274 Mr. G. Lewis 



Xylon^us, gen. nov. 



Genus Tnjjwmeo forma similis. Corpus elongatum, cylindricura ; 

 pronotum parallelum ; pygidium couicum ( J ) vel compressum 

 ( $ ) ; prosternum mesosteruumque lougitudinaliter sulcata ; tarsi 

 elongati, oinues gracillimi. 



This genus is established to receive Ti-yponceus hijidus, 

 Lew., the sterna of whicli are shown in the figure given in the 

 Biologia Centr.-Amer., Coleopt. vol. ii. part 1, tab. 6. fig. 17. 

 T. fcilla.v, Mais., Ji/um, Mars., tuherculifrons, Mars., aculeatuSy 

 Lew., and columellaris, Lew., must also be assigned to 

 Xi/lomncs. My collection also contains some undescribed 

 species of which I have only female examples — in all there 

 are about 13 species. 



Xylonceus immarginatas, sp. n. 



Cjliudricus, niger, nitidus ; fronte tuberculata, rostro apice acuto ; 

 prouoto angulis anticis promiuulis ; prosteruo longitudinaliter 

 valdc sulcato, lateribus baud marginato, iu medio utrinque angu- 

 lato-dilatato. 



L. 4| mill. 



Cylindrical, black and shining ; the head is impressed 

 between the eyes, surface (and also that of the rostrum) 

 microscopically strigose, with shallow scattered punctures, the 

 base of the rostrum has a median somewhat compressed 

 tubercle and in front of it a shallow oval excavation, the point 

 of the rostrum is acute ; the thorax when viewed from above 

 is sinuous behind the eyes and the angles are somewhat 

 obliquely prominent, surface clearly and rather strongly but 

 not densely punctate, and there is an iiregular narrow median 

 space smooth ; the elytra are less clearly punctured and the 

 points are oval and closest along the sutural area; the pro- 

 ])ygidium and pygidium are punctured similarly to the thorax 

 and the latter is rather acutely conical ; the sterna are all 

 clearly canaliculate longitudinally, but have no marginal 

 striae or sulci, the prosternum is angularly widened out in the 

 middle and the surface is strigose rather than punctate ; the 

 mesosternum is distinctly and closely strigose; the metasternum 

 is strigose in the region of the canaliculation and punctate 

 laterally. 



The remarkable form of the prosternum of this species is 

 very dissimilar to any other known. 



Hah. Brazil. " Et de Sao Paulo, Ribeirao pires " {E. Grou- 

 7ieUe, November, 1898). 



