424 LAEID^. 



bird on San Juanito Island as late as the 22nd of May, and saw others along the shores 

 of the Tres Marias and at Isabel Island, but no adult individuals were noticed i". 



On the islands of the Bay of Fundy, Brewer found it nesting on the ground, on cliflFs, 

 and in trees, in which they had recently taken to breed. He says that these arboreal 

 nests were cleverly constructed, and could scarcely be imagined to have been the work 



of a Gull. 



The eggs vary from pearly-white, pale drab, or greyish-green, to a brownish clay- 

 colour, the markings being usually of a violet-grey, blended with the more conspicuous 

 blotches of deep sepia-brown ^. 



6. Lams delawarensis. 



Lotus delawarensis, Ord, in Guthrie's Geogr. 2ii(i Amer. ed. ii. p. 319 ' ; Duges, La Nat. i. p. 142 ' j 



Lawr. Mem. Bost. Soc. N. H. ii. p. 317'; Bull. U. S. Nat. Mus. no. 4, p. 51*; Sumichr. 



La Nat. v. p. 234 ' ; Baird, Brewer, & Ridgway, Water-Birds N. Amer. ii. p. 244 ' ; A. O. U. 



Check-1. N. Amer. Birds, 2nd ed. p. 19 ' ; Saunders, Cat. Birds Brit. Mus. xxv. p. 273 ' ; 



Gates, Cat. Eggs Brit. Mus. i. p. 217, t. 17. fig. 5 \ 

 Lams zonorhynchus, a. mexicanus, Bp. Gonsp. Av. ii. p. 224". 



L. argeniato similis, sed multo minor, primario secundo intus macula alba ante fasciam Digram snbterminalem 

 posita omato : rostro virescenti-flavo, fascia nigra sabterminaU, apice flavo ; rictu et amrnlo periophthal- 

 mico aurantiaco-rubris vel miniatis ; pedibns virescenti-flavis ; iride paUide flaya. Long, tota circa 19*0, 

 alae 14-3, caudse 5-6, culm. 1-75, tarsi 2-1. (Descr. maris adulti ex Milford, Conn. Mus. nostr.) 



2 mari similis, vix minor. 



Ad. ptil. Mem. prsecedenti similis, sed pileo et collo postico brunnescenti-griseo striolatis. 



Juv. Brunneus, plumis fulvescente marginatds et subterminaliter brunneis vel nigricantibns ; canda griseseenti- 

 alba, albo terminata, fascia lata subterminali nigra ; primariis nigris, intus graduatim grisescentibns, albo 

 vix terminatis, macula subterminali alba nulla : subtns pure albus ; praepectore et corporis lateribus 

 brunneo maculatis vel fasciatis. (Descr. avis jun. ex Godbout, Canada. Mus. nostr.) 



Rab. NoBTH America generally'^, not breeding southward of ]Sova Scotia on the east 

 or Utah on the west ^. — Mexico, both coasts ^, Guaymas {Mathew ^), Mazatlan. 

 {Grayson ^), Presidio {Forrer ^), Guadalajara {Buges ^), Santa Ana near Guadalajara 

 {Lloyd 8), Gulf of Tehuantepec {Sumichrast * ^). — Beemudas ^; Cuba, occasionally s. 



L. delawarensis, like many other members of the genus Lams, is without a black 

 hood in the breeding-season. It has a pale grey back like L. argentatus, but is a much 

 smaller bird, and has a conspicuous white spot near the end of the second quill-feather. 

 From its nearest ally, L. californicus, it differs in having a well-defined black zone on 

 the bills. 



It is chiefly an inland species during the breeding-season in North America 

 frequenting lakes and marshes ^. In Central America L. delawarensis is a winter 

 visitant, and has been recorded chiefly from Western Mexico. Grayson says that it 

 was common at Mazatlan during the winter months only ^ ; Sumichrast, too noticed it 

 near Tehuantepec in February and March *. 



