170 PROCEEDINGS OF THE ACADEMY OF 



Genus I. ^Estrelata Bp., 1855. Bill robust, compressed, its unguis large, 

 hooked from the nostrils. Interramal space narrow, fully feathered. Extension 

 of feathers on forehead moderate. Nasal case short. Tail more or less cunei- 

 form, the lateral rectrices much graduated. Hallux of ordinary size. 



1. A. HyESiTATA Coues. ex Proc. hsesitata Kuhl. Not of Forst., Reich., Gld. 

 nor Puff, hsesit. Lawr. Proc. breviroslris and meridionalis Lawr., or Fulmarus 

 merid. Bp., hut not brevirostris Less. P affirms V Herminieri Less. yEslrelala 

 diabolica Bp. Large; pileum and upper parts brown; upper tail coverts, basal 

 half of tail, forehead and neck all around white. Bill or tarsus 145 ; wing 

 12"00; tail 5-50 ; middle toe and claw 2-12. 



2. A. Lessoni Cassin, ex Proc. Lessoni Garnot. Rhantistes Lessoni Bp. Proc. 

 leucocephala Forst. JEstrelata leuco. Bp. ?Pr. alba Gm. ?Daption album Steph. 

 Pr. variegata Bonn. Pr. vagabunda Sol. secundum Bp. Large ; head all around 

 white, except a transocular fascia. Back deep ash. Tail and coverts ashy 

 gray. Bill 1-50 ; tarsus 165 ; middle toe and claw 2-50. 



3. A. rostrata Gray, ex Pr. rostrata Peale. Rhantistes rost. Bp. Large, bill 

 exceedingly robust, along chord of culmen 1-37; height or width at base 066. 

 Wing 11-00, tail 4-75. Tarsus 1-75. With the pattern of coloration and nearly 

 the tints of young Lessoni. Frontal feathers running far forward on the nasal 

 case. 



4. A. parvirostris Coues, ex Pr. parviroslris Peale Rhantistes parvir. Bp. 

 Medium, bill slender and compressed, its length 1-08. Tarsus 1-25. Outer toe 

 and claw 1-66. Young? Above deep fuliginous brown, (no trace of ashy,) 

 this color extending all around the head and neck, on the tips of the feathers. 



5. A. incerta Coues, ex Pr. incerta Schlegel. Large. Wing 11-50 ; tail nearly 

 5, much graduated. Bill 16 to 17 lines ; height 5 lines. Tarsus 1-50. Colors 

 as described much those of young Lessoni; to which the species may be re- 

 ferrible. 



G. A. neglecta Coues, ex Pr. neglecta Schlegel. Medium, with the colors of 

 incerta. Bill; length 1-12; height 4 to 5 lines. Wing 10-00 inches. Per- 

 haps to be referred to parviroslris. 



7. A. Solandri Coues, ex Proc. solandri Gould. Coohilaria solandri Bp. Pr. 

 melanopus Natt. nee. Gm. Large; very robust. Length 16; bill 1-75; wing 

 12; tarsus 75 ; tail 5-50; middle toe and claw 2-37. Bill and feet black. 

 Above dark brown ; becoming slate gray on middle of back, and wing and tail 

 coverts. Young? Washed with gray on the abdomen. 



8. A. grisea Coues, ex Pr. grisea Kuhl, according to Schlegel'a identi- 

 fication. Pr. lugens Banks, Forst. ined. jEst. inexpectata Bp. nee. Forst. 

 Medium, generally like mollis ; with a more compressed bill, and some discrep- 

 ancies in dimensions. Wing 9-50 ; tail 3-88 ; bill 11J lines ; tarsus 16J lines ; 

 middle toe 19 lines. 



9. A. mollis Coues, ex Pr. mollis Gould. Coohilaria and Rhantistes mollis 

 Bp. Pr. inexpectata Forst. ? Pr. melanopus Gm. Vieill. Steph. ? Pr. gularis 

 Peale. ? Pr. Philipph Gray. ? Pr. crepidata vel sandaliala Sol. according to 

 Bp. Medium, bill (chord of culmen) 1-10 ; height at base -45 ; width slightly 

 less ; tarsus 1 33 ; outer toe and claw 1-75 ; wing ranging from 9-50 to 10-50 ; 

 tail 4-50. Under surfaces of the wings coiicolor with the upper. 



10. A. Cookii Coues, ex Pr. Cookii Gray. Rhantistes Cookii Bp. Pr. leucop- 

 (era Gld. Coohilaria leucoptera and C. velox, Rhantistes velox Bp. Pr. brevipes 

 Peale. Small. Bill 1-00, height at base -35. Wing 8-50 to 900 ; tail 375 to 

 4-25, its lateral graduation TOO to 1-50. Tarsus 110. Under wing coverts 

 and a line along edge of fore arm white. 



[May, 



