74 MR. F. F. LAIDLAAY ON THE [Feb. 4, 



running from the second and third femora to between the wings. 

 The whole ventral surface is yellowish brown, and this colour 

 extends for a short distance along the humeral suture and on to 

 the sides of the metasternum. Between the wings dorsally are 

 three yellow spots, one behind the other. 



Abdomen black, very slightly dilated at its base. Yellow 

 lateral spots on segments 1, 2, 3. Base of segments 2, 3, 4 with 

 a fine transverse yellow line ; mid-dorsal carina with a scarcely 

 perceptible yellow line from segments 3 to 7. Longitudinal 

 yellow marks ventrally on segments 3, 4, 5 on either side of the 

 middle line. Anal appendages black. Transverse carinse on 

 segments 2, 3. On segment 2 there is on either side anteriorly a 

 small tuft of fine black hairs. 



Legs black. In the male the second pair of femurs have each 

 a row of 18 antero-inferior short spines directed towards the knee, 

 and increasing in size gradually from above downwards. These 

 are followed after a short gap by three long straight spines which 

 are also directed a little downwards (see text-fig. 11). The third 

 pair of femurs have each 26 antero-inferior short subequal spines 

 all directed towards the knee, save the last six, which are not 

 inclined. Then follow two longer spines inclined towards the 

 knee. 



Text-fig, 11. 



Second femur of Zygonidia malayana. 



This species difi'ers from Zygonyx iris chiefly in that the 

 discoidal triangle of the lower wing is followed by two rows of 

 cells, not by three ; and in the absence of any dorsal markings 

 on segment 7 of the abdomen, in the coloration of the thorax, 

 and length of the pterostigma. It is more closely allied to 

 Zygonidia insignis (Kirby, A. M. N. H. (7) v. p. 540), from 

 which it is chiefly distinguished by its smaller size, the fewer 

 reticulations in the postnodal spaces of the hind wings, and in 

 the details of the spines on the second and third pairs of femurs 

 of the male. In Z. insignis the second pair of femurs have 

 each a row of 18 antero-inferior spines, followed by three much 

 longer spines. The first 12 are directed towards the knee, the next 

 six are not inclined, the three long spines are slightly inclined 

 towards the knee. The third pair of femurs have each some 24 

 short spines, the first 14 inclined towards the knee, the last 10 

 scarcely inclined, followed by two longer spines inclined to the 

 knee. 



I caught two specimens of Zygonidia mailayana at Kwala 

 Aring in September. These, like all the other recorded specimens 



