VOI,. XIV, 

 1891. 



] PROCEEDINGS OF THE NATIONAL MUSEUM. 475 



gentleman on the island of Onietepec, in Lake Nicaragua.* The La 

 Palnia .specimen agrees minutely in colorajtion witli the female from 

 Ometepec, the only difference worth mentioning being the very slightly 

 darker color of the i)ileum. In size it is somewhat less, though not so 

 much so as the female from Jimenez, described above. 



5. Picolaptes gracilis, Ridgw.t 



A specimen (male) collected by Mr. Alfaro at Cobiade Salinas July 9, 

 .1800 (No. 5085, Mnseo Nacional de Costa Rica), is much bke the tyi)e of 

 this supposed species, but has the ground color of the anterior ui)i)t'r 

 l)arts(back included) browner, with the dusky streaks margining the pale 

 median streaks quite obsolete on the back, these pale streaks being 

 also more fulvous. The ground color of the under parts is also paler. 

 The bill is exactly the same length, measured both from the nostril and 

 from the base of the culmen, though it seems longer; but it is some- 

 what stouter, as well as less distinctly curved. 



I have now little doubt that botli these specimens are young birds 

 of P. conqtressHS, ami not a distinct species. 



6. Scytalopus argentifrons, sp. uov. 



Sp. Chak: Adult male (No. 121:329, U. S. National Museum, Volcau 

 de Irazu, Costa Kica, April 23, 1891; Anastasio Alfaro): Forehead 

 and anterior portion of crown silvery gray; i: hind neck, back, and 

 scapulars dusky brownish slate-color; wings similar but a ver^Mittle 

 bit more brownish, the tertials haviug indistinct rusty terminal mar- 

 gins; lower back dusky brownish, chaugiug to a more rusty brown on 

 rump and upper tail-coverts— only the tips of the feathers thus colored, 

 however, their entire concealed portion being uniform leaden slate- 

 color; tail uniform dusky brownish slate, like wings. Head (except 

 as already described) and under i)arts as far back as the belly, plain 

 dull slate-color, paler, or in fact inclining to whitish, on middle of the 

 belly and having a hoary or silvery cast about the head in certain 

 lights; Huffy Hank-feathers clear mummy brown, marked with rather 

 broad curved bars of blackish; femoral and anal regions simdar, but 

 ground color paler (nearly cinnamon); under tail-coverts light tawny- 

 brownish, indistinctly barred with dusky. Under surface of the wing 

 jilain dusky brownish gray, the edges of the remiges pale drab. IJill 

 black; tarsi brownish black on outer side, light olive on inner side 

 toes light horn-color or olive. Length (skin), 4.30; wing, 2.15; tail 

 l.GO; exposed culmeu, .15; tarsus, .80; middle toe, .68. 



*Cf. Proc. U. S. Nat. Mns., Vol. vi, pp. 39:?, 394. 



tPioc. U. S. Nat. Mas., Vol. xi, Sept. 20, 18d9, p. 542. 



t Uufortuiiately tbc whole liiiulin- crown aiid occiput have been shot away; hut 

 another spccinien (sex not (.letorniiued) has tlicse parts dnll brownish, the feathers 

 slaty on the basal portion. 



