BORNEAN DRAGONFLIES. 



35 



near their apices where their inner sides are a little flattened. 

 Lower pair very short, conical, parallel, and slightly curved 

 upwards. 



Text-figure 5. 



A. Femur of JRhinoneura villosipes, $ , showing Lairs. 



B. Anal appendages of Protosticta Icinabaluensis, $ . 



This very remarkable insect suggests several interesting 

 problems. Its wings, as will be seen from text-figure 4, have 

 all the characters which mark the small group of genera to 

 which it belongs, and these characters in all the other genera 

 are associated with a short depressed abdomen. The wings 

 sIioav a specialization approaching the condition found in the 

 Ocenagrionina?, unexcelled in any other group of Agrionina?, 

 and the question arises as to whether the specialization of the 

 wings preceded the development of a depressed short abdomen, 

 or whether this latter condition came into existence earlier. Or, 

 put different^, is the long and comparatively slender abdomen of 

 Rhinoneura a primitive condition lost in allied genera ; or does 

 it mark a departure in the evolution of the form which will 

 approximate physically still nearer to the slender-bodied 

 Ccenagrioninae ? 



One would like to know something of the meaning of the 

 "far" on the hindermost pair of femora, but unfortunately 

 speculation on this point is useless. 



16. Rhinocypha moultoni, sp. n. 



4(JcJ, 2 $ ?. 11.9.13, 16.9.13, 1.10.13 (Nos. 16, 22, 25, 

 57, 68, 1914). 



Length of abdomen, 3 18 mm., 5 17*5 mm. ; of hind wing, 

 S 22 mm., d 24*5 mm. 



3* 



