2 ARKIV FÖR ZOOLOGI. BAND 3. N:0 22. 



the larva exhibits some remarkable features, Avhicli seem to me 

 important enough to deserve attention. 



Description (Figg. 1 and 2). 



The greatest larvse attain the length of 18 mm. and a 

 widtli varying from 1 to 1,5 mm. The colour is a yellowish 

 white, the head, the cervical or prothoracic shield as well as 

 the suranal and prseanal shields being of a bright reddish-yellow 

 colour. 



The three pairs of thoracic legs are well developed and of 

 the usual shape. The four pairs of abdominal feet are provided 

 with closed rings of hooks, the anal feet with a ring open at 

 the back. 



The first se ven abdominal segments liave a pair of lateral^ 

 fingershaped, conical appendages, which are situated near to 

 and directly behind the spirades and point obliquely upwards 

 and outwards. The proximal part of the appendages is of uni- 

 form thickness, on the dorsal side of white colour, with a brown 

 patch underneath, the distal half being brown all round, lumi- 

 nous and gradually narrowing towards the rounded hyalin end. 



The cuticle is not smooth, but minutely spinulated, the 

 spinulse which are more or less curved and bent being mere 

 thickenings of the cuticle. There are two kind of hairs; the 

 smaller ones which are very minute, almost microscopical, are 

 found on the appendages, while the larger ones are to be found 

 as well on the appendages as, in numbers varying from 8 to 12, 

 on the tops of the segmentally arranged verruciform tubercles 

 in which the dorsal side is folded. The tubercles are arranged 

 in transverse rows of three pairs of which the middle pair is 

 slightly larger than the other. 



Thorax Abdomen 



23 12345678 



Nuniber of rows 4 4 1 ; 3 | 4 j 5 I 5 ; 5 i 5 i 5 | 3 



The hole cuticle of the larva is, when alive oily and espe- 

 cially the appendages shine with fat. 



Of the spirades the prothoracic and the last pair are the 

 largest. They are missing on the 2 and 3 thoracic segment. 



The antennae (Fig. 4) are short, threejointed. The third 

 joint is very small and has the appearance of an appendage 

 to the second joint. The third joint is provided with one and 



