HALOCYPTENA MICROSOMA. 



black ; under wing-coverts dark sooty-brown, like the breast, those round the 

 edge of the wings forming a black band, scarcely distinguishable ; bill and feet black. 

 Total length about 5.5 inches; culmen, 0.4; wing, 4.85; tail, 2; tarsus, 0.85; 

 middle toe and claw, 0.7. 



Adult female. Similar to the male. Total length about 6.5 inches ; culmen, 0.4 ; 

 wing, 5.05 ; tarsus, 0.85 ; middle toe and claw, 0.8. 



The descriptions are taken from a pair of birds in the British Museum, collected 

 by Mr. Anthony on San Benito Island. The specimen figured is the bird obtained by 

 Mr. Forrer, off Mazatlan, formerly in our collection, and now in the British Museum. 



