1906.] NATURAL SCIENCES OF PHILADELPHIA. 379 



Spharagemon bolli Scudder. 



Knob Hill, Colorado Springs, Colorado, 7,000 feet, Aug. 17, 2 'd. 

 Manitou, Colorado, 6,900-7,000 feet, Aug. 23, 5 d", 3 ? . 



These specimens are not separable from New Jersej^ specimens of 

 the species. 



Very few specimens of this species were found on the prairie, but it 

 was quite common on a path leading through pine woods on the hills 

 above Manitou. 



Spharagemon coUare (Scudder). 



Billings, Yellowstone Co., Montana, Aug. 4, 1 c^. Colorado Springs, 

 Colorado, Aug. 17 and 18, 2 d^, 4 9 . Knob Hill, Colorado Springs, 

 Aug. 17-22, 14 c^, 37 9 . Roggen, Weld Co., Colorado, Aug. 24, 1 d". 



The specimen from Billings is assigned here with some doubt. One 

 of the most plentiful of the large species found on the prairie. 



Spharagemon collate angustipenne Morse. 



Salt Lake City, Utah, Aug. 13, 2 9 . 



The two individuals recorded here were taken in the stubble field 

 in which Dissosteira spurcata was abundant. This form appeared to be 

 quite scarce. 



DEROTMEMA Scudder. 

 Derotmema cupidineum Scudder. 



\\liitehall, Jefferson Co., Montana, Aug. 12, 1 c?. Grand Junction, 

 Mesa Co. , Colorado, Aug. 15, 4 d" , 3 9 . Antlers, Garfield Co. , Colorado , 

 Aug. 15, 9 d", 3 9. 



These specimens are slightly larger than the original measurements 

 given by Scudder, but otherwise fit the description quite well. The 

 species appears to be readily separable from D. haydeni by the slightly 

 longer and distinctly slenderer caudal femora. The pectinate char- 

 acter of the metazonal rugosities is not characteristic of haydeni, as 

 each of the above series contains specimens in that respect not differ- 

 ing from haydeni, but the femora show them to be cupidineum. The 

 Grand Junction specimens as a series are more suffused than the 

 Antlers individuals. 



The previous Colorado records of this species are from "\Aliite river, 

 near the Utah boundary, Montrose, Grand Junction and Palisades. 



The specimens taken at Grand Junction were captured on the re- 

 cently inundated silt along the bank of the Grand river where numer- 

 ous specimens were seen. Those from Antlers were captured on the 

 dry cactus and sage plain. 



