GUIEACA.— 0EYZ0B0EU8. 347 



This bird, as already stated, differs from G. concreta in the colour of its plumage, 

 which is of a clearer blue shade, the forehead and cheeks being of a still paler colour. 

 It was originally described by Lafresnaye from Panama specimens, and it has since been 

 traced southwards through Colombia ^ to Western Ecuador ^. 



4. Guiraca parellina. 



Pringilla parellina, Licht. Mus. Berol.^ 



Cyanoloxia parellina, Bp. Comp. Av. i. p. 502 ^ 



Goniaphea parellina, Scl. P. Z. S. 1856, p. 303 ' j 1857, p. 228 * ; Baird, Mex. Bound. Surv. ii. 



Birds, p. 17". 

 Cyanospiza parellina, Sumichrast, Mem. Bost. Soc. N. H. i. p. 551 °. 

 Guiraca parellina, Scl. P. Z. S. 1859, pp. 365 ^ 378'; Lawr. Bull. U. S. Nat. Mus. No. 4, p. 20'; 



Mem. Bost. Soc. N. H. ii. p. 276 " ; Boucard, P. Z. S. 1883, p. 444". 



G. conoretcB et G. eyanoidi affinis, sed multo minor ; fronte, genis, uropygio et tectricibns alarum minoribus laete 

 csBroleis. Long, tota 4'8, alsB 2'7, caudse 2-2, tarsi 0'7. (Descr. maris ex Jalapa, Mexico. Mus. 

 nostr.) 



5 fusca, subtus dilutior, gula et abdomine medio fere albicantibus, alis et Cauda fi^seo-nigris. (Descr. feminse 

 ex Mazatlan, Mexico. Mus. nostr.) 



Eab. Mexico 2 4j Sierra Madre, Nuevo Leon(CoMC^^), Presidio, near Mazatlan (Forrer), 

 Manzanilla Bay (Xantus ^^), State of Vera Cruz {Sumichmst ®), Alvarado {Deppe ^ ^), 

 Cordova {Salle 3), Jalapa {de Oca ^), Totontepec ^, San Andres Tuxtlia * {Boucard), 

 Tehuantepec City, Huallago {Sumichrast ^), Merida in Yucatan {Gaumer ^^). 



This is a miniature form of the South- American G, eyanea, and more closely related 

 to it than to G. concreta, which, like G. parellina, is a Mexican bird. The first speci- 

 mens of this species which were sent to Europe were probably those obtained by Deppe 

 at Alvarado, in Mexico, and which remained under a MS. name of Lichtenstein's until 

 Bonaparte described them in 1850. It has since been found nearly everywhere in the 

 hotter parts of Mexico, from the Northern States of Nuevo Leon and Sinaloa to 

 Tehuantepec and Yucatan. Hardly anything has been recorded of its habits; and 

 Sumichrast merely remarks that the limit of its upward range does not exceed about 

 2600 feet 6. 



ORYZOBOEUS. 



Oryzoborus, Cabanis, Mus. Hein. i. p. 151 (1851). 



In this genus are included several species allied to Spermophila, but with much 

 stouter bills. They are spread over tropical America from Southern Mexico to South 

 Brazil, but are absent from the Antilles. Two species occur within our limits. Some 

 of the forms are not very definite, and we have little doubt that of the species now 

 recognized several will have to be withdrawn. The characters upon which their 

 distinction is based are decidedly variable, especially as regards the size of the bill. 



44* 



