NEMATUS FLAVESOENS. 149 



The larvae feed gregariously on the leaves of Salix 

 cinerea in the autumn. The head is a little narrower 

 than the second segment, intensely black, slightly 

 punctured, the sides of the mouth somewhat greenish. 

 Feet glassy-white, with a slight tinge of green ; 

 claws black; claspers light green. Body of a beautiful 

 dark sea-green. On the sides are ten large oval 

 orange spots, divided by the folds of the skin in two, 

 but quite continuous. Below these is a line of roundish 

 irregular black dots, under these again, and over each 

 clasper, is a longish, oblong black spot, while there 

 are two rows of small black dots ; these, however, form- 

 ing the commencement of the middle line of black 

 dots. Over the orange marks is a line of close con- 

 tinuous black dots, irregular, but somewhat oblong, 

 and proceeding from the second to the twelfth segment. 

 On the back are, at the termination of each segment, 

 two rather small roundish dots. Directly over the 

 anal segment is a large round black mark, much larger 

 than any of the others. The first orange spot is 

 directly over the second pair of legs. Length 1| inch. 



The cocoon is of the usual form and colour, is 

 double, and is spun in the earth. Seemingly rare. 

 I have only met with the larvae once, in the autumn, 

 near Port Glasgow. 



Possibly this species may be identical with N. ferru- 

 gineus Foer., Yer. Verh. pr. Rhein., xi, 282 ; Br. and 

 Zad., Schr. Ges. Konig., 296. 



70. NEMATUS FLAVESOENS. 

 PL VIII, figs. 9, 9a-6, Lar.; PL XXIII, fig. 6, Saw. 



Nematus flavescens, Ste., HI., vii, 29, 10; Kirby, List of Hym., 

 i, 125, 167, pi. vii, f. 8. 



pallescens, Htg., Blattw., 216, 48; Cam., Fauna, 40, 



45 ; Andre, Species, i, 180 ; Cat., 25, 

 199 ; Br. and Zad., Schr. Ges. Konig., 

 297. 



croceus, var. h. Thorns., Opus., 637. 



