186 CICONUD^. 



Eab. Mexico, both coasts {Sumichrast ^% Mazatlan [Bischoff^^, Grayson i<» ^^), Tampico 

 {Bichardson^o), Alta Mira {Armstrong ^% San Andres Tuxtla, Vera Cruz (Salle ^), 

 Cateman {Boucard -), La Antigua {Trujillo ^% Atoyac {Mrs. H. H. Smith 20), Jalapa 

 {de Oca 3), Plan del Rio, Santa Ana {Ferrari-Perez 20), Paso de la Milpa {Ferrari- 

 Perez^^), Tehuantepec {Bichardson^"), Santa Efigenia {Suniichrast^^), N. Yucatan 20, 

 Rio Lagartos ^\ Cozumel I. ^ ^o (Gaumer) ; British Hoxdueas, Grassy Cay {0. S. ^) ; 

 Guatemala, Atlantic coast (Skinner*), Pacific coast*, Las Salinas 20 (0. S.) ; 

 NiCAKAGUA, Rio Escondido (Bichmond^^^^), Momotombo {Bichardson^% Ometepe 

 I., Lake of Nicaragua {Nutting ^^) ; Costa Rica («. Frantzius'^^), Rio Grande 

 {Cooper^), Pozo Azul de Pirris, Las Trojas {Zeledon'^% Rio Frio (Bichmond ^^) , 

 La Palma, Gulf of Nicoya {Nutting ^^) ; Paxama {M'Leannan ^), Mina de Chorcha 

 {E. Arce ^ -% Lion Hill Station {Brown ^^). 



The northern form of Boatbill, C. zeledoni, is, like Tigrisoma cabanisi, a species 

 peculiar to the Central-American subregion, where it is plentifully distributed in 

 suitable localities. 



Salvin found it on different occasions on the Cays of British Honduras and in 

 Guatemala, skulking in the mangroves, also amongst the forest-swamps on the Pacific 

 coast. In Costa Rica Mr. Nutting met with Boatbills associating in small flocks 

 like Night-Herons, which they resemble in their harsh croak and in their nocturnal 

 habits. Mr. Richmond noticed several colonies on the Rio Frio. 



Nothing has been recorded of the nidification of this bird. 



Pam. CICONIID^. 



The Storks resemble both the Herons and the Cranes in outward appearance, and 

 their young require, like those of the former, to be fed by their parents for some time. 



The characters which divide the Storks from the Herons are : the elevation of the 

 hallux or hind toe, which is not on the same level as the others, the absence of powder- 

 down patches on the body, and the comb on the claw of the middle toe. There are 

 also several other distinctions between the two families, osteological and otherwise. 



The Ciconiidse are divisible into two subfamilies — the true Storks (Ciconiinae) and 

 the Wood-Ibises (Tantalinse), both of which are represented in the New World. 



Subfam. CICONIINM. 

 All the true Storks have a powerful and straight bill, with no downward curve at 

 the end of the mandibles. Mr. Ridgway has given a very complete account of the 



characters which distinguish the Ciconiinae, from which we select the following : " Bill 



elongate-conical, acute, compressed, the end not decurved. Nostrils lateral rather than 



