OCR Text |
Show 76 MR. F. F. LAIDLAW ON THE [Feb. 4, the dorsal spots. Segments 9 and 10 black, segment 10 is very small. Upper appendages black, curved slightly inwards and at first downwards, but at their distal ends they turn up a little. About halfway along their ventral sides is a small tooth. Yentral appendage black, rather broad and flat, bifid at its extremity, not more than two-thirds the length of the upper pair. Legs black. On each of the first pair of femurs is a single spine immediately before the knee. In the second pair on each are three long pairs of spines inclined towards the knee and distant from each other. On each of the third pair of femurs are 4 pairs of large spines, rapidly increasing distally, followed after a gap by a single pair. All inclined slightly towards the knee. On the first pair of tibias are three pairs of long equidistant spines, on the second and third pair of tibias are four pairs of large spines. (See text-fig. 12.) Text-fig. 12. Third leg of Onychothemis testacea (X 1§). A single male from Kwala Aring. This species differs from Onychothemis abnormalis (Brauer, Verh. Ges. Wien, xviii. p. 170) in having no transverse carina on the fourth abdominal segment, and in having the claws of the third pairs of legs without any sign of a tooth. I have not been able to examine a specimen of 0. abnormalis, a Philippine Is. species, but the present species is evidently closely allied to it. This genus appears to stand quite remote from other Libel-lulids, not only in the absence of a tooth on the basal claws, but in the remarkable armature of the femurs. The two species of the genus should form an independent subsection of the Libellulinm. C O R D U L I I N . E. Two members of the subfamily are known to occur in the Peninsula; these are Macromia weshvoodi, Selys, and Idionyx yolanda, Selys. To these can now be added Macromia gerstaeckeri, recently described by Kriiger from Java (Krlig., Stett. ent. Zeit. 1899, p. 335), and Idionyx dohrni (loc cit. p. 326) from Sumatra. MACROMIA GERSTAECKERI Kriiger. Macromia gerstaeckeri, Kriiger, Stett. ent. Zeit. 1899, p. 335. I caught a pair of a species of Macromia, which I refer to this |