JAPANESE DRAGONFLIES ÖF THE FAMILY CALOPTEKYGIDAE. 
153 
Nom. Jap. Piukiu-hctguro-tombo. 
Loc. Loo-Choo. ( 
As has previously menthoned by Selys 15 , the form from Loo-Choo shows 
quite a different appearance compared with the typical form. It differs 
from the latter by its smaller size, and also by its thorax never having 
yellow parts but beeing greenish black and having no streaks on the lateral 
sutures. 
Not a single specimen assuming the typical feature of basilaris has been 
collected from Loo-Choo. 
Genus Psolodesmus Mclachlan. 
6. Psolodesmus mandarinus Mclanchlan. 
Psolodesmus mandarinus Mclanchlan, Trans. Ent. Soe. Loud. II. p. 
167 (1870). 
Nom. Jap. Sh iroobi-ka wa-tombo. 
Loc. Formosa. 
The type specimen was first collected in Amoy, and afterwards Hagen 
showed that the same species occurs also in Formosa. There are three 
specimens in the collection of the entomological laboratory of the college, 
but unfortunately it is quite unknown to whom their collection is due. 
7. Psolodesmus dorothea Williamson. 
Psolodesmus drothea Williamson, Ent. New. XV. pp. 247-250 (1904). 
Nom. Jap. Kinuba-kawa-tombo. 
Loc. Formosa (Loomis, Matsumura). 
7a. Psolodesmus dorothea kuroiwae Matsumura. subsp. nov. 
Length of the abdomen o' 44mm. ^ 42mm. 
Length of the hind wing 37-40mm. ^ 32mm. 
Length of the pterostigma ^ 2.5mm. ^ 1.5mm. 
1) Odon. Loo-Choo, p. 5. 
