396 LITERATURE OF SWALLOW ARCHITECTURE 



able analogy, that Swallows' eggs were originally or primitively 

 white, and that they became colored somewhat according to 

 increasing degree of exposure to which they may have been 

 subjected during the long time in which the nesting habits of 

 the birds have undergone modification. 



1. Eggs pure white, unmarked : Tachycineta bicolor, T. tha- 

 lassina, Cotyle riparia, Stelgidopteryx serripennis, Prague pur- 

 purea. 



2. Eggs thickly speckled : Hirundo horreorum, Petrochelidon 

 lunifrons. 



I have at hand the following titles of articles relating to the 

 habits of Swallows, with special reference to their nidification : 



1774. WHITE, G. Account of the House Martin, or Martlet. < Philos. 



Trans. Ixiv. pt. i. 1774, pp. 196-201. 

 Habits of Chelidon urbica. 



1775. WHITE, G. Of the House-Swallow, Swift, and Sand-Martin. <PMlo8. 



Trans. Ixv. pt. ii. 1775, pp. 258-276. 

 Habits. 



1831. STEEL, J. W. Swallows. < Am. Journ. Sci. xix. 1831, pp. 356, 357. 

 Nidification of Hirundo lunifrons. 



1831. WOODRUFF, S. Notice of a Barn Swallow in a letter to the Editor 



dated Windsor, Turky [sic] Hill, June 7th, 1830, from Samuel Wood- 

 ruff. < Sillim. Am. Journ. Sci. xix. 1831, pp. 172, 173. 

 Description and nidification of Hirundo lunifrons. 



1832. CARMICHAEL, Capt. Capitain Carmichael iiber Schwalben. < Oken's 



Ms, Bd. xxv. 1832, p. 589. 

 Auszug aus d. Edinb. Philos. Journ. 1819, p. 421. 



1832. COUCH, J. Nests of the Swallow and Martin. < London's Mag. Nat. 

 Hist. v. 1832, pp. 735, 736. 



1832. "H. B." Eemarks on [habits of] Swallows. < London's Mag. Nat. 

 Hist. v. 1832, pp. 285-287. 



1832. "H. B." Instinct in the Martin (Hirundo urbica). < London's Mag. 

 Nat. Hist. v. 1832, p. 735. 



1832. NORMAN, A. " Strodda Underattelser. [OmSvalorsparning.] <Tidsk. 



f. Jagare o. Naturf. i. 1832, p. 320." 

 Not seen title from von Friesen, O'fv. Sver. Orn. Litt 



1833. " A FRIEND OF C. P.'s." The Swallow, a capricious Architect. < Lou- 



don's Mag. Nat. Hist. vi. 1833, pp. 454-456. 



1833. BREE, W. T. A late Brood of young Martins. < London's Mag. Nat. 

 Hist. vi. 1833, pp. 70-72. 



1833. CLARKE, W. B. Birds' Nests in singular Places. <^Loudon's Mag. Nat. 

 Hist. vi. 1833, pp. 523, 524. 

 Swallow's nest in heel of a shoe in an inhabited apartment. 



