In January 1911 Mr. E. Jacobson spent some weeks at Nongkodjadjar on Mount Tengger, East Java, at an elevation of about 1200 m. above sea-level. Here he brought together a small collection of birdskins, 24 specimens belonging to 18 species, which he kindly presented to our Museum. The collection contains one form, a Crocopsis, that seems to be an undescribed subspecies. In the following lines an enumeration of the species is to be found; where necessary, I have referred to my list of the birds, collected by Mr. Jacobson is West Java, published in this periodical, vol. XXXII, 1910, pp. 105—166.