127 



Measurements. 



11. R 

 O. S . , 



1)0 



Do 

 Do 

 Do 

 Do 

 Do 



CO 



?U(1. 

 cf ?a(l. 

 rf^ad; 

 cTj'iv.: 



2,jnv. ; 



Locality. 



Demerara 



Babia 



do 



Voneznela (San Estaban) 



New Granada 



Veragna (Santiago) 



Ilio Janeiro ^ 



do 





















o 

















a 



09 



<D 













a 



_• 



a 



^ 



n 



^ 



H 



o 



H 



a 



5.70 



4.50 



0.45 



l.CO 



1.10 



6.30 



4.90 



0.50 



1.90 



1.30 



5.50 



4.10 



0.45 



1.55 





6.50 



4.80 



0.50 



1.80 



1.30 



5.40 



4.20 



0.45 



1.50 



1.10 



6.10 



4. SO 



0.50 



1.80 



1.25 



6.10 



5.30 



0..50 



1.90 



1.35 



6.35 



5.50 



0. .52 



1.85 



1.35 



o Collected by- 



"Wucherer. 



Do. 

 Goering. 

 (Verreaux.) 

 E. Area. 



List of speciviens examined. — lu Mns. p. Salvin, 7; G. N. Lawrence, 2 {Panama) ; 

 Pbilad. Acad., 3 (Caiienne) ; Boston Soc, 2 {Brazil, Venezuela, Cayenne); American 

 Mus., New York, 3 ; E. Ridgway, 1 {Demerara) ; total, 18. 



NISUS C?HIERASPIZIAS) COLLARIS. 



Micronisiis collar is Kaup, MS. in Mns. Brit., unde — 



Jccipiter coUaris ScL. Ibis, ii, 1860, US, pi. vi (adult and young). — Lawrence, Ann. 



Lyc. N. Y. 1862, 8 (New Granada).— Gray, Hand List, i , 18(59, 33.— ScL. & Salv. 



Nom. Neotr. 1873, 120.— Sharpe, Cat. Ace. B. M. 1874, 144.— Salv. Ibis, iv, 



1874, 321. 

 Xisiis collaris Giebel, Thes. Orn. 1872, 263. 



Hah. — New Granada. 



Sp. ch. — Wiug, 6.75-7.00; tail, 5.00-5.50 ; culmeii, 0.55; tarsus, 1.75- 

 2.00; middle toe, 1.28. Fourth quill longest; first shortest; outer 

 four with inner webs sinuated. Tail even. Adult {?): — Above dark van- 

 dyke-brown, becoming blackish onthe pileum ; a nuchal collar of white, 

 with the tips of the feathers dusky. Tail brownish-slate, crossed by 

 five bands of black, about equal in width to the slaty bands. Lower 

 parts white, marked everywhere, except on throat, with very regular, 

 sharply-defined broad bars of vandyke-brown, averaging nearly or quite 

 as wide as the white interspaces. Young : — The dark brown of the 

 adult (?) replaced by ferruginous, this brightest on the tail, which has six 

 instead of five black bands. Lower j)arts " cinnamomeous-white ", the 

 tibife more rusty, the sides barred, as in the adult. {Fide Sclater, Ibis, 



1860, p. 149.) 



We are not satisfied as to whether the above description of the sup- 

 posed adult is really the mature stage or the brown phase of the young. 

 Our description is taken from the specimen in the museum of the Phil- 

 adelphia Academy of Natural Sciences, which came from Bogota. 



APPENDIX. 



Regarding Falco jpoliogaster Temminck and Astur pectorcdis Bonaparte, 

 mentioned on page 91, we have, as yet, seen no specimens. We strongly 

 incline to the belief that they will be found different from the true Kisi, 

 and each sufficiently peculiar in details of form to cousiitute a subgenus 

 by itself. 



Regarding F. jyollogastet', Mr. Gurney writes us that it is more like 

 Leucopternis in its generic characters than typical Xisus; and we regard 

 the remarkable coloration of A. pectoraUs is a sufficient cause for sus- 

 pecting the im])ropriet3' ^'^ referring the latter species to either section 

 of the genus Xisus as defined in our monograph. (See Sclater, Ibis, 



1861, pp. 313-311, pi. X). 



The synonymy and specific charactersofthe.se two aberrant species 

 are as follows : — 



