_Mycetes villosus_, Gray, Ann. Nat. Hist., xvi., p. 220 (1845); id. Cat. Monkeys Brit. Mus., p. 41 (1870); Sclater, P. Z. S., 1872, p. 5, figs, 1 and 2; Alston, in Godm. and Salvin, Biol. Centr. Amer. Mamm., pp. 3 and 5, pl. i. CHARACTERS.--Differs from _M. niger_ by its abundant, long, and soft hairs, which below, towards their bases, show a rufescent tinge, and by the frontal hairs being _sometimes_ directed downwards at the base, instead of upwards; hair on cheeks under the ears, brownish. MALE.--Entirely black. FEMALE AND YOUNG.--Also quite black, like the adult male, {200}instead of being pale yellow, like the corresponding age and sex of _A. nigra_, and having also the hair shorter and not so glossy. DISTRIBUTION.--This Howler is known only from the virgin forests of the eastern and north-eastern portions of Guatemala. Mr. Osbert Salvin has given the following account of this species. "The _Mycetes_ of Guatemala is commonly known as the 'Mono.' It is abundant throughout the virgin forests of the eastern portion of the Republic, but is unknown on the forest-clad slopes which stretch towards the Pacific Ocean. In the former region it is found at various altitudes over a wide expanse of country. I have heard its cry on the shores of the lake of Yzabal; and all through the denser forests of the valley of the River Polochic it is very common, from the steep mountain road which lies between the upland village of Purulá and S. Miguel-Tucuru, and especially in the wilderness of uninhabited forest, which stretches from Teleman to the lake of Yzabal. In the unbroken forest-country which occupies the whole of the northern portion of Vera Paz, from Coban and Cahabon to the confines of Peten, it is also abundant; for seldom an hour passes but the discordant cry of the Mono strikes upon the ear of the traveller, as he threads the lonely path to Peten. The elevation of this district varies from 700 to 3,000 feet, and the _Mycetes_ is found at all elevations. When travelling through the forest in 1862, I was dependent for the animal food, to supply my party of Indians, entirely upon my gun, and Monos contributed not a little to the larder. The Indians eat Monkey without demur, but the meat looks dark and untempting. For my own part I far preferred the delicate Tinamou or Curassow, a sufficient supply of which never failed for my own consumption. Perhaps there is no district in Vera Paz where Monos are more abundant than the mountains of {201}Chilasco, a cold and damp region, elevated at least 6,000 feet above the sea, but where the forest-growth is of the densest description and trees of the largest size abound. It was here that the specimens were obtained that are now in the British Museum."