Notwithstanding the rich literature concerning the peoples and languages of the Philippine Archipelago, there is no book or publication in which are catalogued the names of the tribes and the languages, and this appears the more inexcusable, since both Spanish and Philippine writers, with few exceptions, handle these names very carelessly, so that great confusion must ensue. The prevailing bad form in the Philippines, of transferring the name of one people or family (Stamm) to another, who possess similarities of any kind with the first, either in manner of life, or even only in culture grade in the widest sense of the term, has its counterpart in a second bad fashion of making several peoples out of one by replacing the folk name with the tribal names. Only with the greatest pains and thought is it possible to extricate one's self from this labyrinth of nomenclature. After thorough search, I am convinced that many names reported to me must be eliminated, since they owe their existence to mistakes in penmanship or printing, to ridicule, misunderstanding, or error, as I have proved in single instances. However, I have been convinced that by a closer and intelligent exploration of the archipelago, it would not only be possible to make many corrections, particularly in orthography, but that new names would also be added, especially from northern Luzon and from the interior of other islands. I have introduced into this catalogue all the variations of published names known to me, and briefly the description of tribal locations and reports on their culture grades, especially their religion. Besides the Negritos, I differentiate only Malay peoples (Stamme) in general, because here regard for different principles of grouping and subdividing of the Malay race would appear to serve no good end and perhaps prove troublesome. Obsolete forms of names are carefully marked with a cross. Where I, as with the Talaos, Mardicas, and Cafres, take note of foreign peoples or castes on the islands, it is because Spanish authors have erroneously set them down as Philippine. On the other hand, in order to draw attention to a few names customary in the country for races and castes, I have included the following, not belonging here in strict accordance with the title of this article: Castila, Cimarrones, Indios, Infieles, Insulares, Mestizos, Montaraz, Peninsulares, Remontados, and Sangley: Abacas.--Heathen Malay people, who lived in the dense forests of Caraballo Sur (Luzon). Warlike, probably head-hunters. In the last century they were Christianized, and in their territory the parish of Caranglan (province of Nueva Ecija) was founded, where their descendants lived as peaceful Christians. They have a language of their own, but appear now to be thoroughly Tagalized. Abra-Igorots, Igorots of Abra.--Collective title for the head-hunters living in the province of Abra (Luzon). Belong for the most part to the Guinaanes.