EVENING GROSBEAK. 221 



M. Lesson, under the name of Coccothraustes Bonapartii. The Prince 

 of Musignano, it is observed, has erred in stating that "no difference of 

 any consequence is observable between the sexes; though it might be said 

 that the female is a little less in size, and rather duller in plumage." 



Genus XVIII.— PYRANGA, Vieill. SUMMER RED-BIRD. 



Bill of moderate length, robust, tapering, compressed toward the end, acute; 

 upper mandible with its dorsal line declinate and considerably convex, the 

 ridge rather narrow, nasal sinus very short and wide, the sides convex, the 

 edges sharp, slightly arched, with a festoon about the middle, the notches 

 distinct, the tip very slender, declinate; lower mandible strong, with the 

 angle short and rounded, the dorsal line straight, the sides convex, the edges 

 direct, the tip acute. Nostrils basal, round. Head ovate; neck short; body 

 compact. Tarsus short, with seven scutella; toes rather small, the first 

 moderate, the outer slightly longer than the inner, and adherent at the base. 

 Claws moderate, well arched, much compressed, laterally grooved, acute, 

 those of the first and third toes equal. Plumage soft and blended; distinct 

 bristles at the base of upper mandible. Wings rather long, with the second 

 and third quills longest, the first little shorter. Tail of moderate length, 

 emarginate. Upper mandible concave, with three longitudinal ridges; tongue 

 somewhat triangular, convex above, with the point thin-edged and lacerated; 

 oesophagus dilated about the middle; stomach broadly elliptical, small, its 

 lateral muscles rather small; epithelium thin, longitudinally rugous; intestine 

 short; cceca extremely small. Inferior laryngeal muscles four on each side, 

 but very small. 



Vol. III. 36 



