212 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Fuchs writing that he has the type from Placer County, California. It 

 was taken in August. The black form called inontana Lee, seems 

 much more entitled to specific rank ; it is to be taken on alkaline 

 flats among scant vegetation near Laramie, Wyoming. Prof. Bruner 

 sent me some that he got at Pocatello, Idaho. My observations at 

 Laramie go to show that it is not an abundant species but rather easy 

 of capture as it runs about on the scantily covered surface of the flat. 

 Dr. Williston took it at various localities in southern Wyoming early 

 in spring, more frequently along hillsides and not especially on bared 

 ground. 



C. scutellaris Say. This extremely variable species is partial to dry 

 sandy spots where there is comparatively little vegetation. The type 

 form I have taken in Colorado (at Canon City and Denver) on open 

 sandy fiats not in the immediate vicin'ty of water. In the latter 

 locality I found it on vacant lots within the city limits during the 

 month of June. The Canon City specimens were found about the 

 middle of May. Mr. Ernest J. Oslar writes that he has found it 

 among the foot-liills at the mouth of Bear Creek Canon, Jefferson 

 County. Colorado, from April 15 to May 10. The flight is rather 

 weak and slow. The form unicolor Dej., was seen in abundance by 

 Mr. Soltau in sandy roads and dry runs at Spring Hill, a suburb of 

 Mobile, Alabama, occurring early in spring and again late in the fall. 

 Mrs. A. T. Slosson observed it flying and lighting in sandy paths 

 through the scrul) of Florida. Mr. Os'ar reports it from the same 

 localities as cited above for his captures o^ scutellaris znd. adds Boulder 

 County, Colorado. He finds it double brooded, the first occurring 

 from April 25 to May 30, the second in September, not uncommon, 

 but hard to catch. The black form with lateral spots, niodesta Dej., 

 has been found in the vicinity of New York City. " Flies on sand 

 dunes from April, when the first brood appears. Rare during the 

 summer, more abundant on the apj^earance of the second brood in the 

 fall" (Davis). Mr. Johnson writes, "First brood in June. Occurs 

 on sandy s])ots where grass and weeds are frequent, not on bare sand 

 hills." Mr. Kemp takes it in a variety of situations near Clementon, 

 Woodbury and Westville, New Jersey, where it is locally abundant on 

 sandy paths by edges of woods, and also rn open fields. C. nigrior 

 Dej., in which the lateral spots are wanting, was taken by Mr. John- 

 son in company with tnodesta. Mr. Soltau reports it with unicolor 

 from Spring Hill, Alabama. The green and spotted tugifrons Dej., 



