422 INSECTA MADERENSIA. 



latter, — particularly in the dried bimclies of Bamalina scopulorum and JEvernia 

 jn'vnastri, in company with the Ptinus fragilis and other insects which delight in 

 such situations. 



Sectio VIII. EUCERATA. 

 Pam. 37. CERAMBICID^. 



Genus 137. STROMATIUM. 



Serville, Ann. de la Soc. Ent. de France, iii. (1« serie) 80 (183i). 



Coi-pus magnum, clongatum, parallclum, pubescens, leviter depressum : capite subporrecto ; oculis 

 valde emarginatis (subluniformibus) : prothorace tequo ; ad latera in maribus rotundato-excavato, 

 excavationc pilorum pulrino instructii : alls amplis. Anteniue ante margiuem oculorum internum 

 inserts;, longissima; (praesertim in maribus), setacefe, basin versus birsuta;, articulo primo robusto, 

 secundo brevissimo, tertio elongate, rebquis huic paulo brevioribus longitudine subsequalibus, 

 latitudine vix decrescentibus. Labrum membranaceum breve transversum, pilis longissimis 

 munitum, apice vix cmarginatum et in medio setoso-pencillatum. Mandibula magnje cornese 

 vaHda;, basi latse, apice acuta, intus ante medium dente obtusissimo rotundato instructte. Maxilla 

 biloba; submembranaceae, lobis valde pubescentibus pencillatis. Palpi robusti, vis clavati ; 

 maxillares articulo prime parvo, secundo et ultimo longitudine subtequalibus (boe subovato apice 

 oblique truncate), tertio paulo breviore; labiales e scapis ligulce connatis surgcntcs, articulo primo 

 parvo, secundo paulo longiore, ultimo crassiore elongate-ovate apice suboblique truncate. Mentum 

 submembranaceum transversum antice angustatum, apice prefunde cmarginatum. Ligula mem- 

 branacea, apice bileba, lobis divergentibus valde pilosis. Pedes elongati : femoribiis compressis 

 subliuearibus : tarsis (ut in bujus scctionis reliquis) pseudotetrameris. 



Stromatiinn may be readily knoTVTi by the structure of its prothorax, — which 

 has the sides, in the male sex, slightly hollowed or scooped out, the excavation 

 being filled up with a dense cushion of hairs ; it has also its upper siuface fi'ee 

 from iuequalitics, and without any appearance of the more or less poMshed tuber- 

 cles which are apparent in Fhymatodes and Blahinotiis. In the details of its 

 trophi it does not offer any great peculiarities ; nevertheless its more filiform, 

 though somewhat robuster, palpi (the terminal joint of which, instead of being 

 securiform, is ovate, and truncated at its extremity), in conjimction with its 

 deeply cmarginated mentum, should be especially noticed. The thii'd articulation 

 also of its antennaj is distinctly longer than the fourth (wliich is scarcely the case 

 in any of the follomng three genera) ; and its femora are sublinear and com- 

 pressed, — being somewhat narrowed towards their apex, instead of abruptly 

 clavatc. Apart from the entire edges of then- prothorax, the females (as in the 

 Eucerata generally) may be recognised by being, on the average, of a rather larger 

 size, and by their antenna; being proiiortionahly a little more abbreviated. 



