THAYER AND BANGS : PEARL ISLANDS BIRDS. 145 



14. Regerinus uncinatus (Temm.). 



One $, beginning to attain to blue back of the adult plumage, Saboga 

 Island, April 3. The naked parts are noted by Mr. Brown as " tarsus lemon 

 yellow; skin of loral region flax flower blue, with a yellow spot in front of 

 eye ; iris dirty white." 



15- Ictinea plumbea (Gmel). 



One adult, $, San Miguel Island, March 13. 



TINAMIDAB. 



16. Crypturus soui modestus (Cab.). 



Six adults, both sexes, San Miguel Island, February and March. It is rather 

 strange that the Tinamou of the Pearl Islands should be identical with that 

 of the mainland, but such seems to be the case. We can detect no difl"er- 

 ences either in color or measurements. 



CRACIDAE. 

 17. Ortalis cinereiceps (Gray). 



Ortalis struthopus Bangs^ Proc. New Eng. ZooL Club, vol. 2, pp. 61-62, July 31, 

 1901. 



Seven adults, both sexes, San Miguel Island, February and March. This series 

 .shows that the supposed race from the Pearl Islands is not in any way diff"erent 

 from the bird of the mainland. The present specimens are identical in color 

 as well as in measurements with examples from Panama and Chiriqui. The 

 type of 0. struthopus marked " $ " is probably a female, wrongly sexed. 

 The other original skin. No. 4882, adult 9 , from Pedro Gonzales Island, is 

 the smallest in the whole series, and has the smallest and shortest foot and 

 tarsus ; it is probably a dwarf. Apart from this specimen, measurements of 

 the island birds agree exactly with those of a series from the mainland, the 

 males in all cases being much larger than the females. 



RALLIDAE. 

 18. Aramides cajanea chiricote (Vieill.). 



Four adults, both sexes, San Miguel, February and March. 



These rails, when compared with a series from Panama and Chiriqui, are 

 paler below and average smaller ; there is such an amount of individual varia- 

 tion in size in both series, however, that this apparent diS"erence might not 

 hold good if still more material was measured. The paler color of the under 



VOL. XLVI. — NO. 8 10 



