OF VIRGINIA 18] 
numbers as we go northward. The migratory birds arrive 
about March 19th, and pass southward about September 
2ud to 20th, seemingly loitering more on the fall migra- 
tion southward. They are great insect destrovers, as one 
must notice by their habit of flvine from their perch on 
a dead twig, telephone wire, or building, catching the 
passing insect in mid air, and returning: to the perch to 
devour it. The nests are invariably placed under some 
bridge or arch, or in some kind of an outbuilding; com- 
posed of mud, grasses, weed stems and moss, lined with 
fine grasses and feathers. Five eges seem to be a full set 
with us. Size, .75x.55. They are a pinkish-white before 
being blown, but afterwards become pure white. The 
eges are usually finely specked with reddish-brown, spar- 
ingly over the entire surface. Fresh eggs Mav 4th to 
15th. Only one brood raised a season in Tidewater. 
Their food consists of numerous varieties of bugs and 
beetles injurious to agriculture, while ants, flies of several 
species, grasshoppers, spiders and crickets, form part of 
their food supply. They are sociable little fellows and 
should be protected at all times. In central and western 
sections, thev rear two broods a season. 
GENUS NUTTALLORNIS. 
[£59]. Nuttallornis borealis (Swainson).  Olive-sided 
Flycatcher. 
Rance.—North and South America. Breeds in Cana- 
dian and Transition zones from central Alaska, southern 
Mackenzie, southern Keewatin, central Quebec, and Cape 
Breton Island south in coniferous forests of western 
United States to southern California, Arizona, and west- 
