24 CALIFORNIA ACADEMY OF SCIENCES. 



The nest was like similar ones of this genus adapted to 

 the space wherein it was built, and composed of such ma- 

 terial as was nearest at hand. In this case rootlets, a bit of 

 rag and considerable wild cotton, enter into the external 

 composition, while a few soft shreds from plant stalks, a 

 quantity of wild cotton, and lastly, some horsehairs com- 

 plete the interior. 



Both birds were about while the nest was being removed; 

 the male was intensely bright colored, A few days later 

 this pair began another nest under the same roof near the 

 old site. 



The eggs are not distinguishable from egejs of C. frontalis 

 from California. They are sparsely marked with black in 

 an irregular wreath about the larger end. In size they 

 measure 18.5 x 15 and 19 x 15 millimetres. 



Aphelocoma californica hypoleuca Kitlgw. 



Xantus's Jay. — A single nest of this new variety was 

 found by myself a few miles southward from San Ignacio on 

 April 12, 1889. 'I'he nest was built about three metres high 

 in a green acacia near the trail. The female was sitting, 

 and did not liy until preparations for climbing the tree had 

 commenced. The nest was in quite an exposed situation 

 amongst scant twigs on a horizontal branch. It is composed 

 of small loosely laid dry twigs, and a shallow receptacle 

 lined with fibre and horsehair. 



The eggs, three in num-ber (set No. 899, coll. of W. E. B.), 

 contained small embryos. They are more finely spotted 

 than some similar jay's eggs, with shell spots of pale lilac- 

 gray and surface spots of pale olive-green. The ground 

 color is dull, pale glaucous grfion. They measure 27.5 x 20.5; 

 27.5x21; 27x21 millimetre- 



