H UlRDS OF ILLINOIS. 



ANALYSIS OF HIGHER GROUPS. 



Rootricos iirosoiit. 



6.' Nostrils not tubular. 



c' Uiiiil tfjo, if present, not connected with the nnlerior oiioh by a 

 nienibrane. 

 J.' BiU without frinced or somite tomia. 



«.' Anterior toos not webbed, or else legs oxccsslvely lentrth- 

 cnod. 

 /.' liower part of tibia feathered, or else toos united for 

 most of tliuir leiitrth. 

 p.' Bill not hooked, or else witlioiit core, 

 /i.' Hind too, it present, incumbent. 



«.' No web between bases of anterior toes. 

 J.' Toes 3 or 1 anteriorly. 



*.' Anterior toes cleft to the base, or 

 else not united beyond llrst |>ha- 

 Innx. 

 t' Secondaries more than il. 



m.' Middle too considerably 

 lonsor than the lateral 

 ones. 

 n.< hose of bill without 

 coro. 

 o.> Posterior half of 

 t.irsus undivided, 

 or if divided the 

 semnentsdislinet 

 fromllio.seonan- 

 terior i)orlion. 



Fasserea (Oscines). 



O.' rostcrior half of 



tArsus reticulate, 



or else anterior 



covering wrap- 



p i n K entirely 



nn>iind the outer 



a n d posterior 



sides to a croove 



on the inner 



side. .Fassores iClamatoren). 



n.' Base of bill consistinu 



of a .soft, swollen 



coro .Colamb». 



tn,« Middle toe not longer llian 

 one or the other of the 



' outoroncs 



Hacrochires (^p.ic/0. 



(.' SocondariesS Hacrochires (7Vor/i/fi). 



J'.' Anterior toes connected at ba.se for 



more than their basal phalanx 



Coccyges (Alcuones). 

 iJ Toes a anteriorly. 



A'.' Bill strongly hooked 



Fsittaci (\nrth American species). 



