MYRMECIZA.—HYPOCNEMIS. 231 
of which we have, through Mr. Ridgway’s kindness, had an opportunity of comparing. 
It also differs in many respects from D/. 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. 212; 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. nevioides, 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. HH. nevioides has a 
much shorter squarer tail than MW. swainson?, 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 vibrissee 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 neevioides. 
Conopophaga nevioides, Lafr. Rev. Zool. 1847, p. 69*. 
Hypocnemis nevioides, Cassin, Proc. Ac. Phil. 1860, p. 190°; Lawr. Ann. Lye. N.Y. vii. p. 326°; 
ix. p. 109"; Scl. & Salv. P. Z. 8. 1864, p. 357°; Tacz. & Berl. 1888, p. 566°; Zeledon, An. 
Mus. Nac. Costa Rica, 1887, p. 1137; Scl. Cat. Birds Brit. Mus. xv. p. 293°. 
Supra castanea, plaga dorsali celata alba, capite saturate cinereo; alis nigris, tectricibus minoribus albo termi- 
natis, tectricibus reliquis et secundariis interioribus maculis magnis rufis notatis, his 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, hypochondriis cinerascentibus ; cauda 
rufescenti-brunnea, fascia subapicali nigra et rufo terminata: rostro nigro, pedibus corylinis. Long. tota 
4:5, alee 2°5, caudex 1:4, rostri a rictu 0°85, tarsi 0-9. (Descr. maris ex Panama. Mus. nostr.) 
@ mari similis, supra brunnescens dorso castaneo tincto: subtus alba, maculis pectoralibus fuscescentibus. 
(Descr. femine ex Tucurriqui, Costa Rica. Mus. nostr.) 
Hab. Costa Rica, Angostura, Turrialba (Carmiol *), Tucurriqui (Arcé), Jimenez, Pacuare 
(Zeledon"); Panama, Lion Hill (M*Leannan*°), Paraiso Station (Hughes), Chepo 
(Arcé), R. Truando (Wood ?).—Western Ecuapor °. 
The chestnut back and conspicuous large round black spots on the breast of this 
