Microserica pusilla is a species of beetle of the family Scarabaeidae. It is found in Indonesia (Java, Sumatra), Malaysia and Thailand.
Adults reach a length of about 4âÂÂ5 mm. They are dull, without opalescent luster, but silky-glossy and with faint tomentum. The underside is dark brownish-green silky-glossy. Above with a green head, green pronotum with a yellow base, and yellow, more or less broadly finely edged elytra, on which sometimes the yellow, sometimes the dark colour predominates.
The type locality given by Thunberg in 1818 (Cape of Good Hope) was later determined to be erroneous. The confusion between Cape and Java is not very unlikely, since these two ports on the East India route are the two main places where Thunberg collected on his trip abroad, staying in Cape for three years 1772âÂÂ1775 and in Batavia for one month in 1775.