HENRY J. FRANKLIN. 401 



Bombus americanorutn Robertson, Ent. News, I, 1890, p. 40. 

 Apathus elatus Robertson, Ent. News, I, 1890, p. 40. 

 Bombus americanorum Smith, Economic Entomology, 1896, fig. 473, 

 e and g, 9 S . 

 Dalla Torre, Cat. Hym., X, 1896, p. 510. 

 nididans Dalla Torre, Cat. Hym., X, 1896, p. 538. 

 " pennsylvaniciis Dalla Torre, Cat. Hym., X, 1896, p. 539. 



var. pallidus Dalla Torre, Cat. Hym., X, 1896, 

 p. 539. 

 " americanorum Robertson, Trans. Ac. Sci. St. Louis, VII, 

 1897, p. 356 (also B. nidulatis). 

 Psithyrus elatus Dalla Torre, Cat. Hym., X, 1896, p. 569. 

 Apathies elatus Smith, Economic Entomology, 1896, fig. 473 i, c5^. 

 Bombus americanorum Cockerell and Porter, Ann. and Magaz. Nat. 

 Hist., Ser. 7, Vol. IV, 1889, p. 388. 

 Cockerell, Bull. Sci. Lab. Den. Univ., XI, 1898, 

 p. 71, 9 cf 

 Psithyrus cevallics Cockerell, Entomologist, XXXII, June, 1899, p. 157. 

 Bombus americanorum var. pallidus Meehan, Proc. Acad. Nat. Sci. 

 Phila., LIV, 1902, p. 35. 

 titusi Ashmead, Ent. News, XIII, 1902, p. 50. 

 Pennsylvanicus Titus, Can. Ent., XXXIV, 1902, pp. 38 and 



42, 9 a c?. 

 Titusi Titus, Can. Ent., XXXIV, 1902, pp. 38 and 42, cf. 

 pennsylvanicus Meehan, Proc. Acad. Nat. Sci. Phila., LIV, 



1902, p. 35. 

 americanorum Robertson, Trans. Amer. Ent. Soc, XXIX, 



1903, p. 177, 9 cf. 

 Viereck, Can. Ent., XXXVI, April, 1904, pp. 



98 and 100. 

 pe7insylvanicus Howard, Insect Book, 1904, Plate I, fig. 29. 

 americana Howard, Insect Book, 1904, Plate I, figs. 30, 9 , 

 and 31, (?. 

 Psithyrus elatus Kellogg, American Insects, 1905, Plate XII, fig. 4, c?. 

 Bombus pennsylvanicus Viereck, Trans. Amer. Ent. Soc, XXXII, July, 



1906, p. 238. 

 Psithyrus cevallics Cockerell, Trans. Amer. Ent. Soc, XXXII, Nov., 



1906, p. 312. 

 Bombus americanorum Cockerell, Trans. Amer. Ent. Soc, XXXII, 

 Nov., 1906, p. 313. 

 " " Smith, Economic Entomology, 1906, fig. 473, 



e and g, 9 S . 

 Apathus elatus Smith, Economic Entomology, 1906, fig. 473 i, c?. 

 Bombus fervidus Fairchild and Barrett, Proc. Ent. Soc. Wash., VIII, 

 1906, pp. 13 and 14, Plate I, 9 c?. 



TRANS. AM. ENT. SOC, XXXVIII. (51) 



