Malayoglyphus intermedius n.g., n.sp., a new mite from house dust in Singapore and Djakarta (Pyroglyphidae: Sarcoptiformes).

The new species which is described here has been found in the course of inves­ tigations on the house-dust fauna in Singapore (Republic of Singapore) and in Djakarta (Indonesia). These investigations had been conducted in relation with the problem of house-dust asthma in these regions. Curiously enough, this new species had been discovered nearly at the same time by two different investigators working in two widely separated localities. A single female specimen was recognized among a series of mites that had been isolated from the dust of a house in Singapore, in February 1968. This sample of dust contained also numerous mites belonging to a species that, so far, was known only from Brasil (Sturnophagoides brasiliensis) and a few specimens of the ubiquitous Dermatophagoides pteronyssinus. AH the other specimens of this new species had been coHected in two houses in Indonesia during April 1968. Most of these were found in a house of Djatinegara, near Djakarta. They were mixed with several other species of mites among which Dermatophagoides pteronyssinus (29 specimens), Dermatophagoides farinae (5 specimens), Glycyphagus sp. (30 specimens) and sorne cheyletids (10 specimens). Four other specimens were obtained from a house in Djakarta, together with D. pteronyssinus (ISO specimens), D. farinae (30 specimens) and D. chelidonis (5 specimens).