THE ENTOMOLOGIST. 71 



in his ' Beschreibung neuer oder wenig bekannter Blatt- 

 wespen,' that the larva of Feniisa pumila lives in the same 

 way in the leaves of the alder; he has also described the 

 larva of Fenusa Betulae, sihi, as living in the leaves of the 

 birch. 



The snbject of the present paper is a species of Phyllo- 

 toraa (a genus new to the Fauna of the Netherlands), the 

 larva of which, hitherto undescribed, has a nearly identical 

 habit. It is, however, more especially remarkable on account 

 of its method of spinning up, and the number and structure 

 of its legs. 



I am indebted to ray friend, P. C. T. Snellen, for my 

 acquaintance with this insect. In the middle of September, 

 1861, 1 received from him some larvae, which he had met 

 with in bladders on alder-leaves, in the neighbourhood of 

 Rotterdam. He had noticed similar larvae before, and had 

 taken them for a species of moth ; but on rearing them 

 lie had found them to be Hymenopterous larvae. The 

 specimens, or the specimen, which he had reared was, 

 however, no longer in his possession, so that I was wholly 

 uncertain as to its appearance and species. The alder-leaves 

 which were sent to me had simply a scar where the parenchyma, 

 between the upper and lower epidermis, was wanting, as 

 shown at fig. \n. On holding the leaf up to the light it was 

 apparent that it had been eaten out, as the rays of light 

 showed the presence of a little animal of an oblong shape, as 

 also some pieces of excrement. On opening one of the 

 leaves I found a flattened white larva, 8 mm. long, differing 

 conspicuously from the usual appearance of sawfly larvae. 

 The depressed form of the larva, and the breadth of its 

 anterior segments, gave it the appearance of an Orchestes 

 among the Coleoptera, while the absence of abdominal legs 

 presented itself as a singular feature among sawfly larvae not 

 belonging to the genus Lyda, to which, however, it could not 

 be referred on account of the shortness of the imperfectly 

 developed thoracic legs, the absence of the two jointed anal 

 projections, and the fact of its solitary habit. 



The larva (fig. 2) was greenish white, depressed, broad, 

 and diminishing in width from the head towards the tail ; 

 head short and broad, ferruginous, with dark eyes and brown 

 trophi. On the dorsum of the 1st segment were two black 



