300 Bangs, Birds from Western Costa Rica. [jrlllv 



Characters. Similar to true D. sancti-thoma (Lafr.), and of about the 

 same size, but differing in color and markings as follows: head duller, 

 more rusty, less yellowish or oehraceous; back less heavily marked with 

 blackish cross bars; ground color of under parts slightly darker, more 

 tawny, less oehraceous; the black bars on the feathers of under parts much 

 narrower and more blended with the general color of the feathers, pro- 

 ducing the effect of a fine and rather indistinct dusky cross-barring below. 

 In true D. sancti-thomai, the bars on the under surface are wide, black, 

 and stand out in bold relief against the paler, yellower, ground color. 



Measurements, adult tf,type: Wing, 124; tail, 116; tarsus, 26.5; cul- 

 men, 40.5. Adult $, No. 19142, Boruca, Costa Rica, wing, 118; tail, 

 106; tarsus, 26.5; culmen, 39. 



Remarks. This form — a fairly well marked subspecies of D. sancti- 

 thomoe — appears to be confined to western Costa Rica. Specimens from 

 eastern Costa Rica, — Juan Vinas and Cariblanco de Sarapiqui — ■ being 

 extreme examples of true D. sancti-thomm, to which I also refer skins 

 from Divala, Chiriqui, though these are not so extreme. 



In all probability Lafresnaye's type of Dendrocops sancti-thomai came 

 from the town of Santo Tomas, near Orma, Honduras. It had been 

 supposed by some ornithologists that Lafresnaye bestowed this name on 

 his bird thinking it came from the island of St. Thomas in the West Indies 

 (see Salvin and Godman, Biol. Cent.-Am., Vol. II, p. 192). Skins from 

 Honduras are similar in all respects to those from eastern Costa Rica. 



TYRANNIDiE. 



Placostomus superciliaris {Lawr.). Nineteen specimens, both sexes, 

 Boruca, Pozo del Rio Grande and Paso Real, April-August. 



Rhynchocyclus brevirostris (Cab.). Six adults, both sexes, Boruca 

 and Poso del Rio Grande, April-June. 



Rhynchocyclus cinereiceps (Scl.). Eighteen specimens, adults of both 

 sexes and one young male, Boruca, Paso Real and Pozo del Rio Grande, 

 April-July. 



Todirostrum cinereum finitimum Bangs. Two specimens, male and 

 female, Pozo del Rio Grande, August. 



Todirostrum schistaceiceps Scl. Thirty-two specimens, adults and 

 young of both sexes, Boruca, Paso Real and Pozo del Rio Grande, April- 

 August. 



Oncostoma cinereigulare (Scl.). Thirteen specimens, both sexes, 

 Boruca and Pozo del Rio Grande, April-August. 



Pipromorpha assimilis dyscola (Bangs). Seventy-one specimens, adults 

 and young of both sexes, Boruca, Paso Real, Pozo del Rio Grande, and 

 Barranca, April-August. 



Leptopogon pileatus faustus subsp. nov. 



Five adults, both sexes, Boruca and Paso Real, May and July. 

 Type, from Boruca, Costa Rica, adult d\ No. 17828, coll. of E. A. & 

 O. Bangs. Collected May 5, 1906, by C. F. Underwood. 



