Chestnut Aphid

I found the stump of a chestnut tree (kuri) and all of its few remaining branches were covered by a huge colony (huge colonies?) of chestnut aphids (kuri-oo-aburamushi).

It was interesting to see the variety of forms all mixed up in the colony: small red eggs, nymphs, large black viviparous females, and both male and female winged forms.

In the next photo, you can see the defense strategy these aphids use – they all raise their hind legs in the air and shake them vigorously. It surprised me, so I guess it might scare away a bird!

Hemiptera: Homoptera: Aphidae
Lachnus tropicalis

Great Chestnut Aphid = kuri-oo-aburamushi

Location: Edge of mikan orange orchard near Munakata Common (map).

Biting Assassin Bug

Shinobu was woken up at 3 a.m. by a burning bite on the forehead from an assassin bug (kuro-satsu-game). She slapped it away and then managed to squish it in a tissue (remarkably without damaging it too much – thankyou Shinobu!).

Although the bite is painful, this species is not dangerous and assassin bugs are not thought to be disease vectors in Japan. However, Chagas Disease in C. & S. America is carried by other types of Reduviids, in the sub-family Triatominae, commonly known as “Kissing bugs.” Chagas Disease kills 40,000 people a year!

Peirates cinctiventrisPeirates cinctiventrisPeirates cinctiventris

Hemiptera: Reduviidae (assassin bugs)
Black Assassin Bug = kuro-satsu-game
Peirates cinctiventris

Factsheet about Assassin Bugs from Queensland, Australia:

Yellow-Spotted Stink Bug

Lots of these yellow-spotted stink bugs (kimadara-kamemushi) on the trees in the park next to my children’s school. Although it is not native to Japan, it is very common in Fukuoka. It is listed on Australia’s Pests and Diseases Image Library (PaDIL and according to the PaDIL factsheet (here), this species, “is a major pest of pine trees and hardwood trees in Taiwan… [and] also a pest of pears in China.”

Erthesina fulloErthesina fulloErthesina fulloErthesina fullo

Hemiptera: Pentatomidae
Erthesina fullo (Thunberg)

Yellow-spotted stink bug = kimadara-kamemushi

Location: Park near Katounishi Elementary School (map)

Brown Marmorated Stink Bug

These stink bugs live up to their name. If you accidently squash one… well, they stink! They sometimes come into the house which is a bit of a nuisance. This species is also a pest of fruit trees (such as peach and plum).
According to the University of Florida Department of Entomology and Nematology (link here), the brown marmorated stink bug (kusagi-kamemushi) “is a recently introduced pest to the western hemisphere and … may become a major agricultural pest in North America.”

Halyomorpha halys

Hemiptera: Pentatomidae
Halyomorpha halys
or Halyomorpha picus?

brown marmorated stink bug = kusagi-kamemushi

Location: path near Hyoutan Pond (map)