sent me prove 

 to be denverensis Casey, which must belong with the aggregate now 

 ranking as varieties of purpurea. The variety limbalis Klug, is quite 

 abundant at Iowa City, chiefly on steep, bare banks (whether of sand 

 or clay) by roadsides. It appears with the. first warm days of spring 

 and is more readily captured than most of our tigers. In Colorado, 

 Mr. Oslar finds it in the dry bed of Cherry Creek near Denver. It 

 appears there the first week in April. The names spreta Lee, and 

 amana Lee, are applied to forms which I have never seen and regard- 

 ing whose occurrence I can get no information. That called splen- 

 dida Hentz, is more or less abundant in Kansas. Prof. Popenoe took 

 it in Riley and Shawnee Counties, in February, March, April and 

 September on dry clay banks exposed to the sun, along roadsides or 

 in gullies through the prairies. It is rather plentiful but straggling in 

 its occurrence. Mr. Knaus has it from various localities in eastern 

 and central Kansas, where he finds it on sandy or clayey roads, some- 

 times as late as October. My personal acquaintance with the species, 

 in life, is limited. I took it in June on a sandy lot in Denver, in 

 company with the next species. 



C. formosa Say. The red western type form is sometimes quite 

 abundant on dry, open, sandy spots, among short grass and weeds, not 

 in the immediate vicinity of water. It also frequents sandy roads in 

 company with scutellaris. Wary and difficult of capture, though so 

 conspicuous. Flight strong, often sustained. I have met with it at 

 Canon City, Colorado, in May, and at Denver in June and July. Mr. 

 Oslar takes it at many localities in Colorado, about the foot-hills and 



