INSECTA MADERENSIA. 297 



remainder (which are of equal size) have the intermediate pair somewhat wider 

 apart than the anterior ones, and those which constitute the circlet amoimting to 

 ahout iive or six in number. My solitary specimen was taken, during the summer 

 of 1850, in the vineyard of Senhor Louiz Acciaioly at Santa Anna. It is evidently 

 excessively rare, otherwise it could hardly have escaped further observation during 

 my constant researches in these islands. 



224. Leiparthmm bituberculatum, WoU. (Tab. VI. fig. .3.) 



Ii. subangusto-cylindricum nigro-fuscuni et pilis rigidis vestitum, prothorace aniplo, tuberculis (sc. 



duobus mox infra apicem, necnon in disco antico plurimis minutissimis in circulum vis dispositis) 



obsito, per marginem posticum fen-ugiueo, elytris rugulosis obscure striato-punctatis, antennarum 



basi pedibusque diluto-testaceis. 

 Var. /3. paulo minus, ferrugineo-fuscum, prothorace postice latius ferrugineo, antennarum basi 



pedibusque pallidioribus. 

 Long. corp. lin. §— ^. 



Habitat Maderam sylvaticam, in umbrosis graminosis inter 2000' et 4000' s. m. sitis baud infrequens : 

 var. ^. etiam ad locos subinferiores descendit, in castanetis Sanctse Annse sestate abundansj sed 

 status typicus montibus proprius est. 



Ii. cylindrical, but narrower than the last species, blackish-brown, and more densely clothed with (the 

 same character of) pubescence. Prothorax rather large, and beset with small and somewhat 

 distant punctures ; produced iu front, where it is armed with two small, porrected and obtuse 

 tubercles (which are most developed in the males), and with a few smaller scattered ones, on the 

 fore-disk, behind them, — which have a tendency to arrange themselves in a circle, though much 

 less evidently so than those of the L. mandibulare ; the hinder margin more or less narrowly 

 ferruginous. Elytra rugiilose, and with the same peculiarity of sculpture and pubescence as in 

 the last species, — except that the latter is more dense, and perhaps more evidently arranged in 

 alternate rows of robust and finer scale-like setse, or rigid pile; rounded and entire at then- 

 extremity. Antenna at base and the legs diluted-testaceous ; the former with their club a little 

 dusky. 

 Var. (3. a trifle smaller, and of an altogether paler hue, — being usually bright ferruginous-brown ; 

 and with the hinder margin of the prothorax, the antennae and the legs stUl paler. 



Both the present species and the following one are readily distinguished from 

 the L. Artemisia by the pustules of theu* pronota; whilst, inter se, the greater 

 size and more elongated form, in conjunction with the less developed prothorax 

 and different colour, will serve to separate the L. bituberculatum from the L. cur- 

 tum. It is not an uncommon insect within the sylvan districts of Madeira, be- 

 tween the limits of about 2000 and 4000 feet above the sea, — the typical specimens 

 occupying the upper, and the var. (5. the lower portion of this range. Thus, the 

 mountain state (which I have assumed to be normal, and which is somewhat 

 darker and larger than the other is apparently confined to the moist and shady 



2q 



