12 M. H. Jekel on (he PoUinosity of the Genera Lixns and larinus. 



of Grand Canary, where I obtained several specimens by brushing 

 the grass at the edges of the small marsh immediately behind the 

 sea-coast. 



II. — Remarks on the PoUinosity of the Genera Lixus and Larinus. 

 By Henri Jekel, Member of the Entomological Society of France, 

 &c. &c. 



The following paper, the manuscript of which was delivered to Mr. 

 White, of the British Museum, in January 1859, together with cer- 

 tain remarks on two species of Larinus, for Mr. Daniel Hanbury, to 

 accompany his note on the products of these two species*, has not 

 (from a misunderstanding on my part '?) been added to that note, but 

 was returned to me a few weeks ago by Mr. White. 1 had under- 

 stood Mr. Hanbury desired me, besides determining the two species, 

 to give a general account of the authors who had treated on the 

 habits of that genus ; hence the few remarks which 1 now beg for 

 acceptance in this Journal, hoping they will not be devoid of interest. 

 With respect to the tomentosity and pollinose transudation of Liocus 

 and Larinus, I think it will not be out of place to mention here a 

 fact until now overlooked, so far as I know. It appears to me, from 

 long observation of the covering adorning many Curculionideous 

 Beetles, that Nature acts, in clothing them, by layers or coatings. 

 There is, immediately above the derm of the elytra and thorax, ;i 

 thin tomentosc squamosity, either more or less piliform and opake, 

 or very fine, silky, and bright. This ground-layer, common to many 

 other tomentosc Coleoptera, is comparatively persistent, though far 

 more easily rubbed oft' than setiibrm or hairy pilosity, and is analogous 

 to the squamosity of species having one layer only. This tomentosity 

 is not produced by exudation, but grows according to the general 

 law, is susceptible of partial or total baldness, as in merely squamose 

 insects, and if rubbed oft, when the insect is alive, woidd be restored 

 in course of time only. Then comes the second layer, much less 

 persistent (even in non-pollinose species t), which in the above two 

 genera, as in many others, is a real pollinose transudation, suscep- 

 tible of a relatively immediate renewal when rubbed off the living 

 insect. Of this upper layer 1 need not remark, after the con- 

 scientious observations of M. (Wart, the highly interesting contro- 



* " Note on two Insect-products from Persia," in Journ. Proceed. Linn. Soc. 

 lii. p. 178(1855)). 

 t See mv analogous observations in ' Fabricia Entomologica,' i. 154. 



