628 GEOLOGICAL SURVEY OF NEW JERSEY. 



XBMA, Leach. 



X. sabinii, Sab. Sabine's Gull. Forked-tail Gull. 



Much like above, but with a black collar and hood ; more 

 black on quills; mantle deeper bluish gray; bill tipped with 

 orange. Length, L3| inches; tail, 4| inches, forked for nearly 

 1 inch. Ranges south to New York, casually further south. 



QELOCHELIDON. Brehn. 



Q. nilotica, Hass. {anglica, Mont.,) {Sterna aranea — Abbott's Catalogue.) 

 Marsh Tern. Gull-billed Tern. 



Tail forked; feet black; bill stout (H inches); top of head, 

 &c.y black in summer, white in winter; upper parts pearl gray, 

 otherwise white. Length, 15 inches; wings, 12 inches; tail, 6^ 

 inches. 



"Arrive about April 15th. Breed along the coast. Not found 

 inland. Do not associate with other species." 



STERNA, L. 



S. tschegrava, Lepech. [Thalasseus caspius, Pall.) Caspian Tern. 



Tail forked for less than a fifth of its length ; adult in spring ^ 

 top of head glossy black ; feet black ; bill red ; plumage white, 

 pearl gray above ; after pairing season, white, speckled on the 

 black of head ; winter adult white or grayish, streaked on head ; 

 dark colors more extended in young. Length, 20 inches ; wings, 

 17 inches; tail, 6 inches. 



"A northern species, only occasionally met with. Is more 

 rarely seen than the sooty tern. Is met with in winter." 



S. maxima, Bodd. {T. regius, Gamb.) Royal Tern. 



Bill orange ; tail forked for half its length ; adult in springy 

 top of head and occipital crest and feet, black ; after pairing 

 season, only occipital region black ; in winter, white, mixed with 

 black of occiput ; bill paler ; young like winter adult, but upper 

 parts spotted. Length, 20 inches; wings, 15 inches; tail, 8 

 inches. More slender body than preceding. 



" Like the preceding, is a rare species. Visits us from the 

 South during the summer. Does not breed in the State." 



