July, 1913 STUDY OF THE EGGS OF THE NORTH AMERICAN IJMICOLAE 
149 
Fig. 46. Nos. 48-50, Lapwing [Vanellus vanellus)\ from three different 
SETS, OF FOUR EGGS EACH. NO. 51, BLACK OySTER-C ATCHER [HcSUiatopllS 
backmani) \ from a set of three. No. 52, Oyster-catcher [Hcematopiis 
palliaius )-, from a SET of two. Nos. 53 and 54, European Oyster- 
catcher {Hamatopus ostralegus) ; from two different sets, of three 
EGGS EACH. Slightly less than natural size. 
