I 



THE ENTOMOLOGIST. 51 



tint approaching to yellow. The head is of a faint brown 

 tint, or very pale feuille-morte. The body is somewhat 

 slender, smooth, devoid of hair, and having two rather thick 

 folds on each segment reaching to the row of stigmata; of 

 these the first only is conspicuous, being comparatively large 

 and bordered with black, the others being much smaller and 

 having white borders. The mandibles are brown, and the 

 eyes, which are small, are placed in round black spots. The 

 thoracic legs are rather long and of a green colour; there 

 are, in addition, only six pairs of abdominal legs, and the 

 last segment is entirely destitute of the usual pair of anal 

 legs. The tail-end is somewhat pointed. This species does 

 not wave about the tail, and there is no trace whatever of 

 extensible glands between the legs. 



I left my larvae out of doors until the end of May, as I had 

 found by experience that the twigs of the pear, although 

 kept in water, very soon wither ; I then placed them in large 

 confectioner's glasses, which were filled up to a certain height 

 with damp mould. The larvae, one after another, let them- 

 selves fall from the leaves and crept into the mould. I 

 examined the glasses from time to time all through the 

 summer, looking to see if I could perceive any signs of life, 

 but in vain ; so that by October I gave up watching, hoping 

 to find the imago on the wing in the spring. However, the 

 month of May arrived and I had not seen an imago. I now 

 removed all the old pear leaves, and under them I found a 

 female imago, dead ; it had probably kept concealed among 

 the leaves ever since its emergence, and so I had failed to 

 discover it. I now turned all the mould out of the glass, a 

 little at a time, hoping still that I might find some pupae or 

 nearly-developed images, but in vain. I found nothing, and 

 was obliged to content myself with my solitary specimen : 

 this was a female, and as the individuals of this species, 

 taken by Mr. G. A. Six and myself in April and May, were 

 also females, I am unable to give a description of the male. 

 It seems that Hartig, who says of the present species "fliegt 

 mitte April in Garten," had also observed none but females. 

 It may be remembered that in the case of other species of 

 sawflies, even including some of the commoner sorts, the 

 males appear to be wanting, from which circumstance 

 Professor Siebold supposes that in Uie case of these insects 



