9752 Insects. 



ferruginous scar, as if the epidermis had become loosened and the 

 under-l^ing tissue was wrinkled (fig. 16). I conclude that at this spot 

 the epidermis had been opened by the saw of ihe female, and in the 

 incision so made the eggs had been deposited. 



The 3onng larvae were green with merely a trace of yellow on the 

 second and penultimate segments. They differed, moreover, con- 

 siderably from the full-grown individuals, in that their heads and 

 thoracic legs were shining black, but they already exhibited the rows 

 of black dots and the black anal spot. Figs. 1 and 2 represent the 

 young larvae at different periods of growth. 



On the 17th of June of the following year the first imagos of those 

 which I had in confinement made their appearance, thus having 

 passed ten months and a half in the cocoon ; that is to say, unless all 

 the July larvae had died, and only those taken in September had pro- 

 duced imagos ; in which case they would only have been eight months 

 in completing their metamorphosis. Judging from the nuuiber of 

 imagos I got 1 think the first supposition the more probable. It was 

 immediately evident from the structure of the antennae that these 

 imagos belonged to the genus Hylotoma, these organs being composed 

 of only three joints, the first two of which were very small, and the 

 last unusually long. In the male this last division was slender, curved 

 upwards, of the same thickness throughout, and closely covered on 

 one side with fine separate hairs (see fig. 11). In the female this 

 part was shorter, slightly clavate and smooth (see fig. 12). 



The imago (fig. lOj is pretty stout, the head and thorax somewhat 

 hirsute, for the rest smooth. Length 8 millimetres, expanding to 17, 

 Head black, having the eyes brown ; palpi yellow ; antennae black, 

 having occasionally a red or yellow tinge on the upper surface. The 

 thorax is yellow, except on the dorsum, from the prothorax to a spot 

 above the scutellum, and at the sides to within the tegulae ; under- 

 neath, on the breast, is a shining black spot. The abdomen is shining 

 yellow, with merely a little black on the margins of the valves of the 

 saw and of two little projections on the last segment. Legs yellow, 

 with little black spots on the coxae and apophyses ; the apices of the 

 tibiae and of the first three joints of the tarsi, as likewise the last two 

 joints, are also entirely black. On either side of the claws are some 

 stiff setaceous hairs, and between them a pad. The wings are 

 yellowish, from their insertion to beyond the middle ; the space 

 between the costal and post-costal nervures is black, as is also the 

 stigma, this latter being bordered with yellow ; further all the ner- 

 vures are deep yellow, except the one between the second and 



