234 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



*schwarz% Cockerell, 1903. Veta Pass, Colorado, June 28. Tab. 1, 9. Subg. 

 Gnathias. 



Allied to N. bella and cuneata. 



Type.— Cat. No. 13164, U.S.N.M. 

 *schivarzi contractula Cockerell, 1903. Beulah, New Mexico (Cockerell). Tab. 1, 9. 

 Subg. Gnathias. 



Type.— Cat. No. 13134, U.S.N.M. 

 *sdta Cresson, 1878. Colorado (Morrison). Tab. 7, 8, 10. 



Related to N. articulata. 

 *scitiformis Cockerell, 1903. Corvallis, Oregon, June (Cordley). Tab. 7, 10. 



Paratype.— Cat. No. 13160, U.S.N.M. 

 *semiscita Cockerell, 1904. Prospect Lake, Colorado Springs, Colorado, May 22 

 (T. and W. Cockerell). 



Allied to N. scitiformis. 

 *semisuavis Cockerell, 1910. Wawawi, Washington (W. M. Mann). Subg. Micro- 

 noviada. 



Female: Cockerell, Proc. U. S. Nat. Mus., vol. 39, 1911, p. 658. Also in California 

 *sidsefloris Cockerell, 1898. Mesilla, New Mexico (Cockerell). Tab. 1. 



Described as a variety of N. pennigera. 



Type.— Cat. No. 5821, U.S.N.M. 

 simplex Robertson, 1902. Illinois. Tab. 2, 12. 



In 1897 Robertson recorded this as the female of N. bella. 

 skinneri Cockerell, 1908. Lehigh Gap, Pennsylvania, June 30 (Viereck). 



Group of N. depressa. 

 *snowii Cresson, 1878. Colorado (F. II. Snow, Morrison). Tab. 1, 10. 



Female with clypeus ferruginous, lateral face-marks white. 

 *sophiarum Cockerell, 1903. Mesilla Park, New Mexico, April 16 (Cockerell). 

 Tab. 1, 8, 10. 



Type.— Cat. No. 13182, U.S.N.M. 

 sphxrogasier Cockerell, 1903. Riverton, New Jersey, April (Viereck). 

 *suavis Cresson, 1878. "California (Behrens); Oregon (H. Edwards)." Tab. 8. 

 *subaccepta Cockerell, 1907. Florissant, Colorado (Rohwer). Subg. Gnathias. 



In Tab. 1 runs to N. vicinalis, but differs (male) by its smaller size, base of 

 metathorax with distinct though delicate longitudinal ridges, absence of yellow 

 on first abdominal segment, etc. 



Paratype.— Cat. No. 13667, U.S.N.M. 

 *subangusta Cockerell, 1903. S. California. Tab. 4. 



Type.— Cat. No. 13163, U.S.N.M. 

 subgracilis Cockerell, 1903. California. Tab. 4. 



Belongs to subgenus Phor. 

 subrutila Lovell and Cockerell, 1905. Maine (Lovell). Tab. 11. 



Also in Colorado. See Ann. and Mag. Nat. Hist., July, 1906, p. 69. 

 *subsiinilis Cockerell, 1903. Los Angeles County, California, Feb. (Coquillett). 

 Tab. 4. 



Perhaps a subspecies of N. civilis. 



Type.— Cat. No. 13178, U.S.N.M. 

 *subvicinalis Cockerell, 1903. S. California. Tab. 4. 



Type.— Cat. No. 13169, U.S.N.M. 

 suda Cresson, 1879. Nevada (Morrison). 

 sulphurata Smith, 1854. Georgia. Tab. 5. 



Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 311. 

 *supcrba Cresson, 1863. Pike's Peak, Colorado. Tab. 1, 12. 

 *taraxacella Cockerell, 1903. Placita, New Mexico (Cockerell). Tab. 1. 



Allied to N. ultima. 



