THE ENTOMOLOGIST. 27 



I find the larvae on the roses as early as May, and so on 

 through the whole summer until the end of August; and in 

 warm summers, as that of 1846, up to the middle of 

 September. They always frequent the under side of the 

 leaves, and eat out patches of the parenchyma, so that the 

 leaves have a blotchy appearance, as I have represented at 

 fig. 1. Afterwards, when the larvae have moulted for the third 

 time, they proceed to eat holes in the leaves and to gnaw the 

 edges. 



The larva grows to a length of thirteen millemetres. Like 

 the other Cladii, with the exception of Cladius viminalis,* it 

 is flatter and broader than is usually the case with the larvae 

 of sawflies, and has twenty legs, the 4th and lllh segments 

 of the body alone being apodal. In young larvae the head is 

 brown ; in full-grown individuals it is really green, but 

 covered with hundreds of minute brown points, so that, when 

 observed without a lens, it appears of the latter colour; it is 

 covered with comparatively long gray hairs; the eyes are 

 placed in round black spots, and the trophi are brown. 



The body, which somewhat decreases in diameter towards 

 the tail, is yellowish green, with a stripe of a darker tint along 

 the back (fig. 2). On each segment there are three rows of 

 little knobs (fig. 3) covered with very fine white hairs, those 

 of the last row being longer and of a darker tint than those 

 of the other two. Above each leg there are also two little 

 knobs of a more elliptical shape, and likewise hirsute ; these 

 are placed the one obliquely below the other. The abdominal 

 legs are entirely green ; the more horny thoracic legs are 

 glassy green, with brown claws. 



A few examples were green on the upper surface of the 

 back, and pale sordid yellow at the sides, with two lines of a 

 darker tint along the neck; one was entirely of a dull, 

 ochreous gray colour, but appeared to be sickly, and in fact 

 died before it had begun to spin up. As a rule the larvae of 

 this species are slow in their movements, and appear to crawl 

 with difficulty. They spin up among fallen leaves, or in 

 the cracks and crevices of the rose stems. The cocoon is 

 double, as represented at fig. 4; a being the outer, transparent 

 loose tissue, and b the interior one, which is always oval and 

 somewhat thicker, and is of a pale gray colour, or white. I 

 * See ' Tij JscLrift voor Eutomologie,' vol. i. p. 170, \)\. 10. 



