MTEMECIZA.— HTPOCNEMIS. ' 231 



of which we have, through Mr. Ridgway's kindness, had an opportunity of comparing. 

 It also differs in many respects from M. exsul, which also has white-tipped wing- 

 coverts. Its throat is much darker and the abdomen deeper chestnut, besides other 

 differences. Until recently the type of this species was the only known specimen, 

 but now, Mr. Cherrie tells us^, there is an example in the National Museum of 

 Costa Rica. 



HYPOCNEMIS. 



Hypocnemis, Cabanis, in Wiegm. Arch. f. Naturg. 1847, xiii. p. 312; Scl. Cat. Birds Brit. Mus. 

 XV. p. 284. 



Seventeen species of this genus are recognized by Mr. Sclater in his catalogue, and 

 the names of two others are mentioned. These belong almost exclusively to the valley 

 of the Amazons and Guiana, only one species, H. ncevioides, and this a bird of the 

 southern continent, entering our fauna as far as Costa Rica. 



Compared with Myrmeciza, Hypocnemis does not present much difference, but both 

 genera contain a number of species belonging to distinct groups. H. ncevioides has a 

 much shorter squarer tail than M. swainsoni, the type of Myrmeciza, the bill is stouter 

 and wider at the base, the nostrils being similarly formed; the development of the 

 frontal and supranasal feathers and of the vibrissse is the same in both forms, and both 

 have a small postocular bare space. The tarsi, as in most of these terrestrial forms, 

 have the planta entire. 



1. Hypocnemis naevioides. 



Conopophaga navioides, Lafr. Rev. Zool. 1847, p. 69 *. 



Hypocnemis ncevioides, Cassin, Proc. Ac. Phil. 1860, p. 190^; Lawr. Ann. Lye. N. Y. vii. p. 326°; 



ix. p. 109'; Scl. & Salv. P. Z. S. 1864, p. 357'; Tacz. & Berl. 1883, p. 566'; Zeledon, An'. 



Mus. Nac. Costa Rica, 1887, p. 113'; Scl. Cat. Birds Brit. Mus. xv. p. 293'. 



Supra castanea, plaga dorsali celata alba, capite saturate cinereo ; aKs nigris, tectricibus minoribus albo termi- 

 natis, tectricibus reliquis et secundariis interioribus maculis magnis rufls notatis, bis quoque in pogonio 

 externo eodem colore irregulariter limbatis : subtus alba, mento et gula nigris plumis ad basin albis, 

 pectore et abdominis antici lateribus maculis magnis nigris notatis, hypoehondriis cinerascentibus ; cauda 

 rufescenti-brunnea, fascia subapicali nigra et rufo terminata : rosfcro nigro, pedibus corylinis. Long, tota 

 4"5, alee 2-5, caudae 1'4, rostri a rictu 0-85, tarsi 0-9. (Descr. maris ex Panama. Mus. nostr.) 



2 mari similis, supra brunnescens dorse castaneo tincto : subtus alba, maculis pectoralibus fuscescentibns. 

 (Descr. feminse ex Tucurriqui, Costa Eica. Mus. nostr.) 



Hob. Costa Rica, Angostura, Turrialba {Carmiol *), Tucurriqui {Arce), Jimenez, Pacuare 

 (Zeledon^); Panama, Lion Hill (M'Leannan^^), Paraiso Station {Hughes), Chepo 

 (Arce), R. Truando ( Wood ^). — Western Ecuadok ^. 



The chestnut back and conspicuous large round black spots on the breast of this 



