^°S9^^] Bow'LKS, Nes/Z/ii,'- //„/,,7s of Afi/Z/ONvs Vireo. I^Q 



of an inch and a half. It was ph\ced nine feet up in a young fir, 

 and five feet from the trunk of the tree. 



Its composition is, as above mentioned, aitOf,'ether different 

 from that used by any other Vireo that has come under our notice. 

 The outside material consists entirely of a long, hanging moss, 

 which must be very closely allied to the C/s/iea of the Eastern 

 States, very thickly and closely interwoven. The first point that 

 strikes one, on looking at it, is the absence of outside patch-work of 

 any kind, such as is almost invariably found on the nests of other 

 Vireos. In fact, at first sight, there is a very striking similarity 

 to many nests of the Parula Warbler {Co7nJ>sot/i/ypis amerita7ia) . 

 Its entire Uning is composed of fine, dried grasses, thickly and 

 neatly interwoven. The extreme outer dimensions in inches are : 

 length 4}, width 3^, depth 2%. The inside dimensions in inches 

 are: length 2^, width i^, depth 2. 



The eggs, of which there were only two, resemble more closely 

 certain specimens of eggs of the Red-eyed Vireo ( Vireo olivaceus) 

 than those of any other species in our collection that we have 

 used in comparison. The ground color of both is a lustreless, 

 milky white. In markings. No. I has a ring of dark brown dots, 

 verging often into black, scattered sparingly around the larger 

 end. Also one fine, hair-like line three eighths of an inch long, 

 running between the dots like the lines on an Oriole's egg. 

 No. II is simply and very sparingly marked all over the larger 

 end with dots of the same color. Their measurements in inches 

 are: No. I, .76X.56; No. II, .74X.55. 



Incubation was about one half advanced at this date, June 21, 

 1897, which, if the date is not unusual, makes this bird breed 

 later than either cassiiiii or gilvus, which commence incubation 

 four and two weeks earlier respectively. 



The female bird was on the nest when first seen and, unlike 

 the majority of our Vireos, flushed the instant the ascent of the 

 tree was attempted. From the nest, she flew about twenty feet 

 into a neighboring fir, where she looked down on our operations 

 with apparently no concern whatever. Beyond rearranging her 

 feathers from time to time, there was nothing to indicate that she 

 had a nest anywhere in the vicinity, as she made no sound or 

 complaint of any kind. Neither was there any of the nervous 



