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Show 86 MR. F. F. LAIDLAW ON T H E [Feb. 4, the interalar space black; under surface and legs sooty black with long hairs. Wings hyaline. Legs brownish black, with very long hairs. Abdomen (first 7 segments only) dull brownish black. There can be, I think, no doubt that this species has as its nearest known ally Archineura. I believe, however, the differences between them are of generic rank, the chief of these being the much smaller number of accessory nervures running to the hinder margin of the wings, the mode of origin of the principal and sub-nodal sectors, and the character of the nerve running to the lower basal cell. The only specimen taken has unfortunately been rather badly knocked about and has lost the last segments of the abdomen. It was caught in September in jungle at Kwala Aring. Its habits were similar to those of Vestalis amoena, for which at first I mistook it. Foerster, in discussing the affinities of the genus Matronoides, has proposed the following arrangement of the genera belonging to the legion Calopteryx (Foerster, Ann. Soc. Ent. Belg. p. 66, 1899):- rSjflphis. f IS o pterostigma < „, J J 1 ) Phann. {^Vestalis. fUmma. Pterostigma present ...jjjgj?; \^Psolodesmus. fMatrona. HNo pterostigma Neurobasis. < Matronoides. Basilar space with cross! [^Neia-obasis. vules. (Eh L A pterostigma present.) ^c ,'. C Archineura. Basilar space free. uervi If this grouping be accepted, and it is very convenient, the last division may now stand as follows:- f Short rhomboidal pterostigma...Echo. Pterostigma present.-; m , • , -,_ , ., , . ,. ° * | Pterostigma at least three C Archineura. [__ times as long as broad. £ Climacobasis. NEUROBASIS CHINENSIS (Linn.). Neurobasis chine?isis, Kirby, Cat. Odonata, p. 102; Selys Odon. de Sumatra, Ann. Mus. Genova (2) vii. p. 189 ; Selys, Odon. de Birmanie, loc cit. (2) x. 1890-1, p. 487; Selys, Neurobasis chinensis et ses races locales, Ann. Soc. Ent. Belg. 1896; Karsch Ent. Nachr. xvii. no. 16, p. 243. Five males, three females, from the Aring River in Kelantan. This species appears to travel further down the rivers than any other Calopterygine, at least so far as m y observations went. It is very widely spread in Tropical Asia, |