CHECK LIST OF NORTH AMERICAN BIRDS. 121 



774. Larus occidentalis And. B 662. c 5476. R 664. 



Western Herring Gull. 



775. Lams cachinnans Pall. B . c . R 667. 



Pallas's Gull. 



776. Larus affinis Reinh. B . c . R 665. (G.) 



Reinhardt's Gull. 



777. Larus californicns La wr. B 663. c 548a. R 668. 



Calif or nian Gull. 



778. Larus delawarensis Ord. B 664. c 548. R 669. 



Ring-billed Gull. 



779. Larus canus L. B . c . R 671. (! E.) 



Mew Gull. 



780. Larus brachyrhynchus Rich. B 665, 673. c 549. R 670. 



American Mew Gull. 



781. Larus heermanni Cass. B 666. c 551. R 672. 



White-headed Gull. 



782. Rissa tridactyla (L.) Bp. B 672. c 552. R 658. 



Kittiwake Gull. 



774. L. 6c-cid-en-ta'-lls. See Dendrceca, No. 113. 



775. L. ca-chm'-nans. Lat. cachinnans, laughing immoderately; cachinno, I roar with laughter; 



Gr. /coxaC or Kayxdfa, of same meaning. Well expressing the outcry of the gull. 



Not in the orig. ed. ; since determined to occur in Alaska. This is L. borealis of 

 Baird, Trans. Chicago Acad., i, 1869, p. 305. 



776. L. af-fi'-nls. Lat. affinis, allied; ad and finis. See Campylorhynchus, No. 64. 



Not in the orig. ed. ; since determined to be a good species ; North American only 

 as accidentally Greenlandic. See Reinh., Vid. Medd. Nat. For. Kj<b., 1853, p. 78. 



777. L. cal-I-for'-nl-cus. To California. 



778. L. dgl-a-war-en'-sls. To the State of Delaware ; named for Lord De La Ware. 



779. L. ca'-nus. Lat. canus, ashy, hoary-gray. Mediately derived from /cat'co, to burn, con- 



sume, the root here seen giving rise to many words, as cinereus, kinetic, &c. 



Not in the orig. ed. Since ascertained to inhabit Labrador. See Saunders, P. Z. S., 

 1878, p. 178, and Brewer, Bull. Nutt. Club, iii, 1878, p. 50. 



780. L. brach-y-rhynch'-us. Gr. ftpaxvs, short, and ^tryxos, beak. 



NOTE. We give all these Lari, excepting one, as good species, in deference to recent 

 investigation ; but much doubt that the method of treating them in the orig. ed. is not 

 more natural after all. 



781. L. heer'-man-m. To Dr. Adolphus L. Heermann, of Philadelphia, who collected exten- 



sively in the south-west. 



This stands in the orig. ed., very erroneously, as L. belcheri. 



782. Ris'-sa trl-dac'-ty-la. Rtssa or Ritsa is the Icelandic vernacular name. Lat. tris, thrice, 



and dactylus, digit, whether finger or toe : Gr.. SC^TI/AO?. This bird has the hind toe 

 rudimentary, leaving only three perfect digits. Kittiwake is an old Scotch name of 

 this species ; perhaps from its cry. 



