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Genus BOLBORHYNCHUS Bonaparte.
Bolhorhynchus Bonaparte, Remarques Obs. Blanchard Psittacides, 1857, 6.
(Type, B. catharina Bonaparte =PsiiiacttZa lineola Cassin.)
Grammopsittaca c Ridgway, Proc. Biol. Soc. Wash., xxv, May 4, 1912, 100.
(Type, Psittacula lineola Cassin.)
Very small, wedge-tailed Psittacidse (length about 55-70 mm.)
with tarsus as long as or longer than culmen; the maxilla very broad,
swollen laterally, broadly rounded on culmen, with unguis short
and very broad, its tomium very shallowly notched and lobed; cere
strongly convex anteriorly, wholly unfeathered around nostril (the
latter set well back) ; outermost primary not attenuated at tip ; tail
not more than two-thirds (sometimes scarcely more than half) as
long as wing, and coloration wholly green or green with black bars
and spots.
BiU rather small but very thick and swollen, its depth at base very
much greater than its length; maxilla decidedly wider than deep,
its width at base equal to three-fourths the length of culmen, the
unguis short and very broad, its width at base of palatal surface decidedly to very much greater than its length, the tip broadly rounded
in vertical profile; maxillary tomium very faintly if at all lobed
posterior to the very shallow post-ungual excision; depth of mandible at base decidedly less than width of mandible, about equal to
length of gonys; mandible broadly rounded beneath, its tip very
slightly if at all produced, very broad; culmen about as long as outer
bind toe without claw, gradually and not very strongly dccurved
from base, broadly rounded. Wing moderate, very pointed, the
longest primaries exceeding secondaries by nearly to quite half the
length of wing; ninth or tenth (outermost) primaries longest, the
tenth not attenuated at tip. Tail very slightly more than haK to
two-thirds as long as wing, graduated for about one-third its length,
the rectrices rather broad basally, tapering rapidly to the acuminate
or subacuminate tip. Tarsus equal to or slightly longer than outer
hind toe without claw.
Plumage and coloration.—Head completely feathered except a
restricted orbital area, cere surrounding nostril, and chin. Color
wholly green or green barred and spotted with black.
Range.—Southern Mexico to Venezuela, Peru, and Bolivia. (Two
species.")
KEY TO THE SPECIES AND SUBSPECIES OF BOLBORHYNCHUS.
a. Rump and tail-coverts barred or transversely spotted with black; hindneck, etc.,
narrowly barred with black. {Bolborhynchus lineola.)
b. Rump and upper tail-coverts with small terminal spots or bars of black; middle
rectrices with much less of black; general color purer, lighter green. (Eastern
Mexico to Panama.) Bolborhynchus lineola lineola (p. 179).
bb. Rump and upper tail-coverts heavily spotted with black; middle rectrices
with much more of black (sometimes almost wholly black); general color
deeper, more olivaceous, green. (Eastern Peru?)
Bolborhynchus lineola maculatus (extralimital).&
aa. No black markings whatever. (Peru; Bolivia.)
Bolborhynchus andicola (extralimital).c