NATURAL SCIENCES OF PHILADELPHIA. 273 



presented by Dr. Thomas B. Wilson, seem to be C. Fraseri, Sclater, as above, 

 and are only different in having the under parts of the body and the super- 

 ciliary lines more strongly tinged with rufous, though my impression is that 

 they are specifically identical with D'Orbigny's bird. 



One specimen in the Museum of the Smithsonian Institution is the most 

 mature and strongly characterized that I have seen, and is very nearly as 

 represented in D'Orbigny's plate, above cited. It is quite possible that C. 

 Fraseri is the young of a species allied to the present, but not identical. 



6. Genus DIGLOSSA, Wagler, Isis, 1832, p. 280. 



A. IHglossa. 



1. Diglossa baritula, Wagler. 



Diglossa baritula, Wagl., Isis, 1832, p. 281. 

 Uncirostrum Brelayi, Lafres., Rev. Zool., 1839, p. 281. 

 Uncirostrum sittaceum, Lafres., Rev. Zool., 1839, p. 292. 

 Gray's Gen. B., i. pi, 42. Reich., Voeg., fig. 3762, 3763. - 

 Allied to and resembling the next two species, but easily distinguished from 

 either, when in adult plumage, by the darker shade of color of the upper parts, 

 and by the extension of the same color on the sides of the neck and throat, 

 though there is usually a narrow space on the latter communicating with and 

 of the same rufous as the under parts of the body. This species is about the 

 same size as D. similis, with which it can readily be confounded. It is smaller 

 than D. sittoides. Mr. Gray gives this little species with his usual great care 

 and accuracy in the plate above mentioned. 

 Specimens are labelled "Mexico." 



2. Diglossa similis, Lafresnaye. 



Diglossa similis, Lafres., Rev. Zool., 1846, p. 318. 

 Diglossa hyperythra, Cab., Mus. Hein., i. p. 97 (1850). 



Reich., Voeg., fig. 3764. 



Numerous specimens, generally labelled " Bogota " and " Columbie." This 

 species is about the size of the preceding (Z>. baritula), and much resembles 

 it, but is readily distinguishable by its throat being clear rufous, uniform with 

 the other under parts. It resembles, even in a greater degree, the next spe- 

 cies {D. sittoides), and in adult plumage is distinguishable only, so far as I 

 can see, by its smaller size. The female of this species seems to present a 

 peculiar character in having the under parts of the body with longitudinal 

 stripes of dull olive, not very distinct, but to be traced in all specimens that 

 have come under my notice. Dr. Reichenbach's figure, cited above, is a 

 good representation of this little bird. 



3. Diglossa sittoides, (D'Orbigny et Lafresnaye). 



Serrirostrum sittoides, D'Orb. et Lafres., Mag. Zool., 1838, p. 25. 



Uncirostrum Orbignii, Boiss., Rev. Zool., 1840, p. 5 ? 

 D'Orb., Voy. Am. Ois., pi. 58, -fig. 3. Reich., Voeg., fig. 3766. 

 Young birds, labelled " U. Orbignii" are in the Acad. Mus., but the adult 

 is in the Museum of the Smithsonian Institution, and is precisely as given by 

 Mons. D'Orbigny in the plate cited. This species is larger than either of the 

 two preceding species, but is exceedingly similar in other respects to D. si- 

 milis. The specimen now before me has the under parts rather paler rufous, 

 but is, in fact, scarcely distinguishable from that species, (/). similis,) by 

 any other character than its greater size, though I have no doubt that it is 

 quite distinct, specifically. From Bolivia. I regard it as possible that this 

 bird is the young or female of D. brunneivenlris, Lafresnaye. 



B. Tephrodiglossa. 



4. Diglossa carbonaria, (D'Orbigny et Lafresnaye). 



Serrirostrum carbonarium, D'Orb. et Lafres., Mag. Zool., 1838, p. 25. 



1864.] 18 



