512 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
STERNA ANZTHETA RECOGNITA (Mathews). 
CARIBBEAN BRIDLED TERN. 
Similar to S. a. anxtheta* but under parts wholly pure white, 
hindneck white, and lateral rectrices white with very little brownish 
gray on terminal portion of inner web only. 
Adults (sexes alike)—Forehead and superciliary region, lower 
portion of lores, suborbital region, lower portion of auricular region, 
and entire under parts, including axillars and under wing-coverts, 
immaculate pure white; lower hindneck grayish white or very pale 
gray; crown, occiput, nape, upper hindneck, postocular region (in- 
cluding upper portion of auricular region) and broad stripe across 
lores (from bill to eye) uniform black; back, scapulars, rump, upper 
tail-coverts and eight middle rectrices plain blackish fuscous, becoming 
more grayish (nearly quaker drab) on upper back, where fading 
anteriorly to grayish white on lower hindneck; wings deeper fuscous- 
black, the primaries darker (more nearly black), the anterior margin 
of wing, abruptly, pure white; outermost pair of rectrices white, with 
terminal portion of inner web brownish gray, the next pair similar 
but with much more gray, this on terminal portion of outer web also; 
the third pair (from outside) with the dusky grayish general color. pass- 
ing into white basally, more extensively on inner web; inner webs of 
primaries with an extensive, well-defined ‘‘wedge” of white; bill, 
legs, and feet black. 
Adult male.—Wing, 251-263 (257); tail, 147.5-164 (155.1); ex- 
posed culmen, 39-41 (39.9); tarsus, 19-21 (20.2); middle toe, 22—23.5 
(28).° 
Adult female—Wing, 255-263 (258.8); tail, 150.5-174 (162.9); 
exposed culmen, 38-40.5 (39.2); tarsus, 19.5-20.5 (20); middle toe, 
22-24 (22.9).¢ 
@ See p. 487. b Six specimens. ¢ Five specimens. 
| Ex- r 
Locality. Wing. | Tail. | posed. | Tarsus. Misile 
culmen f 
MALES. 
One adult male from Bahamas (Booby Rock).........-.-...-. 257 i i re 21 23.5 
Five adult males from Porto Rico (Desechio Island and Agua- 
dilla)....... oid sina discnc gate auios ab lowiepapesacie came asnencae 257 153.3 | 39.9] 20 22.9 
Seven adult males from coast of Guerrero (S. a. nelsoni) ....... 267.7 | 170 42 20.7 23.8 
Three adult males from southern China Sea (8. a. anaetheta)...| 267.5 | 173.2 42.5 21.5 23.3 
One adult male from ‘‘Island of Candia” (S. a. L)wimecewty 251 122 37.5 19 20 
One adult male from Mahe, Seychelles (S. a. antarctica)........ 206 141 40 18 20.5 
FEMALES, 
Three adult females from Porto Rico (Desechio Island)........ 257 165 39.5 19.9 23 
Two adult females from Tobago.....-.-......--..2.0-- eee eee 261.5 | 162.2 38.7 20.2 22.7 
One adult female from coast of Guerrero (S. @. nelsoni) ........ 260 170 40.5 20 23 
One adult female from off coast of Central America (S.@. nelsoni) .| 270 169 36 20) | samnnnes 
Two adult females from southern China Sea (8. a. anztheta) ...; 265.5 | 175.5 39.7 20 22.2 
One adult female from eastern Sumatra (9. a. anextheta) ........ 263 176.5 41 21 22 
