1881J 119 



more allied to Rogenhoferi in colour, since the fore-wings are " of a 

 dirty grey, plentifully sprinkled with white and brown scales so as to 

 form here and there spots or streaks." Pteropkorus monodactylus is 

 distributed in America as in Europe ; according to Staudinger, it 

 extends into Armenia ; it is, therefore, one of those species whose 

 range in the Northern hemisphere is very wide indeed. The chief 

 interest attached to it here is that our author records the two well- 

 known European varieties, the one fawn-brown, the other with the 

 fore-wings of a pale grey, sprinkled with darker spots and streaks. 



The Lioptili are well represented, ten species being here described, 

 of which six are new to science, one, L. paleaceus, having been before 

 described by Zeller, one, L. sulphureus, by Packard, and two others, 

 agraphodactylus and homodactyhts, by Walker : the type-specimens in 

 the British Museum enable these last two to be identified. In a genus 

 where all the species are so closely allied it is useless to make any 

 enumeration, the most notable, as far as beauty of colouring is con- 

 cerned, are L. sulphureus and L. helianthi, the former a large species 

 much bigger than our L. osteodactylus, expanding 25 mills, and having 

 the fore-wings a bright sulphur-yellow ; the latter, L. helianthi, re- 

 sembling somewhat a very large and brightly coloured specimen of 

 Lienigianus. L. homodactylus is whiter than any European form, 

 but the most remarkable of the group is a new species, Lioptilus 

 parvus. The palpi in this are described as "long, well clothed, 

 sharply pointed, and twice the length of the head," this is certainly 

 very different from the usual palpi of Lioptilus, which we may define 

 as " shorter or slightly longer than the head, delicate, pointed, almost 

 cylindrical, with the third joint sometimes drooping." Our author 

 has, however, acted wisely in not creating a new genus for his single 

 specimen, but in merely indicating the divergence ; it is a small 

 species with the fore-wings " dusty grey sprinkled with fuscous scales." 



In the genus Aciptilus there is a great falling on in the number 

 of species, as compared with those of Europe, and in these there is an 

 evident tendency to an aberration from the type-form. Three species 

 are given, all of which are now before me : two of these seem un- 

 doubted Aciptili, the first, A. cinerascens, Wlsm., is very similar to L. 

 Lienigianus in colour and size, the other, A. tnontanus, "Wlsm., is about 

 the size of A. pallidum, but is white with brown scales, and a costal 

 streak of the same colour ; the third, A. californicus is a most re- 

 markable insect, with the wings of an Aciptilus but the colouring of 

 an Oxyptilus, and with the same " tuft of projecting scales in the 

 fringes of the third lobe of the hind-wings." Our author says, "its 



