1946. History of the North American bird fauna. Wilson Bull., 58:3-41.

MEYERRIECKS, A. J.

1960. Comparative breeding behavior of four species of North American herons. Publ. Nuttall Ornith. Club, no. 2:158 pp.

MEXICAN CHECK-LIST

1950. Distributional check-list of the birds of Mexico. Part I. Pac. Coast Avif., 29:202 pp.

1957. Distributional check-list of the birds of Mexico.

Part. II. Pac. Coast Avif., 33:436 pp.

ORIANS, G. H.

1961. The ecology of blackbird (_Agelaius_) social systems.

Ecol. Monogr., 31:285-312.

PAYNTER, R. A., JR.

1955. The ornithogeography of the Yucatan peninsula. Peabody Mus. Nat. Hist., Bull. 9:347 pp.

PETERSON, R. T.

1960. A field guide to the birds of Texas. Houghton Mifflin Co., Boston. 304 pp.

PITELKA, F. A.

1950. Geographic variation and the species problem in the sh.o.r.e-bird genus _Limnodromus_. Univ. California Publ.

Zool., 50:1-108.

PRICE, W. A.

1933. Role of diastrophism in topography of Corpus Christi area, south Texas. Bull. Amer. a.s.soc. Petrol. Geol., 17:907-962.

ROBINS, C. R., MARTIN, P. S., and HEED, W. B.

1951. Frigate-bird, oystercatcher, upland plover and various terns on the coast of Tamaulipas, Mexico. Wilson Bull., 63:336.

SELANDER, R. K.

1958. Age determination and molt in the boat-tailed grackle.

Condor, 60:355-376.

1959. Polymorphism in Mexican brown jays. Auk, 76:385-417.

SELANDER, R. K., and ALVAREZ DEL TORO, M.

1955. A new race of booming nighthawk from southern Mexico.

Condor, 57:144-147.

SHANTZ, V. S.

1949. Three new races of badgers (_Taxidea_) from southwestern United States. Jour. Mammal., 30:301-305.

SMITH, H. M.

1946. Handbook of lizards. Comstock Publ. Co., Ithaca, New York. 557 pp.

SUTTON, G. M.

1950. The southern limits of the willet's continental breeding range. Condor, 52:135-136.

TAYLOR, J. M.

1961. Reproductive biology of the Australian bush rat Rattus a.s.similis. Univ. California Publ. Zool., 60:1-66.

THOMPSON, M. C.

1958. Semipalmated sandpiper from Tamaulipas. Wilson Bull., 70:288.

WYNNE-EDWARDS, V. C.

1955. Low reproductive rates in birds, especially sea-birds.

Acta XI Internat. Ornith. Congr., 540-547.

1959. The control of population-density through social behaviour: a hypothesis. Ibis, 101:436-441.