Oguma, The Japanese Dragonüy-Fauna of the Family LibeUulidae. 105 



The most conspicuous point, by which the present subspecies 

 is distinguished from the other, is the splendid color of the wing 

 base especially that in the female specimens , and the next is 

 the yellow marking on the third segment of abdomen. 



So mato chlor a clav ata sp. nov. 



Abdomen 37 — 39 mm; bind wing 40 — 41 mm; pterostigma 

 2,5 — 3 mm. 



Closely allied to ä viridiaenea, but is distinguished as follows : 



Male. I. The last epimeron with an elongated yellow marking. 



IL Hind wing very broad at the base ; at the middle part 

 of the wing it measures 11 mm while at the part of anal angle 

 the breadth shows 13 mm. Anal loop much well developed and 

 the part near it is suffused by pale yellow. 



III. Legs black, only coxa, trochanter of the first pair yellow. 



IV. Abdomen destitute of any patterns except the first 

 4 Segments ; the protection of the second segment more con- 

 spicuous, with no yellow part, and directing the tip downwards ; 

 the posterior half of the third segment very narrow , while the 

 Segments 6 — 8 become considerably stout , so as to form a 

 clavate shape. 



V. Upper anal appendages rather short , stout , the basal 

 spine shorter than that of viridiaenea ; lower appendages two thirds 

 the length of the upper. 



F e m a 1 e : unknown. 



Nom. : Jap. Hiroba-yezo-tombo. 

 Loc. : Hokkaido. 

 Examined two male specimens collected in Sapporo by the 

 author. 



The List of the Japanese Ziibellulidae. 



Family LibeUulidae. 



Subfamily Lih ellulinae. 



1. Tholymis tillarga Fabricius. Ent. Syst. Suppl. p. 285 (1798). 



Nom. Jap. : Ameiro-tombo. 



Dist. : Forraosa (Taihanroku , Tainan) ; Kamerun , Tibet, 

 Borneo, Celebes, Philippines, Queensland etc. 



2. Zyxomma petiolatum Rambur. Ins. Nevr. p. 30 (1842). 



Nom. Jap. : Haraboso-tombo. 



Dist. : Loo-Choo (P r y e r) ; Jva, Borneo, Cape York. 



3. Zyxomma ohtusum Selys. Mitt. Mus. Dresd. p. 293 (1878). 



Nom. Jap. : Kofuki-haraboso-tombo. 



Dist.: Loo-Choo (Okinawa , üchida); Celebes, Lomboc, 

 Sumatra. 



