612 BIRDS FROM COSTA RICA — RIDGWAY. 



some specimens showing a faint transverse freckling of a paler tint on 

 the belly and other posterior portions. 



Two immature females in the same collection diftcr from an adult 

 (possibly a young male) in the collection of the U. S. Xational Museum 

 from Greytown, ^Nicaragua (No. 40448, June 14, 1865, H. E. Holland), 

 in the darker and richer color of the u])per ])arts, the back being olive- 

 brown in contrast Avith the olive-color of head and neck; wing mark- 

 ings rather deeper, especially the edges of secondaries; under parts 

 considerably more richly colored, the prevailing hue being yellowish 

 olive, clearing to olive-yellow on abdomen, under tail-coverts, etc., these 

 parts in one specimen (No. 34()5, Jimenez, August 12, 1889, A. Alfaro) 

 being almost canary yellow,* while the yellow covers nearly the whole 

 anterior portion of the under surface. 



7. Platypsaris aglaiae obscurus Kidgw. (rroc. V. S. Nat. Mns., xiv, 1891, p. 474.) 



An adult male (No. r)4()9, Museo Nacional de Costa Eica), obtained 

 at the same time and place with the type of P. a. obscurus, is similar in 

 color to the type on upper i)arts, but is paler beneath, especially on 

 the throat, where there is not the slightest indication of the dusky 

 spotting, so conspicuous a feature in the type. In fact, the whole 

 throat, especially its lower portion, is considerably paler than any other 

 part of the lower surface, except under tail-coverts and anal region, 

 the color being a pale, slightly brownish, gray. The average bue of the 

 under parts is very nearly the same as in the type of P. a. li}/pop}ia'us^i 

 and still more like another specimen of that form (No. 1 1*0204, U. S. 

 Nat. Mus.). From all the males of the latter form, however, it may be 

 distiuguished by the decidedly smaller size, large white spot at base of 

 inner web of outer primary, and correspondingly more extended white 

 patch covering the basal portion of other primaries on the under sur- 

 face. Measurements are as follows: Length (skin), 0.50; wing, 3.30; 

 tail, 2.35; exposed culmen, 0.58; tarsus, 0.82; middle toe, 0.48. 



Two additional females from the same locality agree essentially with 

 the one originally described, and differ even moie from tbe La Palma 

 specimen doubtfully referred to P. a. J<(tirostris [cf. Proc. U. S. Nat. 

 Mus., XIV. 1891, 1). 474). No. 5410 (.Museo Nacional de Costa Rica), 

 Jimenez, February 7, 1891, has the upper parts vSomewhat mcae intense 

 chestnut-rufous, Mitli none of the grayish-brown tinge seen on the back 

 of the tyi)e female; the black of the pilenm, however, is slightly mixed 

 with dull rusty brown. The under parts are rather deei)er ochraceous 

 than in the type. Length (skin), 0.00; wing, 3.30; tail, 2.45; exposed 

 culmen, 0.58; tarsus, 0.7S. "Iris black; bill and feet, horn-color." 



No. 3401 (Museo Nacional de Costa Kica), Jimenez, August 6, 1889, ' 

 A. Alfaro, is still deeper in color, the upper parts tending more de- 

 cidedly toward chestnut, and the lo\\('r surface quite uniform, deep 



* This. example is not sexed, iuid may be a yoimo; male. 



fProc. U. S. Nat. Mus. xiv, 1891, p. 467. (Interior of lloiidiiras.) 



