8410 



Insects. 



is somewhat curved in shape and prolonged downwards at the ends ; 

 the claws were brown, and on the under side at their base a cushion- 

 like eminence was visible. The fourteen middle legs and the two 

 hind legs were of the same colour as the belly and the side, as also 

 the anus, but upon the outer side of each leg there was an olive- 

 coloured spot. 



These larvae were generally rolled up spirally, so that the head was 

 lower than the tail ; when walking they were very sluggish and slow 

 in their movements. We subsequently found that they attached 

 themselves to the under side of the leaf as much as to the upper. 



They had undergone the last moult but one. After the last moult 

 the colouring was much paler ; the head was then obscure brown 

 instead of black ; the back brownish green, but the under side had 

 assumed a somewhat browner tint. 



On the 6th of June and following days these larvae buried themselves 

 in the earth which was given them in their cage ; they made a cocoon 

 stuck together with grains of earth. 



I was not fortunate enough to observe the pupa, but on the 5th of 

 November of the same year I received from my friend Wttewaal two 

 imagos, which, although probably some time previous, had emerged from 

 the cocoon. From the colour of the antennae and the beautiful red colour 

 of the femora I immediately recognised the species which Panzer, in 

 his 4 Faunae Insectorum Germanise Initia,' has named Tenthredo tibialis, 

 and which had previously been taken by me at Heemstede in August, 

 and by M. van Bemmelen at Brummen and Oosterbeek. According 

 to Hartig it occurs in Sweden and Austria, where, however, it is 

 scarce. 



It is uncertain whether this is the same species as the T. tibialis of 

 Le Peletier de Saint-Fargeau (Monog. Tenthred. No. 348), and which 

 w T as taken near Paris, for the legs are described as somewhat differing 

 in colour; it must, however, be the same as Gmelin's species, No. 114, 

 which he calls T. braccata. 



This pretty sawfly has the head broad, depressed, black, studded 

 with some very short hairs ; eyes also black, of moderate size, elliptic, 

 protruding. Upper jaws rather sharp-pointed, the base and apex black, 

 intermediate portion ferruginous ; palpi black at the base, the colour 

 inclining to gray, and becoming much paler at the terminal joints. 

 Antenna? as long as the head and thorax together, moderately thick, 

 more or less hairy ; the first five joints dull black, the sixth, seventh 

 and eighth clear white, the ninth smaller and black. I may here 

 mention that in one of my examples the right antenna shows a 



