PARAPONYX STRATIOTATA. 85 



yellowish-flesh tint, but as it approaches maturity 

 the wings appear a darkish grey-brown, and show the 

 darker outlined central spot ; the eyes also become of 

 the same dark colour, the thorax and legs light 

 brown, the abdominal segments whitish-flesh colour 

 transversely barred with light brown ; there is also a 

 faint dorsal line of dusky spots, and a light brown 

 spot on either side of each of the three segments 

 before the last ; the spiracles are of a light orange- 

 brown, ringed at the base with blackish, (William 

 Buckler, 2l st September, 1875; E.M.M., December, 

 1875, XII, 160—163.) 



HYDROCAMPA NYMPHjEATA. 



Plate CLI, fig. 3. 



I am glad to express my thanks to Mr. Henry 

 Laver, of Colchester, for the welcome gift, on the 

 5th of July, 1875, of two aquatic larvae which proved 

 to be of this species, and also for a supply of Pota- 

 mogeton natans, the plant on which he had found 

 them feeding; and I venture to suppose that some 

 account of my observations may perhaps be accept- 

 able. 



These larvse — differing much in size, but, as pre- 

 sently appeared, both nearly full-fed, the difference 

 in size being a sexual distinction, the female being 

 larger than the male — were inhabiting cases floating 

 on or near the surface of the water; the length of 

 the largest case was one and a half inches by three- 

 quarters in breadth, the smaller case not more than 

 three-quarters of an inch long by three-eighths broad ; 

 both of a flattish and somewhat oval general figure, 

 formed with two pieces of the Potamogeton leaf 

 placed one upon the other, and fastened together 

 with silk at the sides ; the component pieces not cut 

 quite alike, for at one part the upper piece projected 

 a little beyond the lower, and at another part the 



