170 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4TH Ser. 
“O. socorroensis,’ at Sea 
Fork! Cyl | Tar- | Middle 
No. Locality Date | Sex | Wing | Tail} of | men! sus | Toe and 
Tail Claw 
526 30°40’ N., 117° W..|July 10} @ | 151 | 69 | 18 |15.4/23 22 
543 = me oS | 150 | 74 | 18 |15.7/22.6) 24 
551 is . | USS iS LO MET a 2asstu ono 
557 a v1 o | 155 | 80 | 20 |15.2/22.9| 23.4 
524 |22° 30’N., 
TID SO Wheres itty. 22 ot SEA S20) 1S oh theca 
534 do. o oS | 155 | 74 | 19 |14.1)/22 24.3 
552 do. ve Oe) Loar TOU ES sis) M2223 
S25 222 SINE. 
TSAO Ni comet Pi Sg ey jipyy | 7A .{14.6/21.1]} 22.9 
531 do. of go! | 144 | 74 | 21 |15.3/21.5) 23 
541 do, u o | 152 | 74] 19 }16 (22 | 24.1 
470! do. si oS | 152 | 79 | 17 |15.8]23.1] 24.2 
Miscellaneous Specimens, at Sea* 
Fork Middle 
No. Locality Date | Sex | Wing] Tail| of | Cul- | Tar-|Toe and 
Tail |™en | Sus | Claw 
484 |4° 20’ S., 93° 30’ W.lJune 11] @ | 150] 76 |....)17 {22.3} 25.7 
489 a u POS NUS) ree Loe) 28) 
482 . ‘A a Q | 156 | 77 | 16 |16.5/22.7) 24.5 
405) 14 23) Ni; 1072, W.\Oct:. (5) ot | 14S iogdleds, [1545/23 -3|)24e9 
469 * ny o | 145 | 75 | 17 |16.5)22.9} 24 
464 di ie Q | 154 | 86 | 21 |16.2)23.4| 24.6 
467 = ms Q | 147 | 78 | 19 15 |22.7| 25.3 
Sis 4° 40/N-5 1092 W:.lOct. i8iot | 155 70 116) 23nd ss 
483 oF of | 146). 0.2).0. 14.4/20.1| 21.6 
473 |33° 7’ N., 134° W. |Nov. 15] &@ | 163 | 84] 21 |16 |23 Zot 
480 in i Q | 160 | 81 | 20 |16.2)24.4) 25 
474 135° 40’ N., 133° 14’ W.INov. 19] o@ | 157 | 82 | 19 |16 {23 24.5 
478 re is oa | 158 | 79 | 18 |16.6/25 27 
468 s OSS | 45 Li, 158Gi2383| 225 
The five eggs from the San Benito Islands are of an ovate 
form, varying to elliptical ovate, and are white, marked with a 
few scattered reddish specks; two also have an indistinct zone 
of reddish dots and specks and one has a cap of these markings. 
The measurements in millimeters are respectively: 29 x 21.5; 
30x22 30 x 23:55 30:2.%23:8 731-5 x 24. VA later exe trom 
Southeast Farallon Island is similarly, but more distinctly 
marked, particularly its cap. It is of an ovate form, and meas- 
ures: 31 x 23.4 mm. 
1 Upper tail-coverts white. i 
2 Upper tail-coverts of all the specimens white. 
