ONCOSTOMA.—LOPHOTRICCUS. 15 
A species of the hotter parts of the State of Vera Cruz according to Sumichrast °, but 
found near Cordova by Sallé1. The former naturalist also met with it in several places 
on the Isthmus of Tehuantepec 8, thence it spreads over the forest lands of Guatemala 
bordering the Pacific Ocean, ascending the mountains to an elevation of 3000 or 4000 
feet. On the Ailantic side of the cordillera it occurs in the forest-region of northern 
Vera Paz and in the valley of the Polochic river, and is also not at all uncommon in 
the neighbourhood of Coban in January at an elevation of about 4500 feet above the 
sea-level. | 
The southern extension of this species is rather remarkable, as it does not terminate, 
like that of so many species where a second is found in the southern section of our 
fauna, in Honduras and Nicaragua, but it reaches Chiriqui, the allied form occurring 
on the line of the Panama Railway. 
Its habits much resemble those of the various species of Todirostrum. The iris in 
life is greyish white. 
2. Oncostoma olivaceum. 
Todirostrum olivaceum, Lawr. Ibis, 1862, p. 12°. 
Oncostoma olivaceum, Scl. Ibis, 1862, p. 12 (note)*; Cat. Birds Brit. Mus. xiv. p. 77°; Lawr. Ann. 
Lye. N. Y. vii. p. 4734; Scl. & Salv. P. Z. 8S. 1864, p. 358°. 
Precedenti similis, sed capite summo olivaceo dorso concolore; gula quoque et abdomine concoloribus pallide 
flavo-olivaceis, tectricibus alarum magis distincte flavido limbatis, distinguendum. (Descr. maris ex Lion 
Hill, Panama. Mus. nostr.) 
Hab. Payama, Lion Hill (1f‘\Leannan | 2? 4°). 
Oncostoma olivaceum is a close ally of O. cinereigulare, but at the same time easily 
recognized. So far as we know the only specimens that have been obtained were 
secured by M‘Leannan during the time he was station-master at Lion Hill on the 
Panama Railway. 
LOPHOTRICCUS. 
Lophotriccus, H. v. Berlepsch, P. Z. 8. 1883, p. 553 (type Todirostrum spicifer, Lafr.); Scl. Cat. 
Birds Brit. Mus. xiv. p. 86. 
The two species which now constitute this genus were included in Huscarthmus until 
Count Berlepsch separated them in 1883, but without giving any characters. L. spicifer 
is a species of the upper Amazons valley up to the base of the Andes. JL. sqguamicris- 
tatus has a wider and more northern and western range over Venezuela, Colombia, and 
Ecuador, entering our region as far as Costa Rica. 
Compared with Yodirostrum this genus has a much less elongated flattened bill, the 
sides of which converge from the gape to the tip, the membrane over the nostrils is 
more developed, the tarsi are covered with a single shield, the tail is less rounded, and 
the feathers of the head are wide and produced into a conspicuous crest. 
