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 182 THE CONDOR Vol. XIX an inordinate appetite for pelican eggs. Young pelicans grow fast, and while they cannot fly for two months, they can swim expertly at a much earlier pe- riod. If it were not for the gulls, Molly Island would be a rather solemn and quiet nesting ground, for the old pelicans never make a sound and even the young have only a low grunt. The White Pelican gets his prey by scooping up fish as he swims along; often a school is driven before him into a sheltered cove where a sudden rus} . and a violent plunge secures a pouch full. A White Pelican is said never to dive, yet on at least one occasion while riding along the shore of the Yellow- stone River I saw one do that very thing. lie did not drop from the air with a mighty splash as a Brown Pelican would have done, but plunged forward and down from the river surface after the manner of a grebe. He went clear under the surface, but I could not say whether or not he caught his fish. Thi bird does not use his pouch to hold fish in, but gulps them down as fast as caught; still the pouch does serve to strain the fish from the water. Sometimes I have seen a pelican rob a fish-duck when that bird incautiously fished too near. This Yellowstone colony bids fair, under government protection, to main- rain its size indefinitely. While the mortality is high. among the young birds. enough reach maturity to a little better than maintain the number. Pelicans are hardy birds, and their reatest danger is from the encroachments of civili- zation. Here on Molly Island they seem to be secure, for they are too far from the regular tourist route to be molested often. Almost all of the pelicans are infested with a tapeworn (Dibothrium cordiceps) in the intestinal tract. Here the parasite lives and discharges its eggs out into the waters of the lake to bc eaten lay the trout, who become the unwitting hosts of the worms in their lar- val, or intermediate stage. And of course the consumption of the trout by the pelicans completes the circle and permit s the larvae to develop. However, these parasites do not destroy Ore pelican nor even affect his health to an a.p- preeiable extent. A third bird that I have noted on Molly Island is the .Caspian Tern (Sterza caspia). I have seen small flocks there twiee, both times in late May, the birds with the black cap and the coral-red bill of the breeding season. But, unfortu- nately, I have never been able to determine positively that these terns nested on the islets, although I believe they do. Summerville, South Carolina, March 31, 1917. A NEW SUBSPECIES OF GEOTHLYPIS BELDINGI By HARRY C. OBERHOLSER THE Belding Yellow-throat, Geathlypis beldingi Ridgway, is a rather un- ] common bird in collections. Occurring, as it does, only in the southern portion of the peninsula of Lower California, its development into two subspecies would seem hardly probable, but such is now seen evidently to be the case. During the course of the identification of specimens of Geothlypis in the Biological Survey collection, the writer's attention was called to the very con- spicuous differences between individuals of this species from the Cape San Lu-