85 



<//-o//i»> resiciilosa is smooth, without any hairs or only minute 

 ones. The ontogenesis is therefore probably like that of Boin- 

 hyx mori. 



Family Boinhijcidae. The caudail horn does not resemble that of 

 the Cemtommimlae according to Packard (1905, p. 20). 



This family is to be considered as originating from the Lasio- 

 rampidae. 



Dyar (1896/>, p. 140) says that '^Bombij.r mori hjis true warts 

 of the typical lasiocampid pattern". 



Grote (1896) pointed out, that the warts of instar / resemble 

 those of Endromis. 



Sasaki (1898, p. 33 sqq.) says that the dorsal horn in instar / 

 is already a single median wart and this not only on B. mori^ 

 but also on Theojihila mandarina^ which is considered to be the 

 primitive wild form. 



Packard (1905, p. 40 sqq.) says that stage 1 has warts, later 

 on the body is smooth or with minute hairs. 



The genus Ocitiam has a horn. (See i. a. Horsfield and Moore). 



Fracker (1915, p. 102) says that the setae are so reduced as 

 to be of little value in identification. 



In the literature the assertion is very often met with that Bomhyx 

 mori is naked. It is remarkable that this species, which has been 

 cultivated in such large quantities and is one of the few 

 insects which have become domesticated, has been observed so 

 insufficiently. Although indistinct, the old pattern of the verrucae 

 remains visible to the last moment of the larval stage. 



Bombyx mori L., Plate II, fig. 1 — 5. 



Material in alcohol at Groningen 1914, many specimens col- 

 lected every day, so that I had a very extensive collection at my 

 disposal. 



Instar /. Duration 40? days. Length 4 mm. The setae are not 

 feathered, about 400 ^ long. They are only placed on tubercula. 

 Most of the swellings are verrucae with four or five setae, but 

 s. subdorsalis, s. poststigmalis^ s. infrastigmalis remain separately 



