342 NEW BIRDS FROM COSTA RICA — CHLRRIE. 



Basileuterus salvini, sp. uov. 



I shall call the Guatemala bird Basileuterus salvini, and select as type 

 Ko. 30700, U. S. National Museum, from Cobau, Vera Paz, November 

 15, 1859 (received from O. Salviii). This is tlie !>ird described by Pro- 

 fessor Baird as B. delattrii ia his " Review of American Birds," \). 249, 

 aud I cau not do better than reproduce his description: "Simih\rlo 

 rujifrons in color of head, the olive-green of the back brighter, this color 

 invading and replacing the ashy of the nape and sides of the neck; the 

 iufraocular white band, less distinct behind, but apparently extending 

 behind the eyes. Whole under parts greenish yellow, a little paler on 

 middle of belly; flanks olive-green ; the sides behind and crissum tinged 

 with fulvous. Wings much rounded, about equal to the lateral tail- 

 feathers; first quill shorter or not longer than the secondaries, as is the 

 case in rujifrons.''^ 



With the above arrangement the geographical distribution of the 

 species would be about as follows : Rufifrons is confined to Mexico, 

 saloiui to Guatemala, delattrii to Nicaragua and Costa Kica, while rnesn- 

 chrysus occupies the territory south into Colombia. 



The two latter are closely related and it seems questionable if the 

 two forms do not intergrade. The chief difference appears to be in a 

 darker head and a darker olive-green of the upper parts in general of 

 the Costa Rica bird, the white spot behind the ear-coverts is, I believe, 

 an untrustworthy character, and the grayish nuchal band is hardly more 

 so. Accordingly, I would reduce mesochrysus to subspecitic rank, mak- 

 ing it Basileuterus delattrii mesochrysus (Sclater). 



GraDaria lizaiaoi, sp. uov. 



Similar to G.perspicillata, but ashy above, with olive shading on the 

 back, the back markings confined to very narrow (almost obsolete) ful- 

 vous shaft-streaks. Below, the black stripes on breast and sides are 

 much broader. Tiie black rictal strii)e is clearer and better defined. 



Adult ).iale (type No. 119951,* U. S. National Museum, Trojas, Costa 

 Rica, January 1880, Anastasio Alfaro) : Above, ashy or slate-gray, the 

 back shaded with olive; interscapulars with faint fulvous shaft-streaks; 

 wings and tail sepiabrown ; i)rimaries broadly edged (including almost 

 the entire web) with ochraceous; median and lesser wing-coverts and 

 scapulars olive browinsh tipped with buft'y : greater coverts vandyke- 

 brown tipped with burnt-sienna ;t primary coverts clove-brown. Below 

 white, the breast and sides more or less buffy ; broad black stripes on 

 the breast, extending to the flanks but growing less distinct posteriorly. 

 Flanks and sides have an olivaceous shading. Under surface of the 

 wing ochraceous. " Bill black ; base of lower mandible white ; legs and 

 feet very light plumbeous." (Zeledon MS.) 



*No. 628, Coll. Museo Nacioual de Costa Kica. 



t This is probably a character of the yoiiug or seasonal, as a May example has the 

 greater coverts like the mediau aud lesser ones. 



