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Atta, a subgenus of Atta, which is a genus of Attii, which is a tribe of Myrmicinæ, which is a subfamily of Formicidæ," etc.
Doctor Chapman says of the brown heads: "They are talkative sprites, and, like a group of school children, each one chatters away without paying the slightest attention to what his companions are saying." The fourth member of the Sittinae subfamily in America is the pigmy nuthatch, known scientifically as Sitta pygmaea, a genuine westerner, not known east of the plains.
The Tennessee warblers were also singing near at hand, giving me a good opportunity to compare the arias of the two species. Belonging to the same subfamily is the orange-crowned warbler.
But the three genera on the left hand have, on this same principle, much in common, and form a subfamily, distinct from that containing the next two genera on the right hand, which diverged from a common parent at the fifth stage of descent.
Instances could be given among plants and insects, of a group first ranked by practised naturalists as only a genus, and then raised to the rank of a subfamily or family; and this has been done, not because further research has detected important structural differences, at first overlooked, but because numerous allied species, with slightly different grades of difference, have been subsequently discovered.
And, as if to make the case as striking as possible, this cirripede was a Chthamalus, a very common, large, and ubiquitous genus, of which not one species has as yet been found even in any tertiary stratum. Still more recently, a Pyrgoma, a member of a distinct subfamily of sessile cirripedes, has been discovered by Mr.
The horizontal lines may represent successive geological formations, and all the forms beneath the uppermost line may be considered as extinct. The three existing genera, a14, q14, p14, will form a small family; b14 and f14, a closely allied family or subfamily; and o14, i14, m14, a third family.
Gorals and serows belong to the subfamily Rupicaprinae which is an early mountain-living offshoot of the Bovidae; it also includes the chamois, takin, and the so-called Rocky Mountain goat of America. The animals are commonly referred to as "goat-antelopes" in order to express the intermediate position which they apparently hold between the goats and antelopes.
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