368 CANARIAN COLEOPTERA. 



5GG. Lichenophagus impressicoUis, n. sp. 



L. species L. suhnodoso et sculptlpenni afRnitate proxima, sed ple- 

 rumque paulo major, nigrescentior ; elytris quadratioiibus, mixlto 

 magis nodosis setisque multo loiigioribus obsitis ; rostro et fronte 

 valde profunde excavatj-concavis ; prothorace basi sensim angus- 

 tato, profimdiiis punctate, conspicne inteqiiali (sc. in disco late 

 longeque impresso necnon iitrinque fovea media laterali subrotun- 

 data obscuriore notato). 



Variat elytris ad biimeros necnon in fascia postmedia valde fracta 

 plus minus obsoleta niveo-squamosis. 



Mas tibiis anticis intus minutissime serratis necnon ante apicem sat 

 distincte subexcavato-sinuatis. 



Fcem. tibiis anticis sensim latioribus, intus giabris rufo-ferrugineis 

 simpHcibus et ante apicem minus (tamen evidenter) subexcavato- 

 sinuatis. — Long. corp. lin. 2|-3. 



Habitat TenerifFam sylvaticam, in lauretis ad Las Mercedes et 

 supra Tagananam hand infrequens. 



This is the only LiclienopJiagus in which I have been able to detect 

 any sexual modifications (at all appreciable) in the anterior tibiae. 

 Even in this one indeed the characters, however decided, are rather 

 small ; nevertheless, when carefully inspected, it will be seen that the 

 males have their front tibite very minutely serrated internally, and 

 rather conspicuously sinuated (or subemarginate) before the apex, 

 whereas in the opposite sex the tibiae are not only a trifle broader 

 and less evidently scooped out, but likewise with their inner surface 

 fllahrous, rufo-ferruginous, and shining, and perfectly simple along 

 the edge. But, apart from this sexual peculiarity, the L. hnpressi- 

 colUs is well distinguished by its somewhat dark surface (which in 

 fresh and highly coloured examples is often ornamented with a few 

 small dashes of snowy-white scales — particularly at the shoulders 

 and across the hinder disc of the elytra, in which latter position they 

 occasionally assume the form of a broken, transverse fascia) ; by its 

 forehead (or perhaps, more properly, the base of its rostrum) being 

 very widely and deeply concave ; by its prothorax (which is percep- 

 tibly narrowed at the base and most coarsely punctured) being un- 

 even (that is, with a broad but rather shallow impression along the 

 fore disc, which is gradually contracted posteriorly, as well as with 

 an obscurer and rounded one on either side about the middle) ; and 

 by its elytra being comparatively square, considerably wider at the 

 shoulders than the prothorax, with their nodes greatly developed and 

 sparingly beset with extremely elongate setae. It is, on the average, 

 a trifle larger than any of the Lichmophagi as yet detected. 



The L. hnpressicolJls is eminentlj' a sylvan insect. Indeed hitherto 



