THE SUBFAMILY LIBELLULIN2E. 317 



wing below adjacent as far as the base of the triangle is filled up by a brown band, 

 which is sometimes continued within the first subbasal sector for a short distance, and 

 then curves round more broadly towards the inner margin, which it does not reach ; 

 but it is more frequently detached from the broad brown band which runs from the 

 base of the sector of the triangle nearly to the inner margin. Meshes of the hind 

 wings rather large. 



The sexes differ little. The anal appendages in the female are shorter than in the male. 



Hob. N. India (common), Ceylon. 



Nearly allied to the African T. lasilaris, Beauv., in which, however (judging from 

 the single broken specimen before me), the yellow area on the hind wings is much less 

 extended, and the opaque spaces (of which the upper one is much more extended) are 

 nearly black. It has very little resemblance to T. chinensis, De Geer, with which 

 Burmeister confounded it. 



Tkamea madagascariensis. 



Long. corp. 50 millim. ; exp. al. 96 millim. ; long. pter. 3^ millim. 



Male— Reddish brown, villous, vertex below the ocellus violet, this colour extending, 

 though paler, to the front of the frontal tubercle, tips of mandibles blackish. Thorax 

 with somewhat indistinct blackish markings on the pleura. Abdomen sometimes with 

 obsolete black lines on the sides of the second and third segments, and obsolete black 

 dots on each side towards the extremities of the following segments above ; the last 

 three segments black in the middle above, but more narrowly than usual. Legs black, 

 front femora reddish beneath to the middle ; appendages of the second segment very 

 conspicuous, the lateral appendages slender and slightly hooked backwards; anal 

 appendages fully as long as the last three segments, slender, black, with a red basal 

 spot, curved downwards and approximating at the base, then parallel, and again sepa- 

 rating a little, and acuminate at the extremity. Wings hyaline, most of the nervures 

 on the costa to beyond the nodus, and at the base up to or beyond the triangles, 

 reddish, the rest black, 12-13 antencdal and 9-10 postnodal nervures ; triangles rather 

 long, followed by four rows of cells (five cells first on the left wing), and with two cross 

 nervures (sometimes one); pterostigma yellow, between two black nervures; hind 

 wings with the membranule white, the opaque space (except a slight clouding on the 

 nervures above) commencing with the lower basal cell, only touching the first subbasal 

 sector at its base, and then dropping downwards almost perpendicularly, though slightly 

 indented on each cell, and then curving off gradually towards the anal angle, which it 

 does not quite reach ; this opaque space is of the usual reddish-brown colour, with 

 reddish nervures, and is almost entirely uniform, only the edges being rather paler here 

 and there; there is no vitreous space on the inner margin, and there are no pale 

 centres to any of the cells. 

 Hab. Betsileo, Madagascar. 



