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, Gotyle riparia, Stelgidopteryx serripenniSj Progne pur- 

 purea. 



2. Eggs thickly speckled : Hirundo liorreorum, Fetrochelidon 

 lunifrons. 



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

 habits of Swallows, with special reference to their nidiflcation : — 



1774. White, G. Account of the House Martin, or Martlet. <^ Philoa. 



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

 Habits of Ohelidon urbica. 



1775. White, 6. Of the House-Swallow, Swift, and Sand-Martin. < Philoa. 



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

 Habits. 



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



Nidiflcation 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 nidiflcation of Hirundo lunifrons. 



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



Ms, Bd. XXV. 1832, p. 589. 

 Auszng aas d. Edinb. Philos. Joaru. 1819, p. 421. 



1832. Couch, J. Nests of the Swallow and Martin. <^ Loudon's Mag. Nat. 

 Hist. V. 1832, pp. 735, 736. 



1832. " H. B." Remarks on [habits of] Swallows. <^ Loudon's Mag. Nat. 

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



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

 Nat. Hist. V. 1832, p. 735. 



1832. Norman, A. " Strodda Underattelser. [Om Svalors parning.] K^Tidsk. 



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

 Not seen — title from von Friesen, Ofv. 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. < Loudon's Mag. Nat. 

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



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

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

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



