INSESSORES. 95 



of the wing-coverts ; on the outer webs of the primaries the 

 markings assume the form of bars of mingled buffy, buffy 

 white, and rufous ; tail light brown, crossed with numerous 

 defined bands of grey, freckled with black, and with a rufous 

 hue on the lateral feathers ; under surface pearly white, 

 minutely freckled with brown, and with a line of brown down 

 the stem ; a series of these darker marks, forming an irre- 

 gular line, down each side of the neck ; bill and feet brownish 

 olive. 



The markings of the female are similar, but her general 

 tint is very much darker, and of a more rufous hue; the 

 under surface, too, is dark brown, with here and there large 

 blotches of buffy white ; a series of nearly quadrangular 

 blotches, bordered with dark brown, descends down each side 

 of the neck. 



Genus EUROSTOPODUS. 



This genus, so far as is yet known, comprises but two 

 species, both of which are probably confined to Australia. 

 They diff'er considerably in their habits from the other Cajrri- 

 mulgi. Their wing-powers being enormous, they pass through 

 the air with great rapidity, and while hawking for insects 

 during the twilight of the early dawn and evening, they make 

 the most abrupt and sudden turns in order to secure their 

 prey. Like the typical Nightjars, they rest on the ground 

 during the day. In every instance in which the site employed 

 for incubation by the Eurostopodus guttatus has been discovered, 

 a single egg, deposited on the bare ground, has alone been 

 found. 



The members of this genus are very nearly allied to the 

 Lyncorni, a genus of Nightjars inhabiting the Indian Islands, 

 of which L. cerviniceps and L. macrotis are typical examples. 



