400 AMERICAN HYMENOPTERA. 



Bombus pennsylvanicus Cresson, 9 S (pars.), Proc. Ent. Soc. Phila., 

 II, 1863, p. 94, n. 11 (not the c?). 

 " nidulans Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 107, n. 

 39 and p. 165. 

 Apathus elatus Cresson, Proc. Ent. Soc. Phila., 1863, p. 114, n. 7, c?. 

 Bombus pennsylvanicus Packard, Proc. Essex Instit., IV, 1864, p. Ill, 



9. 

 Apaihus elatus Packard, Proc. Essex Instit., IV, 1864, p. 120, cf. 

 Bombus pennsylvanicus Riley, Am. Ent. and Bot., II, 1870, p. 303, 9 . 

 Apathus elatus Cresson, Trans. Amer. Ent. Soc, IV, 1872, p. 285. 

 Bombus pennsylvanicus Cresson, Rep. Geogr. and Geol. Explor. and 

 Surv. 100th Merid., 1875, V, p. 728, n. 128, 

 9. 

 " •' Cresson, Proc. Davenp. Acad. Nat. Sci., I, 



1876, p. 210— also A. elatus. 

 Apathus elatus Cresson, Rep. Geogr. and Geol. Explor. and Surv. 

 100th Merid., VII, 1879, p. 230. (Catal.). 

 *' " var. nidulans Cresson, Trans. Amer. Ent. Soc, VII, 



1879, p. 230. (Catal.). 

 Bombus pennsylvanicus Cresson, Trans. Amer. Ent. Soc, VII, 1879, 

 p. 230. (Catal.). 

 •' " var. aw^r/<:a«<7r«w Cresson, Trans. Amer. Ent. 



Soc, VII, 1879, p. 230. (Catal.). 

 " " var. pallidus Cress., Trans. Amer. Ent. Soc, 



VII, 1879, p. 230. (Catal.). 

 Bowles, Ann. Rep't Ent. Soc. Ont., 1880, p. 

 33. 

 Apathus elatus Provancher, Natural. Canada., XIII, 1882, p. 269, n. 3, 

 c?. 

 " " Provancher, Faun. Entom. Canad. Hymen., 1883, p. 



737, n. 3, cf . 

 " Cresson, Syn. Hym. No. Amer., 1887, p. 307. 

 Bombus pennsylvanicus, 9 and S (pars.), Cresson, Syn. Hym. No. 

 Amer., 1887, p. 308 (not the cf ). 

 •• •' var. pallidus Cresson, Syn. Hym. No. Amer., 



1887, p. 308. 

 Apis elata Cresson, Syn. Hym. No. Amer., 1887, p. 309. 



" nidulans Cresson, Syn. Hym. No. Amer., 1887, p. 309. 

 Bombus americanorum Cresson, Syn. Hym. No. Amer., 1887, p. 309. 

 ? Psithyrus elatus Provancher, Addit. Faun. Can. Hym., 1888, p. 343. 

 Bombus pennsylvanicus Ant. Handlirsch, Ann. Naturh. Hofmus. 



Wien., Ill, 1888, p. 238 (pars.). 

 Coville, Proc. Ent. Soc. Wash., I, 1890, pp. 

 202 and 238 (pars.). 

 Apathus elatus Coville, Proc. Ent. Soc. Wash., I, 1890, p. 202. 



