114 



Genus Empidonax Cal. 



143. E. pusillus var. trailli Bd. TitAiu/s FLYCATCiiKn. An 

 uncommon summer resident. Arrives May 8tli and departs in Sep- 

 tember. 



144. E. minimus 13d. Lkast Flycatcher. Common summer 

 resident. Arrives and departs witli E. trailli. 



145. E. acadicus Bd. Acadian Flycatciiku. A rare summer 

 resident. Arrives a little later tlian the preceding. 



143. E. flaviventris Bd. Ykllow-bklukd Flycatciiru. A com- 

 mon migrant; Maj' 15th to 2.jth, and September until the 1st of Octo- 

 ber. The first of July, 1873, I found them quite common in a dense 

 swampy thicket in Northern Indiana, where they had probably nested. 



Family AlcedinidSD. 

 Genus Ceryle Bole. 



147. C. alcyon Boie. KixGrisiiEU. Common summer resident 

 along streams and ponds. Arrives the last of March and departs the 

 last of November. 



Family CAPRI MULGIDJE. 

 Genus Chordeiles Sw. 



148. C. popetue Bd. Night Hawic. A common summer resi- 

 dent. Arrives the lOLli of May and departs in immense flights, often 

 lasting several hours, the 1st of September. 



148a. Var. henryi Cass. First obtained in this vicinity by Mr. 

 Rice, near Waukegan, July, 1875. The spring of 1876, I found these 

 birds breeding, with var. iwpetue, in considerable numbers among the 

 sand hills on the Lake shore, near Waukegan. I should judge that 

 the two forms existed in about equal numbers at that place. They 

 are, however, less common in other localities I have visited. Among 

 the specimens examined were individuals that exhibited a perfect in- 

 tergradation of the two forms. Some specimens would have the 

 white patch on tlie wings like those in typical henryi, while the tail 

 was marked as in popetw', and vice versa. Other specimens showed 

 a varying degree of white, on the wings and tail, between the two 

 varieties. In none is the lightness of the back quite so prominent as 

 In specimens from the western plains. 



Genus Antrostomus Gould. 



149. A. vociferus Bonap. Wiiip-pooi:-will. Common summer 

 resident. Arrives the last of April and departs in September. 



