52 BIRDS OF SOUTHWESTERN MEXICO. 



318. Sterna asitillarisiBB, Less. 



" Tebuantepec (Sau Mateo); August, 1869. 



" Iris tlark-brown ; bill yellow, tip dusky ; feet dull orange-yellow." 



319. My«tr®€heMeS©ii fissipcs (Linn.). 

 " Tebuantepec (Sau Mateo) ; August, 1809. 

 " Iris dark-brown ; bill black ; feet dark-brown." 



320. IShyEtcliops Difgra, Linn. 

 "Tebuantepec (San Mateo); August, 1869. 

 "Iris brown; basal balf of bill coral-red, terminal half black; feet | 



coral-red." 



Fam. PODICIPID^. 



321. Sylbeoeycliss doniinicii(!« (Linn.). 

 " Tebuantepec (Jucbitan) ; September, 1868. 



" Iris orange ; bill black, tip wbitisb ; feet black, tinged witb grayish." 





