MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



7a 



Fig. 31i represents the freshly hatched larva of Hepialiis mtistelinus, 1.3 mm. lu length. The 

 head is no wider than the prothoracic segment, whose dorsal plate is well developed. The month- 

 parts are qnite large, especially the spinneret, while the hairs, which are acnte at the end, are in 

 this stage as long as the body is broad. Fig. 31i, A shows the arrangement of the one-haired 

 tubercles on the thoracic and first abdominal segment, and fig. 31i, B those on the four terminal 

 segments. The abdominal legs appear to have at this stage only ten crochets, or at least 

 very few. 



-mx.pt 



FlQ. 32 1, 2, FiiU-fed larva of Stpialus humuU; 3, 4. H. hectus. 



(Cut loaned by the Ne^v York Entomological Society.) 



Fig. 33.— Pupa of Oncopera intricata,- 

 A, end of body enlarged; sp, .spiracle. 



Fig. 32i.2 repi-esents the larva of the European Sepialus hiimuU ^.und the arrangement of the 

 one-haired tubercles; the prothoracic plate is thin and slight. In R. hectus (fig. 323,4), which is more 

 specialized, the prothoracic plate is more developed, and the piliferous tubercles (except one) are 

 mnch larger, forming plates. Yet this larva will be seen to be much less specialized than that of 



' For blown specimens of this and Hepialus hectus, and numerous other rare specimens of other larvae and pupaa, 

 I am greatly indebted to the kindness of Dr. O. Staudinger, who presented them to me from the immense collectioa 

 of Lejiidoptera and other insects in his establishment at Blasewitz-Dresden, Germany. 



