6^ Zoological Society. 



white along the basal portion of their outer webs ; all the under sur- 

 face scarlet, separated from the green of the chest by a semilunar 

 mark of white ; two middle tail-feathers golden green ; the two next 

 on each side golden green on their outer webs and black on their 

 inner, the whole six tipped with black ; the three outer feathers on 

 each side black, crossed by numerous narrow bars of, and narrowly 

 tipped with, white ; thighs black ; bill orange ; irides red ; feet dark 

 grey. 



Total length, 10 inches; bill, 1 ; wing, 5^^; tail, 5f ; tarsi, ^. 



Hah. Escuintla, South America. 



Remark. — Nearly allied to Trogon collaris, Vieill. 



CucuLUS OPTATUS. Cuc. coi'pove superiore cceruleo-griseo ; pogo- 

 niis internis primariarum fasciis latis albis ornatis ; remigihus sa- 

 turate violaceo-brunneis i apicibus subalbidis, serie macularum ob- 

 long arum albarum alternatim ordinatd ; corpore subtiis albo, fasciis 

 nigris. 

 The whole of the upper surface slaty grey ; inner webs of the pri- 

 maries broadly barred with white ; tail-feathers dark violet-brown, 

 "with a row of oblong spots of white placed alternately on either side 

 of the stem, and slightly tipped with white ; the lateral feathers have 

 also a row of white spots on the niargin of their inner webs ; chin 

 and breast light grey ; all the under surface bufFy white, crossed by 

 bands of black ; irides, bill and feet orange. 



Total length, 13 inches ; bill, 1;^ ; wing, 7| ; tail, 6^; tarsi, |. 



Hab. Port Essington, Australia. 



Remark. — Closely allied to the Common Cuckoo of Europe. 



CucuLus INSPERATUS. Cuc. capite, guld, et corpore superiore cce- 



ruleo-griseis ; alts, dorsoque nitide viridescentibus ; caudd brunneo- 



viridi singuld plumd apice albo, et marginibus pogoniorum inte- 



riorum ordine macularum albarum triangularium ornatis ; parte 



subscapulari tectricibus caudce inferioribus, crissoque rujis ; corpore 



subtus rufo-tincto-griseo. 



Heftd, throat and all the upper surface dark slate-grey ; back and 



wings glossed with green ; tail glossy brownish green, each feather 



tipped with white, and with a row of triaugular- shaped white marks 



on the margins of the inner webs ; primaries and secondaries with a 



patch of white on their inner webs near the base ; edge of the shoulder 



•white ; under surface of the shoulder, vent and under tail-coverts 



rufous ; the remainder of the under surface grey, washed with rufous ; 



bill black ; feet olive. 



Total length, 9^ inches ; bill, I ; wing, 6j ; tail, 5 ; tarsi, f . 



Hab. New South Wales. 



JRemark. — Nearly allied to C. cineraeeus of Vigors and Horsfield. 



CucuLUS DUMETOBUM. Cuc. cttpite, uropygio, colloque saturate 

 cctruleo-griseis ; alls, caudd dorsoque metallice brunneis ; apicibus 

 remigum leviter albis ; pogoniis interioribus serie macularum tri- 

 angularium parvarum ornatis; pectore griseo, rufo-tincto. 

 Head, neck and rump dark slate-grey ; back, wings and tail bronzy 

 brown ; tail-feathers slightly tipped with white and with a row of 



