78 



qui color fasciam transversam efficit ; lined angustd a nare ad 

 oculum ; genis corporeque subtiis albis, hoc colore in cinereum ad 

 latera transeunte ; rostro, pedibusque fuscis. 



Long, tot., 5 unc. ; caud., 2\; ala, 2^; rost. ^; tarsi, |. 



Hab. St. lago. 



Obs. This is in every respect a typical Pyrgita, and rather smaller 

 than the common species, P. domestica. 



Mr. Gould then called the attention of the Members to some spe- 

 cimens of M. alba and M. YarrelUi, which presented in a very de- 

 cided manner the distinctions referred to by him at the last Meeting. 

 He afterwards characterized a new species of that genus under the 

 name of 



MoTACiLLA LEUcopsis. Mot. fttcie, vertics, plumis auricularibus, 

 guld, abdomine, crisso, rectricibus caudce duabus externis albis ; 

 primariis, tertialibus, tectricibus majoribus minoribusque alarum 

 albis ; notd pectorali semilunari, occipite, collo, dorso, humeris, 

 uropygio, rectricibusque octo cavdee intermediis nigris, primariis 

 ad apicem et internl nigrescenti-fuscis ■ rostro pedibusque nigra- 

 fuscis. 



Long, tot., 7 unc. ; alee, 3|; caud., 3f ; rost.,%; tars., 1. 



Hab. India. 



