226 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.41. 



Nomadula Cockerell, 1903. 



Type. — iV. articulata (americana auctt.). Antennae of male peculiar. Includes 

 also N. martinella, scita, scitiformis, erythrochroa, and sophiarum. 

 Melanomada Cockerell, 1903. 



Type. — N. grindelise. Male entirely black, female with red abdomen. 



I can not distinguish Cephen from Micronomada. 



TABLES. 



(1) Cockerell, Bull. 94, Colo. Agric. Exp. Sta., pp. 70-75. (Dated December, 1904, 



but published early in February, 1905: Species of Rocky Mountains.) 



(2) Cockerell, Bull. 94, Colo. Agric. Exp. Sta., p. 82. (Allies of N. pallidella.) 



(3) Cockerell, Bull. 94, Colo. Agric. Exp. Sta., p. 84. (Allies of N. coloradensis .) 



(4) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 559-561. (Species of Cali- 



fornia.) 



(5) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 580-582. (Xanthidium and 



Holonomada .) 



(6) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, p. 589. (Red species.) 



(7) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, p. 591. {Centrias and Nomadula.) 



(8) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, p. 593. 



(9) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 594-596. (Gnathias.) 



(10) Cockerell, Proc. Acad. Nat. Sci. Phila., 1903, pp. 608-610. (Micronomada and 



Centrias.) 



(11) Cockerell, Univ. of Colorado Studies, vol. 4 (1907), pp. 247-248. 



(12) Robertson, Canadian Entomologist, June, 1903, pp. 173-179. 



LIST OF SPECIES. 



* acccpia Cresson, 1878. "Colorado, Kansas (Snow, male, Morrison, female)." Tab.l. 

 adducta Cresson, 1878. Colorado (Morrison). Tab. 1. 

 *affabilis Cresson, 1878. "New York; Illinois." Tab. 5, 12. 



* affabilis dallasensis Cockerell, 1911. Dallt^s, Texas (Crawford and Pratt). Subg. 

 Holonomada. 



Type.— Cat. No. 13434, U.S.N.M. 

 agynia Cockerell, 1905. Golden, Colorado, July (Gillette). Tab. 1. 

 * albofasciata Smith, 1879. Canada. Tab. 1, 9. 



Notes on type; Trans. Amer. Ent. Soc, vol. 31, p. 312. Subg. Gnathias. 



Distribution in U. S.; Proc. Acad. Nat. Sci. Phila., 1903, p. 602. 

 alpha Cockerell, 1905. Fort Collins, Colorado, May 20 (Bishopp). Tab. 1. 



* americana Kirby, 1837. Hudson Bay. 



Confusion as to identity. See Trans. Amer. Ent. Soc, vol. 31, p. 310. 

 amoena Cresson, 1863. Rock Island, Illinois. 



Viereck reports that the type is not in Philadelphia. 



* angelarum Cockerell, 1903. Los Angeles County, California (Coquillett). Tab. 4. 



Type.— Cat. No. 13158, U.S.N.M. 

 annulata Smith, 1854. "North America" (Murchison). 



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

 antonita Cockerell, 1909. Antonito, Colorado. 



*aquilarum Cockerell, 1903. South Fork of Eagle Creek, New Mexico (Townsend). 

 Tab. 1. 

 Visits Erigeron in August. 

 Type.— Cat. No. 13183, U.S.N.M. 

 *arizonica Cockerell, 1911. Arizona (Carl F. Baker). Subgen. Xanthidium. 



Type.— Cat. No. 14024, U.S.N.M. 

 armata Herrich-Schaepfer, 1839. Europe. 



Nova Scotia. Female with head and thorax black; anterior margin of clypeus 

 ferruginous; thorax marked with ferruginous; abdomen ferruginous, base black, 

 second segment with an oval yellow spot on each side. Labrum of male armed 

 with a sharp tooth in the middle. 



