83 



17. Querquedula cyanoptera. Cinnamon Teal. — Several 



seen feeding among the grasses along the overflow of 

 the Hardy, near Volcano Lake, on April 26. 



18. Spatula clypeata. Shoveler. — ^'Several" (Rhoads). 



19. Dafila acuta. Pintail. — Several of both sexes observed 



in the alfalfa fields south of Mexicali, March 29. Also 

 seen by Rhoads in February. 



20. Marila americana. Redhead. — Observed sparingly in 



the irrigation ponds south of MexicaH up to the end 

 of April. I photographed a pair on April 15, the 

 birds being not at all shy. 



21. Marila affinis. Lesser Scaup Duck. — Observed on the 



ponds south of Mexicali, where one specimen, a female, 

 was collected on March 29. . 



22. Erismatura jamaicensis. Ruddy Duck. — Recorded 



without comment by Stone and Rhoads. 



23. Chen hyperboreus hyperboreus. Snow" Goose. — 



Rhoads saw great flocks going northward over the 

 southern Cocopahs, and also near the mouth of the 

 Hardy. 



24. Branta canadensis subsp. — "A form of this species was 



continually going toward the coast from the delta, 

 mostly at great elevations" (Rhoads). 



25. Plegadis guarauna. White-faced Glossy Ibis. — A 



dozen or more were observed feeding along the over- 

 flow of the Hardy, near Volcano Lake, on April 26. 



26. Mycteria americana. Wood Ibis. 



Tantalus loculatorf Stone and Rhoads, 688. 

 "A few seen" (Rhoads). 



27. Ixobrychus exilis. Least Bittern. — One seen along the 



overflow of the Hardy, April 26. 



28. Ardea herodias herodias. Great Blue Heron. — Com- 



mon all along the Hardy ; observed many times during 

 both the southward and the return trip. 



29. Herodias egretta. Egret. — First seen when we reached 



the Hardy, on March 30. A month later I en- 

 countered many more, once in company with the 

 following species, in the marshes south of Volcano 



