DYSORNIÏHIA. =- DYSPORUS. 
73 
Dasythamnus guttulatus Burmeister, Syst. Uebers. Th. Bras. III. 81. 
leucostictus Sclater, Proc. Zool. 1858. 66. 233. Tb. 140. [Respubl. aeq. 
mentalis Cabanis, Wiegm. Archiv 1847. XIII. 223. [Brasilia. Bolivia. Peru. 
Myiothera mentalis Temminck, Pl. color. 179. Fig. 3. 
Myiothera poliocephala Prinz Wied, Beitr. Naturg. Bras. III. 1098. 
Thamnophilus mentalis d'Orbigny, Voy. Amér. mérid. 177. 
Formicarius mentalis Gray, Genera Birds I. 211. 
Dasythamnus mentalis Burmeister, Syst. Uebers. Th. Bras. III. 82. 
Dysithamnus semicinereus Sclater, Proceed. Zool. Soc. 1855. 90. Tb. 97. 
olivaceus Cabanis, Wiegm. Arch. 1847. XIII. 224. [Peru. Bolivia. 
Thamnophilus olivaceus v. Tschudi, Fauna per. 174. 
plunibcus Sclater, Proceed. Zool. Soc. 1858. 222. [Brasilia. 
Thamnophilus stellaris Spix, Aves Bras. II. Tb. 36. Fig. 2. 
Myiothera plumbea Prinz Wied, Beitr. Naturg. Bras. III. 1080. 
Dysithamnus stellaris Cabanis, Wiegm. Arch. 1847. XIII. 224. 
puncticeps Salvin, Proc. Zool. 1866. 72. [Veragua. 
rufiventris Lawrence, Ann. Lyc. New York 1865. VIII. 130. [Nova Granada. 
schistaceus Sclater, Proc. Zool. 1858. 66. 222. [Bolivia. Respubl. aeq. Peru. 
Thamnophilus fuliginosus d'Orbigny, Voy. Amér. mérid. 170. Tb. 5. Fig. 1. 
Thamnophilus schistaceus d'Orbigny, Voy. Amér. mérid. 170. 
Dysithamnus ardesiacus Sclater, Proceed. Zool. Soc. 1867. 756. 
semicinereus Sclater, Proceed. Zool. Soc. 1855. 90. Tb. 97. = Dysithamnus 
mentalis Cab. 
stellaris Cabanis, Wiegm. Arch. 1847. XIII. 224. == Dysithamnus plumbeus Sclat. 
striaticeps Lawrence, Ann. Lyc. New York 1865. VIII. 130. [Costarica. 
xanthopterins Burmeister, Syst. Uebers. Th. Bras. III. 81. [Brasilia. 
unicolor Sclater, Proceed. Zool. Soc. 1859. 141. [Respubl. aeq. 
DYS0RNITHIA (Garrulinae) Swainson, Fauna bor. amer. 1831; Classific. Birds 
1837. IL 265. = Garrulus Briss. 
Synon.: Perisoreus Bonap. 
Bill very short, conic; the base wide, the sides compressed, the tip slightly 
bent and notched. Gonys ascending. Rictus with stiff bristles, half the length 
of the bill. Nostrils concealed by incumbent feathers. Tail moderate, graduated. 
Tarsi moderate. Inner toe shortest. Claw of the hind toe but slightly curved. 
Feathers of the back very long and soft. 
brachyrhynchus Swainson, Fauna bor. americ. II. Tb. 55. = Garrulus cana- 
densis Swains. 
canadensis Swainson, Classific. Birds II. 265 (Wilson 20) = Garrulus cana- 
densis Swains. 
infaustus Swainson, Classific. Birds II. 265. = Garrulus infaustus Vieill. 
DYSPORUS (Pelecanidae. — hvoKOÇQÇ inops) Illiger, Prodr. Syst. 1811. 279. 
= Sula Briss. 
Rostrum capite paullo longius, crassiusculum, rectum, elongatoconicum acu- 
minatum, compressum, supra rotundatum, mandibulis aequalibus; maxillae parte 
culminali sulco longitudinali, pone apicem in tomium excurrente, distincto, ita ut 
maxilla e partibus tribus longitudinalibus composita videatur, culmine in apicem 
deflexo; mandibulae gonyde recta porrecta, versus mentum sulco distincta. Tomia 
oblique incisula. Nares apparentes nulla e. Lingua minuta ovalis. Facies et in- 
gluvies saccata, implumes. Alae volatiles, tuberculatae. Cauda rotundata àut 
cuneata. Pedes breves, congrui, aversi, tetradactyli , stegani. Digitus externus 
lomate exterius auctus, secundo, tertius externo brevior, hallucaris posticus tertium 
dimidium aequans. Ungues médiocres falculares, secundus acie interna pectinatim 
incisula. Tarsotheea reticulata. Aerodactyla basi reticulata, apice scutulata. 
bassanus Illiger, Prodr. Syst. 279. = Sula bassana Briss. 
brasiliensis Rüppell, Syst. Uebers. NO. Afr. 140. =± Sula parva Gray. 
capensis Sundevall, Ann. mag. nat. hist. 1847. XIX. 236. == Sula capensis 
Lichtst. 
