1864.| MR. 0. SALVIN ON NEW BIRDS FROM COSTA RICA. 581 
nigris: alisnigris, harum autem (nisi quinque extimarum) basi- 
bus extus, partim tectricibus celatis, cum marginibus ipsarum et 
secundariorum apicem versus schistaceis, in pogonio interno 
omnium parte basali alba, sieut in M. unicolore: tectricibus 
minoribus et majoribus schistaceo marginatis: cauda nigra, 
remigum duorum externorum parte apicali cinerea gradata, 
apicibus ipsis albis: rostro aurantiaco, pedibus flavis. 
Long. tota 6°3, alze 3°4, caude 3, tarsi *75, rostri a rictu °65. 
Hfab. Costa Rica (Tucurrique). 
Affinis M. unicolort, sed fronte et mento nigris, rostro aurantiaco, 
ete., primo visu distinguendus. 
This is a very marked and typical species of this interesting genus, 
the range of which is confined to the approximate parts of the two 
continents, the long isthmus connecting them, and some of the An- 
tilles. It has no very near affines, being quite distinct from M. 
unicolor, Scl. (P. Z.S. 1856, p. 299), its closest ally. 
5. LANIO LEUCOTHORAX, Sp. n. 
L. flavissimus, capite toto cum mento et alis caudaque nigris : gula 
tota albida vix ochraceo tincta: tectricibus subalaribus et ala- 
rum minoribus albis : rostro nigro, pedibus nigris. 
Q supra ochracescenti-brunnea, uropygio paulo dilutiore : capite 
toto cum gula brunnescentioribus: abdomine flavo-ochraceo, 
erisso et lateribus brunnescentioribus: rostro nigro, pedibus 
Suscis. 
Long. tota 7°8, ale 4:2, caudz 3°8, tarsi ‘75, rostri a rictu °9. 
Hab. Costa Rica (Tucurrique). 
Affinis L. aurantio, Lafr. (R. Z. 1846, p. 204), sed gula albida, non 
nigra, facile distinguendus ; foemina etiam brunnescentiore. 
This makes the fourth species of the genus Lanio at present known, 
viz., L. aurantius, Lafr., of Central America, having a black throat ; 
L. leucothorax, of Costa Rica, with the throat white; ZL. versicolor, 
D’Orbigny (Voy. p. 262, pl. 19. f. 1), of Bolivia, having the whole of 
the wing-coverts white; and L. atricapillus, Gm. (S. N. p. 898), of 
New Granada and Cayenne, in which the yellow parts are much more 
ferruginous. 
6. CHLOROSPINGUS PILEATUS, Sp. nl. 
C. olivaceus : eapite et nucha nigris, hujus et pilei postici lateribus 
cum stria postoculari concurrentibus albis ; superciliis tpsis et 
loris nigris : gula, macula longa rictali et abdomine albis : pec- 
tore et corporis lateribus olivaceis, illo flavescentiore : alis et 
cauda fuscis, olivaceo marginatis : campterio flavo, tectricibus 
subalaribus albidis : rostro obscure plumbeo, pedibus fuscis. 
Long. tota 5:4, ale 2°75, caudze 2°6, tarsi 1, rostri a rictu °6. 
Hab. Costa Rica (Volean de Cartago). 
Vix alicui sui generis similis. A C. flavipectore Lafr. capite nigro 
et striis albis capitis utrinque, a C. superciliari Lafr. rostro ro- 
bustiore et corporis colore subtus differt. 
