2J. CnV.RKiK, List of Bir<i.< of Sun yos!\ Co^ta Rica. [January 



d. Bill moder.Tte. ...... hiruiidinacea. 



d' . Bill much thickened. ...... gnatho. 



c'. Middle of belly not white, and outer tail-feathei s not al- 

 ways with white marks on the inner webs (never present 

 in elegaiitisstma or females of other species.-'). 

 d. Adult birds with crown blue and foreheati chestnut; 

 voting' without obvious chestnut on forehead and onlv 

 taint indications of blue on crown. . . elegantiasivia. 



d' . Crown not blue. 



e. Males Avith shining blue-black thi-oat. Females, 

 forehead chestnut and middle of belly tawny ochra- 

 ceous. .... .... gracilis. 



e' . Males, throat and entire under parts yellow Fe- 

 males without tawny ochraceous on belly or chestnut 

 forehead. ....... laniiroxlris. 



43. Euphonia elegantissima. — In the immediate vicinity of San Jose I 

 have taken only a single example, but a short'distarice out they are a not 

 uncommon resident. 



An abnormally colored adult female in the Museum collection has the 

 upper parts and sides of head dusky greenish olive-gray ; the top of head, 

 forehead, chin and throat are normal, the rest of the lower parts are bluish 

 gray, whitish in middle of belly. 



Rufhonia ajjinis. — I have never taken examples here in the wild state, 

 but they are frequently brought to the San Josfi market. 



Euphonia anncB. — Not taken at San Jose, but frequently seen in cages. 



44. Euphonia luteicapilla. — A rather rare bird about San Jos6. 

 Young males are indistinguishable from the females. As the bird grows 



older the characters of the male begin to show themselves in black in the 

 loral region and a \ellowish shading on the forehead and sides of the 

 crown. Then a few scattering black feathers appear in the throat, and 

 lastly the breast begins to assume an orange tint. I'"ully adult plumage is 

 not attained, I think, until the second year. 



45. Euphonia gracilis. — ^I took an adult male Dec. 30, 1890. The bird 

 was in full song, and the plumage showed no signs of having been in a 

 cage. However, the home of this species is on the southwest Pacific 

 coast. For further observations on this species see Proc. U. S. Nat. Mus., 

 Vol. XIV, p. 530. 



46. Euphonia hirundinacea. — A rare bird about San Jose, but of rather 

 wide distribution in the country, chiefly on the Pacific side from the coast 

 to an altitude of about 7000 feet. They are frequently seen in cages at 

 San yose. Young males resemble females. The transition to adult plum- 

 age seems to be accomplished very slowly. 



Sr. Don Anastasio Alfaro who has had frequent opportunities for ob- 

 serving the nesting of this bird gives me the following interesting note. 

 The nest is constructed in a hole in the ground, frequently the bank of 

 some stream or by the roadside where the grading of the road has left 



