Odonata from Ceylon. 273 



directed towards the knee, and becoming rather longer towards 

 the extremity of the femora, where thej are followed by 

 three or four lo!ig seta^. The front carina of tlie front 

 femora and tiie hind carina of the hind femora are also armed 

 with extremely fine teeth. 



The genus Pseudomacromia must therefore be placed in the 

 immediate neighbourhood of Zygonidia, though the claws are 

 not bifid, but dentated *. 



I add here a list of the described species of Zygonidla^ with 

 descriptions of new species from Ceylon and Tonkin. 



Genus Zygonidia, Kirb. 



Zygonidia, Kirb. Ann. & Mag. Nat. Hist. (7) v. pp. 532, 540 (Juue 

 1900). 



1. Zygonidia insignis, Kirb. 

 Zygonidia itisignis, Kirb. /. c. pp. 533, 540, pi. xii. tig. 1 (June 1900). 

 J /ah. Hainan. 



2. Zygonidia malayana, Laidlaw. 



Zygonidia mahiyana, Laidlaw, Proc. Zool. Soc. Lond. 1902, i. pp. 73-75, 

 tig. 11 (femur). 



Hah. Kwala Aring, Malay Peninsula. 



3. Zygonidia ceyhnica, Kirb., sp. n. 



(^ . — Long. Corp. 57 mm.; exp. al. anf. 102 mm., lat. 

 "9 mm., long. pter. 2^ mm.; laf. al. post. 14 ram., long, 

 pter. 3 mm. 



? . — long. Corp. 55 ram. ; exp. al. ant. 105 mm., lat. 

 11 mm., long. pter. 3 mm.; lat. al. post. 16 ram., long. 

 pter. 3 mm. 



Male. — Head : upper part rich parple_, sides of frons and 

 genffi yellow ; the rest of the face dull bluish black, except 

 the mentum, which is shining black, bordeio 1 on the sides 

 and front with yellow. Occiput black. Thorax and abdo- 

 men black above, with three yellowish spots on the median 

 line between the wings ; a strong carina, narrowly lined 

 with yellowish, on segments 2-8 of the abdomen. Pleura 

 greenish blue, with broad yellow sutures ; first two abdo- 

 minal segments with a small yellow spot on each side. Legs 

 blackish j femora with numerous short spines directed towards 



* Cf. Sjiistedt, Bihang Sveuska Akad. xxv. (4: 2) pp. 23 20 (1000). 



