534 Mr. W. F. Kirby on Odonata from Hainan. 



double longitudinal testaceous median line as far as the 

 seventh segment. 



Wings hyaline, with a slight yellowish tinge, and of nearly 

 equal length ; pterostigma narrow, black, covering about 

 three cells, and near the apex of the wing, which is clouded 

 with smoky yellow beyond, the arculus rising at or very near 

 the second antenodal cross- nervure. Wings nearly parallel 

 to the level of the pterostigma, but the fore wings slightly 

 expanding to the broadest point. 



Two specimens only obtained. 



5. Orthetrum tesiaceum. 



Libcllula testacea, Burm. Handb. Ent. ii. p. 859. n. fi4 (1839). 

 Orthetrwn tesfuceum, Kirb. Cat. Near. Odon. p. 39. n. 47 (1890) ; 

 Karsch, Ent. Nachr. xvii. p. 246 (1891). 



One specimen only. 



This species appears to be pre-eminently insular in its 

 tastes. There are specimens in the Natural History Museum 

 from Penang, Dindings, Formosa, Philippines, Java, Borneo, 

 and Celebes. 



6. DipJacodes (?) nebulosa. 



Libellula nebulosa, Fabr. Ent. Syst. ii. p. 879. n. 27 (1793). 

 Diplacodes 7iebitlosa, Kirb. Oat. r^eur. Odou. p. 42. n. 1 (1890) ; Karscb, 

 Berl. ent. Zeitsclir. xxxiii. p. 372 (1890). 



A pair ( (^ ? ) of this species, which, besides being Asiatic 

 and not African, differs in several minor particulars from the 

 type of the genus. 



7. Acisoma panorpoides. 



Lihellula panorpoides, Ranib. Ins. Ndvr. p. 28, pi. ii. fig. 2 b (1842). 

 Acisoma panorpoides, Kirb. Trans. Zool. Soc. Lond. xii. p. 309 (1889) ; 

 Cat. Neur. Odon. p. 43. n. 1 (1890). 



One specimen only. 



There are specimens in the Natural History Museum from 

 China, India, Ceylon, Singapore, and Lombok. 



8. jEshna Thomassom, sp. n. 



Exp. al. 74 millim. 



Male. — Head black ; a green band between the eyes on 

 the occiput and another in front of the ocelli ; a large yellow 

 spot at the base of the mandibles. Pronotum black, with 

 rvvo small green contiguous spots in the middle. Mesonotum 

 velvety black j a broad green band, connected in front, on 



