608 Bulletin American Museum of Natural Hvttori/ [Vol. XLII 



nigra. See himaculala. 



nigricomis. See Tetralonia. 



nign'frons. See Diadasia. 



nigripes Smith, 1854, p. 311. 9 . United States. For his cT, see cnici. 



Provancher, 1888, p. 300. Cap Rouge, Ottawa, Canada. 



Synhalonia nigripea Robertson, 1895, p. 126. 



Dalla Torre, 1896, p. 231, makes it a synonym of despoiisa Smith. 



Rolxirtson, 1900, p. 53, considers that Smith's, 1854, p. 311, 9 (not cf ) 

 Emphor bombiformis belongs here. 



Smith, 1910, p. 093. Newark, New Brunswick, Jamesburg, Lahaway, 

 Prospertown, Riverton, and Westville, Nkw Jersey; V, VI. 



nigripes. See Emphor. 



nigrosBnea Smith, 1854, p. 305. (Tetralonia) 9 . Brazil. 



Cockerell, 1912d, p. 271. San Juan, Argentina. See menuncha. 



Tetralonia nigrocmia Friese, 1916, p. 295. San Jos6, CosiA Rica; (Schmidt). 



nigrosignata ('ockerell, 1905gf, p. 101. 9 . Oak Creek Canyon, Arizona; 

 (iOOOft.; VIII; (Snow). 



Cockerell, 1906, pp. 109, 309. San Ignacio, New Mexico; VIII; (W. P. 



Cockerell). "Tapper Sonoran." 



nigrosignata pallidisignata Cockerell, 1905/, p. 180. 9 . Oak Creek 



Canyon, Arizona; 6000 ft.; VIII; (Snow). 

 nivea Robertson, 1895, p. 127. 9 . Carlinville, Illinois. 1896, p. 



175: at Aster ericoides viUosus. 1897, p. 354, describes the cf. 



1898, p. 53, suggests that it may be snowii. 



Robertson, 1898a, pp. 230, 244. At Lespedeza reticulata and Helianthus 

 divaricatus. 



Cockerell, 1907e, p. 128. Falls Church, Virginia; IX; (Banks). 



oajacena. See hirsuta. 



obliqua Say, 1837, p. 403. (Macrocera) cf. Indiana. 



Cresson, 1872, p. 275. Texas; (Belfrage, Boll, Heiligbrodt). 



Robertson, 1891a, p. 573. At Asclepias comiiti. 



Robertson, 1894, pp. 451-476. Macoupin County, Illinois; at Vemonia 

 fasciculata (printed novehoracensis but changed by the author in copies sent 

 out), Lacinaria {"Ldatris"] pycnostachyn, Solidago missouriensis, Silphium 

 integrifolium, Echinacea purpurea (tried in vain to collect pollen), Rudbeckia 

 hirta and triloba, Lepachys pinnata, Helianthuft mollis, grosseserratus, strumo- 

 8US, and tuberosus, Verbesina helianthoidea, Coreopsis tripteris, and Cnicus 

 altissimus discolor and lanceolattis. 



Robertson, 1896, pp. 176-178. CarUnville, Illinois; at Silphium per- 

 folialum, Heliopsis Icevis and Rudbeckia lacinicUa. 



Townsend, 1896, p. 140. Las Cruces, New Mexico. 



Cockerell, 1896, p. 305. Santa F6, New Mexico; at Cleome serrtilata. 



Cockerell, 1897c, p. 28. Mesilla Valley, New Mexico; 3800 ft. 



