146 NEMATUS CBOOEUS. 



pale bluish-green. On the green part are three rows of 

 black dots, the first row almost continuous, the second 

 more widely separated, there being only four on each 

 segment ; the third row is composed of a smaller dot 

 in front, placed a little higher up, and two long ones, 

 following each other in a line. There is also a black 

 line over the legs. These black marks are irregularly 

 placed and much fewer on the orange parts, there 

 being, however, a line across the back, and there is a 

 large oval mark over the anus, joined to the black 

 cerci. 



The larvse when young make holes in the middle of 

 the leaf, but as they get older they feed along the 

 edge, often four or five being seen on one leaf. When 

 young they are dark green, and the markings are not 

 distinctly indicated. They often do considerable 

 damage to the various \villows on which they feed. 

 There are two broods in the year, the autumnal one 

 being as usual the largest. The double cocoon is spun 

 in the earth. 



As parasites Brischke records Mesoleius aulicus, Gr., 

 M. options, Gr.j and Cteniscus frigidus, Holm, (not a 

 British species). 



Not a common insect. In Scotland I have captured 

 it near Glasgow, Rannoch, Kintail, Aberdeen (Trail), 

 and Sutherlandshire ; that from the last-mentioned 

 locality being the Ab. b. I have seen several English 

 specimens, but do not know their exact localities. 



Stephens' specimens of N. testaceus are said to be 

 from near London. Mr. Fletcher has taken it at 

 Worcester. 



Its continental distribution is Scandinavia, Siberia, 

 Germany, Holland, France, and Italy. 



