122 Mr. J. W. Dunning on 



figured the male A. Garnonsii. He placed the genus in 

 the Order Trichoptera, fam. Phryganeidce ; but he re- 

 marked that, " so near an approach does Acentropus make 

 to the Lepidoptera, that if the palpi were broken off, it 

 would not be easy to decide to which Order it belonged, 

 whether to the Trichoptera or Lepidoptera. The mealy- 

 texture of the insect might induce an opinion that it was 

 Trichopterous, whilst the contour and neuration of the 

 wings would be in favour of its relation to the Lepidop- 

 tera. The absence of a proboscis proves nothing, since 

 it is sometimes wanting in the Bomhycidce and other 

 groups. I do not, however, remember any instance 

 amongst the Lepidoptera in which the maxillary palpi are 

 strongly developed, and the labial absent ; yet such 

 appears to be the case in Acentropus." 



In 1835, in the first volume of our 'Transactions,* 

 Westwood, after examining the original specimens, iden- 

 tified Acentria nivosa with Acentropus Garnonsii, and 

 mated them with Zancle Hansoni as the female. And in 

 the same paper he pronounced the insect to belong to 

 the Lepidoptera, relying not only on the scales of the 

 wings, but particularly on the presence of the thoracic 

 tippets, and the bristle at the base of the hind- wing. 



In 1836, Stephens, in his 'Illustrations,* adopted West- 

 wood's conclusion as to the identity of Acentria, Acen- 

 tropus, and Zancle, and united the three under the name 

 Acentropus niceus. It is manifest also that he thought 

 the genus belonged to the Lepidoptera, but " having 

 completed the Lepidoptera,*' he " temporarily " placed the 

 *' Acentropidw " at the beginning of the Trichoptera, 

 " rather than omit all notice of this singular family." 



In 1840, Westwood, in his ' Introduction,* returned to 

 the subject, and unhesitatingly placed Acentropus in the 

 Order Lepidoptera. 



In 1843, Boitard mentioned Phryganea nivea, but he 

 simply reproduced (with a verbal alteration) the brief 

 description given by Latreille, and does not appear to 

 have known anything about the insect itself. In 1848, 

 Kolenati, and in 1852, Walker, rejected Acentropus from 

 Trichoptera, and referred it to the Lepidoptera. 



In 1856, Brown again called attention to the Order to 

 which this genus belongs ; and afterwards, in a paper 

 read before the Northern Entomological Society, having 



