The Zoologist — February, 1871. 2479 



it from that locality ; the gray variety I have found in the wood at 

 the Hague, and along the road-side at that place, also in the wood 

 at Haarlem, and at de Beele, near Vorst; and it has been sent to 

 me by my friends Wttewaal, de Roo van Westmaas and Verloren 

 from Utrecht and Velp. It is certainly very singular that there 

 should also be some corresponding difference in the spines with 

 which the body of the larva is clothed; for on the gray larvae 

 I found, besides the forms shown at figs. 3, 4 and 5, also the forms 

 8 and 9, which the pale green larvae appeared not to have. How- 

 ever, in order to be able to state for certain that these latter 

 never had spines of these forms, it would be necessary to have 

 examined more larvae than I have had the opportunity of doing. 

 The larva in question is at most 15 mm. long; it has twenty-two 

 legs, and previous to the last moult the entire body is covered with 

 spines. The head is round, a little depressed on the forehead, 

 shining black or brown, and finely hirsute to just past the eyes; 

 in some cases a longitudinal olive-brown line is found on the 

 vertex, as shown in fig. 6. Further and downwards the face is 

 glabrous and sordid green, with brown cheeks. 



In the gray-green larvae the ventral surface was olive-brown. 



In some examples the first segment of the body has a transverse 

 row of furcate spines, white with black tips ; others have a row of 

 black simple spines, then a transverse row of black furcate spines. 

 There are four longitudinal rows of spines on the body (these are 

 represented at figs. 3 and 4), or, otherwise expressed, two trans- 

 verse rows of spines on each segment. There are besides, 

 on the projecting folds of the skin above the legs, a number of 

 furcate and simple spines, sometimes greenish white, sometimes 

 black. 



Figs. 2 and 7 and the forms of the spines, represented by figs. 

 3, 4, 5, 8 and 9, will aid in forming an exact idea of this arrange- 

 ment. The spiracles, of which one is indicated at a fig. 7, have 

 greenish or colourless margins, which makes them difficult to 

 distinguish. 



The thoracic legs, fig. 10, have brown claws, and close to them 

 rather thick tubercles below the last joint; they are very sparsely 

 hirsute. 



The last moult takes place in the middle of June, somewhere 

 about the lllh. After this moult they are entirely without spines, 

 almost smooth, of a yellowish green colour, having an orange tint 



