370 Peters, Birds Collected in Quintana Roo, Mexico. I July 



Thanks are also due to the authorities of the U. S. National 

 Museum and the Bureau of Biological Survey for the loan of speci- 

 mens, including many types, needed for comparison. 



In conclusion I take special pleasure in acknowledging my in- 

 debtedness to Mr. C. L. Hay, for without his generous interest it 

 would have been impossible for a zoologist to have accompanied 

 this expedition. 



LIST OF SPECIES. 



ARDEID.E. 



Hydranassa tricolor ruficollis (Gosse). 1, Hondo River near Camp 

 Mengel, January 31. 



Florida caerulea (Linn.). 3 cf , Xcopen, Feb. 10 and March 3. Camp 

 Mengel, April 24. 



Butorides virescens virescens (Linn.). 3 9, 1 undetermined, Camp 

 Mengel, January 31, February 7; Xcopen, February 18 and 24. 



A bird (sex undetermined) taken at Camp Mengel, February 7, exhibits 

 a rather peculiar phase of plumage. Crown, hind neck, auricular region, 

 secondaries, and tail as in normal plumage; feathers of chin and throat 

 dusky, edged with white; feathers of neck dusky with whitish median line; 

 sides of neck rusty; greater, middle and lesser coverts and scapulars broadly 

 edged with dark rusty; back dull greenish; breast dark smoky; abdomen 

 smoky, the feathers edged with dull buff. 



Nyctanassa violacea (Linn.). 1 cf on river near Camp Mengel, Jan- 

 uary 21. 



Falconid^e. 



Accipiter bicolor schistochlamys Helbnayr. 1 cf , Xcopen, March 3. 

 Iris orange; legs and feet yellow. 



Rupornis magnirostris conspecta, new subspecies. 



5 both sexes, Camp Mengel, January 16, February 4, March 16 and 26, 

 Xcopen, March 7. 



Tijpe from San Ignacio, Yucatan, no. 40,123, adult cf, M. C. Z. Collected 

 February 9, 1904, by L. J. Cole. 



Characters. Similar to Rupornis magnirostris griseicauda Ridgway but 

 smaller; much paler (smoke grey) above; slightly paler below. 



