Bulletin - United States National Museum . Occasionally seen sailing over the river during the winter, but notnumerous. [773J 233. (213.) Larus delawarensis Ord. Ring-billed Gull. Seen over the river during the winter months, more frequently thanthe preceding. [778] 234. (214.) Chroicocephalus atricilla {Linn.) Lawr. Laugiiing Gull. A rare visitor, probably only a straggler, during the late summer andearly autumn months. [7SG] 235. (215.) Chroicocephalus Philadelphia (Ord.) Lawr. Bonapartes Hooded Gull. Much more frequently seen than the preceding during the migrations,being comparatively comm
Bulletin - United States National Museum . Occasionally seen sailing over the river during the winter, but notnumerous. [773J 233. (213.) Larus delawarensis Ord. Ring-billed Gull. Seen over the river during the winter months, more frequently thanthe preceding. [778] 234. (214.) Chroicocephalus atricilla {Linn.) Lawr. Laugiiing Gull. A rare visitor, probably only a straggler, during the late summer andearly autumn months. [7SG] 235. (215.) Chroicocephalus Philadelphia (Ord.) Lawr. Bonapartes Hooded Gull. Much more frequently seen than the preceding during the migrations,being comparatively common in August and September. [788] 236. (21(3.) Sterna anglica it/ion f. (S. aranea of the original edition.) Marsh ; only occasionally seen during the late summer and early fall months over the marshes bordering the rivers. [792] LONGIPENNES GAVLE 109 237. (217.) Sterna hirundo Linn. (S. wiluoni of tho original edition.) CommonTern, or Sea Swallow. An occasional visitor during the late summer and early fall months. [797]. Fig. 9D Tern. 238. (—.) Sterna forsteri Xu tt. Forsters Tern. In the original edition we indicated this species as one undoubtedlyto be found in the District. It has since been properly added to thelist by Mr. Jouy, having been actually taken within our limits. [798] 239. (218.) Sterna superciliaris antillarum (Less.) Coues. (S. frenata of the origi- nal edition.) Least Tern. Not uncommon; frequently seen over the marshes of the rivers inAugust and September, and more seldom in the spring. [^01] 240. (219.) Hydrochelidon lariformis (Linn.) Coues. (H. plumbea of the original edition.) Short-tailed Tern. Less numerous than the preceding, but found under similar circum-stances at the same seasons. [806] 241. (220.) Rhynchops nigra Linn. Black Skimmer. A rare straggler, late in the summer or in the beginning of were once seen by ourselves on the Potomac, some distancebelow Washington, September 8, 1858, since which occasio
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