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Order ANSERES;] 



[Eam. LAEID^. 



HYDEOCHELIDON LEUCOPTEEA. 



(WHITE-WINGED BLACK TERN.) 



Sterna fissipes^ Pallas, Zoogr. Rosso-Asiat. ii. p. 338 (1811). 

 Sterna leucoptera^ Meisner u. Schinz, Vog. d. Schweiz, p. 264 (1815) 

 Hydroclielidon leucoptera^ Boie, Isis, 1822, p. 563. 

 Viralva leucoptera^ Stepli. Gen. ZooL xiii. p. 170 (1825). 

 Hyd/rochelidon nigra^ Gray, Gen. of B. iii. p. 660 (1846). 



Ad. ptiL cestiv. supra nitide niger, dorso et scapularibus paullo famoso lavatis : dorso postico et uropygio 



albis : Cauda alba : tectricibus alarum minimis albis^ medianis et majoribus pulchre cinereis : remigibus 

 nigris, primariis interioribus canis^ secundariis nigris dorso concoloribus : facie lateral! et corpore sub- 

 tus toto nitide nigris : crisso et subcaudalibus albis : subalaribus nigris^ extus albo notatis : rostro nigro : 

 pedibus pallide rubris : iride nigrd. 



Ad. ptiL Mem, suprk dilute cinereus, collo postico nigricante notato : tectricibus alarum dorso concoloribus^ 



quibusdam minoribus versiis basin brunnescentibus : remigibus nigricautibus^ scapis ochraceis^ pri- 

 mariorum pogonii interni dimidio albo, secundariis cinereo lavatis : rectricibus supr^ cinereis, externis 

 albicantibus anguste albido limbatis : facie et collo lateralibus torquem interruptum collarem formanti- 

 bus : subtus omnino albus : rostro nigro versus basin rubescente : pedibus flavidis. 



Adult in summer. Head, neck, and all the under surface shining black ; the whole of the scapulars, and the 

 back, smoky black ; upper wing-coverts dark grey, becoming white towards the edge of the wing ; first 

 two primaries greyish black, with white shafts, and broadly marked with white on their inner webs ; the 

 rest of the primaries dark silvery grey, smoky on their inner webs ; secondaries sooty grey, the inner 

 ones darker j rump and tail, with upper and lower coverts, pure white. Irides and bill black ; legs 

 dull red. Total length 8-5 inches ; extent of wings 21 ; wing, from flexure, 8 j tail 2-75 ; bill, along the 

 ridge -9, along the edge of lower mandible 1*25; bare tibia "25 ; tarsus -ZS; middle toe and claw 1 ; 

 hind toe and claw *2. 



Adult in winter. Forehead, sides of the head, and all the under surface pure white ; occiput, ear-coverts, 

 nape, and hind neck greyish black ; upper surface of back, wings, and tail dark grey ; the small wing- 

 coverts shaded with broAvn ; the primaries sooty black, with white shafts ; the secondaries with dark 

 shafts, and tinged more or less with grey. 



KNOW 



On the 



Waihopai 



Province of Nelson ; and one of these is now in the Colonial Museum. They were in full summer 



I 



