140 CANARIAN COLEOPTERA. 



race ad angulos anticos incrassato-atnpliato necnon ad latera plus 

 minus minutissime crenulato. Antenn(e et itistrumenta ciharia fere 

 ut in generibus Cryptophago et Paramecosomate ; sed mandibuUs 

 ad apicem grosse et longe bifidis necnon ad basin externam anguste 

 incisis ; palporum maxillarium artmdo basilari minuto (nee elon- 

 gate flexuoso), secundo elongate curvato clavato(nec brevi, sequentis 

 longitudine), tdtimo longissimo ; et mento ad apicem hand emargi- 

 nato, sed in parte media producto et ibidem obtuse rotundato. Pedes 

 ut in Paramecosomate, i. e. tarsism utroque sexu S-articulatis, arti- 

 culo penultimo minuto. 



As may be gathered from the above comparative diagnosis (drawn 

 out from the European L. elongatum, described below), I believe that 

 Leucohiynafium possesses sufficient structural peculiarities of its own 

 (as Dr. Kraatz has suggested — vide ' Berliner Ent. Zeitsch.' i. 190) 

 to warrant its separation from Paramecosoma . M. Jacq. Duval in- 

 deed, in his ' Genera des Coleopt. d'Europe,' has not adopted it ; but, 

 apart from its differences of external fades (which are very consi- 

 derable, and would of themselves incline us to suspect the presence 

 of other less obvious ones), its very conspicuously and deeply bifid 

 mandibles, in conjunction with the particular proportions (alluded to 

 above) of the joints of its maxillary palpi, and its unemarginated, 

 centrally-produced mentum, are, I think, more than enough to render 

 its isolation both natural and desirable. 



238. LeucoMmatium elongatum. 



L. fusco-ferrugineum, albido-pubescens ; capite prothoraeeque sat 

 parcc punctatis, hoc subquadrato postice paulo angustiore, angulis 

 anticis oblique incrassatis, ad latera miautissime crenulato, basi 

 utrinque foveola obscura punctiformi notato ; elytris subtihter 

 striato-punctatis, interstitiis uniseriatim pimctulatis. — Long. corp. 

 lin. 11. 



Paramecosoma elongata, Sturm, Deutsch. Fna, xviii. 72. pi. 342. f. a, 

 A (1846). 



, Erich., Nat. der Ins. Deutsch. ill. 371 (1848). 



Leucohimatium angustum, Rosenh., Die Tliiere Andalus. 179 (1856). 



Habitat Palmam occidentalem ; in regione calcarea mox infra Ar- 

 gual sita Junio ineunte a.d. 1858 specimen unicum sub lapide inveni. 



A single specimen of the Euroi)ean L. elongatum was captured by 

 myself, from beneath a stone, on the calcareous plain immediately 

 below Argual, on the western side of Palma, early in June 1858. It 

 occurs also, though very rarely, in Madeira, — two examples having 

 lately been detected, by Mr. E. A. Anderson, on the hills above 

 Funchal. 



