PYRRHURA.—BOLBORHYNCHUS. 579 
Hab. Costa Rica’, Aguas Calientes (Hoffmann!®, Boucard’), Candelaria Mts. 
(v. Frantzius+, Boucard®), Navarro (Cooper 2), Dota Mts., Angostura, Frailes 
(Carmiol*); Panama, Volcan de Chiriqui, Veraguas (Arcé 5). 
Pyrrhura hoffmanni belongs to a small section of the genus which, having no brown 
patch of feathers on the lower back, has no distinct bars on the underside but red 
ear-coverts; the tail above is olive, but beneath reddish brown, and the base of the 
quills yellow. These characters taken together distinguish it from P. hematotis and 
P. rhodocephala, which are, perhaps, its nearest allies. 
This Parrot was discovered by Dr. Hoffmann, and was described by Dr. Cabanis in 
1861 4, when the collections sent by the former to Berlin first revealed the richness of 
the ornithological fauna of Costa Rica. The specimens were obtained at Aguas 
Calientes, near Cartago, where M. Boucard also found the species, as well as at the 
foot of the Candelaria Mountains’. He says that the conspicuous colour of the wings, 
alluding no doubt to the yellow bases of the primaries, renders a flock of these birds a 
beautiful object when flying. 
In the State of Panama P. hoffmanni is not uncommon on the Volcan de Chiriqui, 
and it is found further to the eastward, but is not known to occur on the Isthmus or 
any point south of it. | 
BOLBORHYNCHUS. 
Bolborhynchus, Bonaparte, Compt. Rend. xliv. p. 596 (1857) ; Salvadori, Cat. Birds Brit. Mus. xx. 
p. 233. 
In Bolborhynchus and in the two following wedge-shaped tailed Parrots the orbital 
ring, according to Count Salvadori, is incomplete, the opposite being the case in the 
genera just discussed. Bolborhynchus itself may be distinguished from Brotogerys by 
its more swollen bill, the maxilla being more rounded; the cere is tumid, with a 
few short inconspicuous isolated bristles, the nostrils being fully exposed. ‘The tail is 
of moderate length, bluntly cuneate, each rectrix acute. The tomia of the maxilla 
undulating but scarcely toothed. There is a tufted oil-gland and complete furcula 
(Salvadori); but no difference in the plumage of the sexes. 
Seven species are known of the genus. ‘These are distributed over nearly the whole 
of Tropical America from Southern Mexico to Argentina. Only one species, and that 
a well-marked one, occurs within our limits. This is probably peculiar to the 
mountainous parts, but it is said to occur also in Venezuela. 
1. Bolborhynchus lineolatus, 
Fsittacula lineola, Cassin, Pr. Ac. Phil. vi. p. 872'; Journ. Ac. Phil. iii. p. 154, t. 14. f. 17. 
Conurus lineola, Scl. P. Z. 8. 1864, p. 177°. 
Myjiopsitta lineola, Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 124°. 
_ Psittacula lineolata, Scl. P. Z. 8. 1856, p. 306’. 
