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Show 1902.] DRAGONFLIES OF T H E " SKEAT EXPEDITION." 85 lying over 4-6 cells. Behind the pterostigma are first two rows Th then'after about five cells'only one row- Abdomen dark brown, with a green iridescence in some lights on the first three and last three segments. Tenth segment very short, not half as long as the ninth, ninth longer than the eighth. Appendages shorter than the tenth, black, conical, and sharply pointed. l J This species differs from E. uniformis Selys (? = E. tricolor Uruger) in having a smaller number of postnodal cells (it possesses 45 as against 60-65), in its rather smaller size, and in the colouring of the wings, which are described by Kriiger as being m the female yellow all over, especially at the base and anterior margin, whereas in E. modesta the base of the wings is perfectly transparent (Kriiger, Stett. ent. Zeit. 1893, p. 72 ; Selys, Bull. Ac. Belg. (2) xlvii. p. 357, id. Ann. Soc. Ent. Belg.). There is a female in the British Museum from Mr. Ridley, collected in Penang, belonging to this species. It has 37*ante-nodals and 48 postnodals in the fore wings. Its abdomen is of a dull dark red-brown colour. CLIMACOBASIS, gen. nov. Basal area of wings reticulated. Pterostigma long; quadrilateral long, rectangular; arculus bent, sectors starting at the same point just below its middle. Principal and subnodal sectors rise at about the same level from the reticulum, between the upper sector of the arculus and the median nerve. The nervule closing the lower basal cell runs from the lower sector of the arculus straight down to the lower extremity of the lower basal cell. CLIMACOBASIS LUGENS, sp. n. (Plate VI. fig. 5.) (Last three segments of the abdomen missing.) Length of abdomen (segments 1-7) 42 m m . Length of hind wing 47 m m . Breadth of hind wing 10 mm. Fore wing with 37 antenodals, 45 postnodal nerves. Pterostigma covering 8-9 cells, about 2-5 mm. in length, very black. Basal area with 8 cross nerves. Hind wing. 34 antenodals, 37 postnodals. Pterostigma as in fore wing, basal area with 8 cross nerves. Head. Lower lip, base of the mandibles, and upper lip black. Between the eyes, running forward as far as the epistome, is a remarkable square milky-white patch of considerable size, taking up in fact the greater part of the vertex. Along its hinder margin it is notched in the middle by the anterior ocellus, which is surrounded by a very small black ring which is continuous with a rectangular black patch, in which lie the two posterior ocelli; the rest of the head is of a very dark bronze-green colour. Prothorax dark green, almost black. Thorax. Dark metallic green above, with all the sutures and |