SCIENTIFIC EXPEDITION TO NORTHEASTERN COLORADO 1 59 



Planorbis hicarinatus Say 

 Planorbis parvus Say 

 Planorbis trivolvis Say 

 Physa gyrina Say 

 Ancylus caurinus Cooper 



Results of this collection are recorded in the articles on "The Mol- 

 lusca of Colorado" which are published in this and the preceding num- 

 ber of these Studies. 



6. List of Mammals Collected or Noted 



By Harvey Markman 



The following list includes the mammals collected or carefully noted 

 on the trip. It was found difficult to obtain collections partly owing to 

 the scarcity of mammals and partly because of lack of time. Besides 

 the following a small rodent was collected at Trilby which seems to be 

 a vole, but the specimen was partly eaten while still in the trap and 

 identification is difficult. 



White-footed mouse. St. Vrain. 



Yellow pocket gopher. Common at Loveland. 



Cottontail. Trilby; Davis' Ranch. 



Coyote. Fossil Creek. 



Skunk. Fossil Creek. 



Badger. Fossil Creek. 



Prairie dog. Trilby; Grover, etc. 



White-tailed jack rabbit. Trilby. 



Thirteen-striped gopher. Trilby; Grover, etc. 



Packrat. Davis' Ranch. 



7. Note on the Butterflies of the Genus Neominois 



By T. D. A. COCKERELL 



The genus Neominois (family Satyridae) is credited in our lists with 

 two species, N. ridingsii Edwards, 1865, and N. dionysius Scudder, 

 1878. Several specimens were obtained by the University of Colorado 

 expedition of 1906 ten miles east of Grover, in Weld Co., Colorado, 

 June 29. I had assumed that these were the common N. ridingsii, but 

 Mr. S. A. Rohwer pointed out to me that they showed certain resem- 

 blances to N. dionysius — in their cinereous color, with the basal area of 



