FIELD NATURALISTS' CLUB. 173 



Tithorea flavescens and Sais eurymedia. Specimens may be 

 captured all the year round and their metamorphoses are under- 

 gone in the short period of about a month. 



Notes ox " Ageronia Ferouia" and " Oyncecia Dirce." 



The larvse of the former are solitary and at first they are 

 green. Head in proportion, body blackish covered with branched 

 spines, there are two horns on the head (which is minutely 

 spined) slightly curved, black, and clubbed at the tips with 

 a few small spines. On the first segment a pair of long spines 

 branched at the top and covered with minute spines to the root. 

 On all other segments these spines are branched but there a~e 

 no minute spines at their sides, and they are slightly shorter. 

 There is a lateral row of spines, small and finely branched 

 rising from lilac spaces with three intermediate white spots. 

 On close examination there are dark and light brown spaces, 

 not sufficiently prominent to be noticed otherwise. I have 

 found the larva? in October. The imagos appeared on the 27th. 

 The pupa? are remarkable, the two horn-like projections on 

 the head are flat and slightly waved. From a side view 

 there are to be seen two dorsal humps, the upper one rounded, 

 and the lower more angular, sloping down gradually, and 

 forming a depression which again slopes up causing a slight 

 thickening at the end of the abdomen ; the color is dark green 

 with lighter tints of the same hue, suffused here and there 

 with yellowish tints, and marked with brown. The manner in 

 which the crackling noise is produced by the perfect insects, 

 and the peculiar manner in which they stick close against the 

 trunks of trees afford a great deal of interest, and deserve 

 attention as striking peculiarities ; the former habit was noticed 

 by Darwin in his book "The Naturalist's Voyage," page 33, 

 in which work they are called Papilio feronia. " This is the only 

 butterfly I have seen which uses its legs for running. They are 

 very active, flying round and round in chase of one another and 

 crackling loudly when at close quarters, frequently choosing the 

 Palmiste, on the side of which they rest, about ten or twelve 

 feet from the ground, against the trunk, and they may be passed 

 by without being noticed, protected by their striking resemblance 

 to the discoloured spots where some fungus growth or whitish 

 portion conceals them. They stick close against the trunk in 

 the invariable position, head downwards, except when about 

 to lay their eggs, on the low creeping vines ; then they may be 

 seen flying alone, with a series of sharp, regular, jeiks, gliding 

 along, and at this period, I suppose it is about the only time 

 they ever alight on anything green against which they would 

 offer a striking mark." According to Mr. Doubleday the noise 

 they make is produced as follows : — " They are remarkable for 



