BiKDS OF Indiana. 1013 



sings another song. Thus it is during its whole stay with us. It 

 sings and works, morning, evening and mid-day, through the whole 

 long summer. It is said it even sings when on its nest. It is a model 

 of industry and cheerfulness. Its whole life while with us is spent 

 doing good among the fruit and shade trees. 



The earliest spring record is from Bickuell, where it was taken 

 April 12, 1896, and the latest date of first arrival there is 

 April 31, 1897. Other places their arrival has been observed as fol- 

 lows: Brookville, April 13, 1897, April 29, 1882; Eiehmond, April 

 22, 1897; Lafayette, April 28, 1896, May 6, 1895; Sedan, April 17, 



Details of structure of Warbling Vireo. Natural size. 



1896, May 4, 1889; Angola, April 27, 1896; Petersburg, Mich., April 

 21, 1889, April 30, 1897. Mr. J. G. Parker informs me they usually 

 arrive at Chicago, 111., May 1 to 10. I found them mating at Brook- 

 ville, April 20, 1896, and nesting May 21, 1881. Messrs. L. A. and 

 C. D. Test found a nest containing three eggs near Lafayette, July 7, 

 1892. It was built in a willow, fourteen feet up, and out over the 

 water. They usually leave late in August and early in September. 

 They sing as long as they stay. Very late migrants are reported, as 

 follows: Plymouth, Mich., September 15, 1894; Sedan, Ind., Septem- 

 ber 18, 1892; Bieknell, September 12, 1894; Brookville, September 

 21, 1887. 



Prof. King found that 16 Warbling Vireos had eaten 34 caterpillars, 

 5 beetles, 3 bugs, 5 flies, and 1 grasshopper (Geol. of Wis., I., p. 521). 

 In an orchard infested with canker-worms Prof. Forbes found that 

 35 per cent, of their food was canker-worms (Rept. Mich. Hort. Soc, 

 1881, p. 204). 



Subgenus Lahivibeo Baird. 



*250. (628). Vireo flavifrons Vieill. 



Yellow-throated Vireo. 

 Synonym, Yellow-throated Greenlet. 

 Above, bright olive-green; rump, upper tail coverts and wing coverts, 

 ashy; wings and tail, blackish, with two white bars crossing the for- 

 mer; line from nostrils to the eye and ring around the eye, yellow. 

 Below, throat and breast, yellow; other under parts, white. 



