Gall Generations of the Soldier-producing Aphid Pseudoregma bambucicola (Homoptera)

Galls of Astegopteryx swinhoei were rediscovered from Styrax suberifolia in Taiwan. It is proposed that A. swinhoei TAKAHASHI, 1936, is conspecific with Pseudoregma bambucicola (TAKAHASHI, 1921), which is known to produce 1st-instar soldiers on bamboo. It was found that this species produces 2nd-instar soldiers in the gall. Galls and 1st-instar exules deposited by emigrants are described. The life cycle in Taiwan is briefly reviewed, and that in southern Japan is discussed in relation to the production of soldiers and sexuparae.