274 [December, 



lated, surmounting 4—5 cellules. 13—14 antenodal and 24—26 postnodal nervules 

 in the anterior wings, 2 — 4 nervules in the quadrilateral. 



? (adult). Markings of the head and thorax as in the $ , but the two- anterior 

 yellow points on the top of the head are very much larger (forming rounded spots), 

 and inside each is a linear yellow spot ; the posterior prothoracic lobe more pro- 

 nounced. On the mesothoi'ax the dorsal crest is finely yellow. 



Abdomen shorter and stouter, obscure brown rather than red, the sides of the 

 second segment yellowish ; the sutures more broadly black than in the S , and there 

 are vague indications of subdorsal blackish bands ; 8th to 10th segments blackish, 

 marked with brownish. Appendages longer than the 10th segment, black, linear, 

 straight, pointed : ventral valves slightly exceeding the 10th segment, acute, with 

 short black filiform appendages. 



Wings proportionately broader than in the $ , hyaline, uniformly tinged with 

 brownish fuliginous ; 11 antenodal, 21 postnodal, nervules in the anterior wings ; 2 

 interquadi'ilateral nervules in the anterior and 3 — 4 in the posterior (these are no 

 doubt liable to numerical variation). 



Lengh of posterior wing, <? $ , 27 mm. Expanse, J $ , 55 mm. Length of 

 abdomen, S > 20 mm. ; $ , 18 mm. 



Sab. : Lombock (Sapit, 2000 £t., Fruhstorfer, April, 1896, 5 (J, 



There is mucli in common between i. lomhocJcensis and the de- 

 scription of Bhinocyplia Braueri, Kriiger, from Sumba (Stett. ent. 

 Zeit., 1898, p. 133), but the latter is smaller, and appears to differ 

 sufficiently in the colour of the legs, abdomen, &c., &c. The Lombock 

 insect appears to me to be better placed in Libellago than in Ithino- 

 cypha. 



The only other described non-African species of Libellago is L. 

 asiatica, Selys, from the Philippines, introduced in 1879. L. lomboch- 

 ensis is abundantly distinct therefrom according to the description. 



In comparing the Lombock species with those from Africa, in order 

 to see if there be any radical structural difference, I note that in the 

 neuration of it the only sector that is angulate (" fracture ") for nearly 

 its whole length is the " second of the triangle," whereas in the African 

 forms several of the supplementary sectors are also distinctly angulate. 

 I know not if this difference exist in L. asiatica. It is present in 

 several species of the " tincta " group of Bhinocypha, which generic 

 term should probably be retained only for the species in which there 

 are fenestrate markings in the wings, such as fulgidipennis and its 

 allies, the indication of tincta as the type by Kirby, in his Catalogue 

 of Odonata appearing to be unwarranted, and contrary to the intention 

 of Kambur when he founded the genus. 



Lewisham, London : 



August 28tk, 1898. 



