( Ixix ) 



measured, in the fresh state, 33 mm. in length and 57 mm. 

 across the fore-wings, the dimensions thus practically agreeing 

 with those taken from two continental specimens as given 

 in Mr. Lucas' " British Dragonflies," p. 82. The face was 

 greenish-white, and in both fore- and hind-wings the saffron 

 patch near the cubital point was connected with the basal 

 saffron patch. Eight more specimens, all males, were secured 

 at the same place on 19th August, when the weather was 

 very bright, and it was observed that the behaviour of the 

 insects was the same then as it was dui-ing the dull weather 

 of 12th August, with the exception that they showed no dis- 

 position to resort to the trees. We usually found the saffron 

 colour sufficiently conspicuous to render the species determin- 

 able at sight ; it was most noticeable when the insect rose to a 

 level with our eyes, when it was seen that the light in passing 

 through the wings had acquired a remarkable ruddy glare. 

 The colour of the thorax in the male has been stated to be 

 deep red, but we saw it as a brownish colour, in strong con- 

 trast with the red of the abdomen. It is doubtful whether 

 these insects were native to the localities where they were 

 found, for nothing was seen of them at the most prolific site, 

 which had been visited regularly, prior to 12th August, when 

 all the specimens examined presented the mature coloration 

 and several of them were damaged in respect of wings and 

 legs," 



Dr. F. A. DixEY exhibited specimens of Nychitona medtcsa, 

 Cram., Pseitclopontia pa/radoxa, Feld., Terias senegcdensis, Boisd., 

 Leuceronia pharis, Boisd., and L. argia, Fabr., remarking upon 

 them as follows : — 



"Though there does not exist, so far as I am aware, any 

 direct evidence that the members of the genus Nychitona* 

 are distasteful, their habits are such as to suggest this mode 

 of protection ; and there is, I think, little doubt that they 

 have served as models for other insects. We find, for instance, 

 a striking resemblance between the West African form of 

 N. medusa called by Aurivillius immaculata, and the remark- 

 able insect Pseudop)ontia paradoxa, Feld., as to whose affinities 



* I employ Dr. A. G. Butler's name for a genus wliich has been 

 variously known as Pontia and Lcptosia by ditferent authors. 



