Abstract
The genus Homalogonia is represented in Japan by H. obtusa (WALKER) and a species of which species name has not yet been made clear. H. obtusa (WALKER) is widely distributed in the whole land of Japan, and frequently harms pulses and leguminous pastures. It has one generation a year. The eggs are mostly laid in May and June. The new adults generally appear in August and September. The developmental period is about 60∼75 days in Morioka. The egg and the each instar larva of the present sepcies are discernible from those of the related genus Halyomorpha and the other genera by the following features : the egg elliptical, somewhat broad upperly, furnished with a lamellate reticulation and minute, granulous micropylar projections on chorin; larvae with stigmata on the 2nd to the 8th abdominal segments, scattered with asymmetric, large, black dots on abdomen in the 1st instar, with antenniferous tubercles which are well developed abd visible from the dorsal side in the 2nd to the 5th instars. The genus Halyomorpha is represented in Japan by only one species H. mista (UHLER) which widely inhabits the whole land of Japan, and severely injures various fruit trees, vegetables, pulses, leguminous pastures etc. The developmental stages have already been reported by the author (1956).
