889 



Se;/ in. 8^1. Two s. Itasalcs. 



„ 9. No V. dorsalis, r. sHix/orsal/s and v. ,-<Hj)rasf/</iii((Iis vory 

 large and strongly projecting, v. hifrast'Kjinalis about as 

 largo as on 8, a wreath of s. hasales. 



„ 10. It is difficult to rediice the verrucae to tlio pattcrn of 

 the fonner segnients. I consider the wart iinder the anal 

 opening as a v. /iifr<isf/(/)iial/s. 



It seems to me that the two setae hasales of segm. 8 are pseudo- 

 primary ones. If tlie newly-hatehed larvae are exaniined many 

 individuals with a well developed wart are found. Most parts do 

 not become coloured, but only the two extreme setae. I do not 

 think therefore that this case should be taken as a proof of the 

 tliesis that warts have taken their origin from simple tubercuLa, 

 but I think we have to deal witli the secondary dissolution of a 

 wart into simple setae. 



The two dorsal glands which are so obvious in the following 

 instar on the segnients 6 and 7 are faintly visible. 



Instar II. Duration 10 days. Length O mm. 



All the setae are short-plumed, the side branches arise at irre- 

 gular distances. The form of most warts is about the same as of 

 those of instar /. The setae are not very different in length. 



Prothorax. V. dorsalis is small and is connected with that of 

 the other side by an indistinct prothoracic shield ; a very small 

 i\ suhdorsalis which is remarkable in connection with the size it 

 possesses in instar 7, neither is it connected anymore with the pro- 

 thoracic shield. V. suprastig malis is very large and projects con- 

 siderably. On it are the longest setae (2 mm., short feathered) 

 and between these are mostly five short ones, which are much 

 thicker and have longer plumes. It is an exception when they 

 are longer than ^/^ mm. V. infrastigmaUs is small and is no 

 longer so tall, v. hasalis too is small. 



Mesothornx and MetatJiorax. We find the following small warts : 

 /•. (lorsalis^ V. dorsolateralis^ v. suprastigynalis.^ v. infrasfigmalis, 

 0. hasalis. 



Ahdoinen 1. V. dorsalis is small, v. sulxlorsalis very large with 



