The Zoologist— July, 1809. > 1733 



middle of the blue dorsal stripe the skin was smooth, then carae three 

 white warta one below the other on the fold of the skin below the 

 spot : from the lowest of these proceeded a double row below the 

 spiracle extending upward to the other side of it. Below the stigma 

 was a projecting muscle or fat mass under the skin, which at that spot 

 was covered with sharp, more or less prickly warts. 1 have repre- 

 sented one of these six-pointed little warts at fig. 6, as it appears 

 when the larva is examined along the side with a very strong lens and 

 in the position of fig. 4. 



Figure 7 represents one of the anterior legs of the larva magnified : 

 when this object was examined with a lens the skin appeared to be 

 double at the joints, having single hairs on the middle of the segments; 

 below the base of the claw, which was curved and very sharp, was* a 

 round knob. 



The spiracles were somewhat of the shape of the impression of a 

 stag's hoof, that is to say, they were surrounded by a thickening of the 

 skin of a dark colour, which had some resemblance to the impression 

 of a stag's hoof in the wet sand. 



I never observed these larvye to eject any fluid as is done by other 

 Cimbex larvae, especially by those of Cinibex Amerinaj. T was also 

 unable to detect any ducts or openings above the spiracles. Zaddach 

 observes — " Die Larven spritzen wie die iibrigen Cimbex larven." 

 On the other hand Rosel says, " Ich mogte sie gleich noch so ofFter 

 beriihren, so bleibe sie doch allezeit trocken." Lyonet does not 

 mention any ejection of fluid. I took advantage of the skin of the 

 head, thrown off' in moulting, to sketch some of the parts of the mouth 

 — these are represented on plate 1, in the middle. Fig 9 is the semi- 

 circular labrum emarginate at the centre ; fig. 10 represents the man- 

 dible, on which I observed three small teeth ; and at fig. 11 is a drawing 

 of the maxilla, rather strongly dentate, with rounded lateral pieces 

 and a thick palpus tapering to a point. A large proportion of the 

 larvEe which 1 had collected at intervals during the autumn refused to 

 spin up, turned brown and hard, and died ; I was quite unable to dis- 

 cover the cause. Others spun up in a hard cocoon of a brown 

 colour, of which one is represented at fig. 12, plate 2 : this cocoon 

 was rough on the outside and covered with little pieces of wood, more 

 or less of a metallic tint, single, and very smooth on the inside. The 

 larvae remain from seventeen to eighteen months in the cocoon without 

 change of form ; this circumstance has been mentioned by former 

 writers on the subject, esj^ecially by Lyonet, who lays much stress 



