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TEXT-BOOK OF ENTOMOLOGY 



the relative position of the germs (imaginal buds or folds) of the 

 wings and of the legs are seen. 



W 



FIG. 606. Section through thorax of a tineid larva on sycamore, passing through the 1st pair 

 of wings (w) : ht, heart ; i, cesophagus ; s, salivary gland ; ut, urinary tube ; nc, nervous cord ; , 

 recti muscles ; a part of the fat-body overlies the heart. A, right wing-germ enlarged. 



These imaginal buds in a more advanced .stage are seen in our 

 sections of a tineid larva (Figs. 606, 607). 



The number of 12 imaginal buds found by Weismann in the 

 thorax of Muscidae does not occur in Lepidoptera, since, as in the 



w-. 



I 



I 



Fir,. 607. Section of the same specimen as in Fig. 606, but cut through the 2d pair of wings 

 (w): /,' mid-intestine; h, heart; fl>, fat-body ; I, leg; n, nervous cord. 



Hymenoptera (Hugnion), the dorsal buds of the prothoracic segment 

 are wanting. Gonin finds in Pieris that the ventral buds of the 



