330 INSECTA MADERENSIA. 



plaga (plcrumquc sub-oblunulata) coinmuni postmedia postice sufFusa (fere ad apicem eontinuata 

 et antice solum nigro-terminata) plus minusve distinct^ ornatis. 

 Far. fi. elytrorum macula postmedia non solum ad apicem, sed etiam usque ad basin retrorsum 

 ducta, plagam suturalem sufFusam postice ampliatam efficiente. 

 Long. Corp. lin. 2-3. 



Hnbitat per regionem ^ladera? sylvaticam, a 3000' usque ad 4000* s. m. prsedominans ; ad Ribeiro 

 Frio et Lombo dos Pecegueiros mensibus Julio et Augusto a.d. 1850 a meipso repertus. 



A. oblong-ovate, densely variegated with yellowish-brown scales. Rostrum as in the other species. 

 Prothorax with a shallow dorsal channel, and with two very setose tubercles across the central 

 portion (the two lateral ones being small, and generally scarcely apparent) ; produced, and 

 densely setose, at the apex, where the setfe arrange themselves into two distinct fascicles. Scu- 

 tellum not quite so ])erceptible as in the A. Van. Elytra punctate-striated; and with the sides 

 tolerably rounded, somewhat uneven, and a little projecting ; with several rather large, more or 

 less setose, interrupted ridges and nodules, those behind the middle being considerably developed, 

 though not quite so much as in the last species ; and with a transverse, more or less anteriorly- 

 convex, postmedial patch, common to both (suffused behind and usually continued to the apex, 

 being terminated in front only by a durkcr ])ortion of the surface, — where however that portion, 

 from the base being somewhat jialc, frequently takes the form of an obscure, transverse, brownish 

 band), more or less distinctly paler. Antenna and let/s as in the last species. 

 Var. /3. with the postmedial patch, not only suffused behind to the apex, but likewise continued 

 anteriorlij to the base, — forming a wide and indistinct sutural band which increases in width 

 j)osteriorly. 



Although of course much smaller than that insect, the present Acalles hears a 

 slight prima facie resemblance to the common Ci'iiptorlninchas Lapathi of more 

 northern latitudes ; and it may be known from the other Madeiran species, not 

 only l)y the yellowish-brown scales with which it is for the most part densely 

 variegated, ])ut likewise by its postmedial patch being generally more or less 

 convex anteriorly, and suffused behind to the apex, — its front edge being alone 

 1)ouu(led by a darker portion of the sm*face. That darker portion, moreover, from 

 tlic elytra being obscurely pale at their l)ase, usually assumes the form of an 

 indistinct, bro\niish, transverse band, fading off gradually in front, but thickly 

 clouded in the opposite dii'cction; — an arrangement by which the dullest and 

 briglitest of the tints are brought into direct contact, in a rather peculiar manner, 

 immediately beyond the middle. It is apparently, like the A. Van, confined to 

 the sylvan districts, tliough of a somewhat lower elevation, — being more par- 

 ticularly abundant between the limits of from 3000 to iOOO feet above the sea. I 

 have captured it in the region of the Ribeii'o Trio, dmiug May and August ; and 

 at the liombo dos Pecegueiros in July. 



259. Acalles omatus, WoU. 

 A. oblongo-ovatus, squamis griseo-brunneis variegatus; prothorace transversim valde setoso-tubcr- 



