622 OHIO BIRDS. 



Decurved. Gradually cnrved downward. 



Dentirostral. Having the bill notched as if toothed. 



Dressed. Flattened vertically. Opposite of Compressed. 



Desmognathous. Having the palate bones united. 



Diagnostio. Distinctively and exclusively characteristic. 



Diaphragm. Midriff ; mnsculo-tendinous partition between thorax and abdomen, rudi- 

 mentary or wanting in birds. 



Dichromatic. Of two colors, as the " red " and " gray " plumages of Scopa asio. 



Divaricate. Branching off ; spreading apart, curving away. 



Dorsal. Pertaining to the back. 



Dorsum. Back ; upper surface of trunk from neck to rump. 



Down. Small soft feathers of plumulaceous structure, generally growing about the 

 roots of plumce and concealed by them. 



Duslcy. Of any undefined dark color. 



E 



Eared. Having lengthened or highly colored auricular or other feathers on the side of 



the head. 

 Emarginate. Notched at the end ; slightly forked, especially in case of a tail so shaped ; 



also notched, or abruptly narrowed along the edge in its continuity, as the border of 



many a wing- quill. 

 Epignaihoua. Hook-billed. 



Erectile. Susceptible of being raised, as a crest. 



Erythrism. A particular state of phimage characterized by excess of red pigment. 

 Even. Having all the feathers of equal length. 



F 



Falcate. Sickle-shaped ; scythe-shaped. 



Family. Systematic group of the grade between order and genus, generally distinguished 

 or denoted by the termination -ides. 



Femoral. Pertaining to the thigh, or part of leg from hip to knee. 



Fenestrate. Furnished with openings. 



Ferrugineous or Ferruginous. Rusty-red. 



Filiform. Thread-like. 



Fissipalmate. Lobed and semipalmate as a grebe's foot is. 



Fissiped. Having cleft toes Opposed to Palmiped. 



Fissirostral Having t he bill cleft far beyond the base of its horny part. 



Flank. Hinder part of side of trunk. 



Forehead. Front of head from bill to crown. 



Foreneck. Whole front of collnm, from chin to breast ; whole throat. 



Forficate. Deeply forked. 



Forked (tail). Having the outer feathers longest, the rest gradually successively short- 

 ening to the middle pair ; when these are again lengthened somewhat, the tail is said 

 t3 be doubly forked. 



Fossa, fossa Used chiefly in the plural to denote the pits or grooves in which most 

 birds' nostrils open. 



Fossmial. Digging into the earth for its habitation. 



Free. Said of the leg when not enclosed fo the knee in the common integument of the 

 body. 



