1/6 STRUCTURAL AND SYSTEMATIC ZOOLOGY 



down abruptly at the tip. Representatives are the 

 tyrant flycatchers (Fig. 159). b. Oscines, or songsters, 



FIG. 162. White eyed vireo (Fz>v0 noveboracensis). United States. 



all of whom have a vocal apparatus, though not all sing. 

 The anterior face of the tarsus is one continuous plate, 

 or divided transversely into large scales ; and the plates 

 on the sides meet behind in a ridge. The toes, always 

 three in front and one behind, are on the same level. 

 The eggs are usually colored. Here belong the 

 crows, jays, birds of paradise, blackbirds, orioles, larks, 



FIG. 163. Swallow (Hirundo). 



sparrows (Fig. 160), tanagers, finches, waxwings, swal- 

 lows (Fig. 163), wrens, warblers (Figs. 161, 162), 

 thrushes, etc. 



