( 255 ) 



• Monocloeus gen. nov. 



Rostrnm triincale, vertical, flat, without carina. Antennal cavity sliar]ily 

 limited behind, its njiper edge not continued Ijackwards to eye. Eye oblique, 

 elliptical, very prominent. Prothorax without basal longitudinal carina, or 

 this carina vestigial ; autebasal carina not at all or very feebly curved forwanl 

 laterally ; snbbasal carina vestigial at the side or altogether absent. 



Type : M. claphrinui^ spec. nov. 



~7. Mouocloeus elaphrinus spec. nov. 



c?. Black, antenna and legs rufous, basal half of femora brown. Rostrum, 

 head, prothora.x (above and below), scutellum, some spots on meso-metasternuni 

 and abdomen, and a thin median ring, each on femora and tibiae white; two basal 

 spots on pronotnm black ; occiput, elytra and rest of underside olive-brown, 

 shaded here and there witii grey. 



Rostrum half as long again as broad, straight at the sides, somewhat dilated 

 above the antennal cavities, transversely raised between these dilatations. Frons 

 between eyes half the width of the rostrum. Eye minutely incised beneath. 

 Antennal segment 2 elongate, pear-sha])ed, o half as long again as 4, 3 to s 

 gradually decreasing in length, 8 little longer than broad, club loose, 9 nearly 

 twice as long as broad, truncate, 10 as long as broad, heart-shaped, 11 longer than '■) 

 and somewhat broader, ovate. Trothora-x with the carina situated before basal 

 third, gradually narrowed from carina to apex and to base, disc somewhat 

 depressed transversely, apex convex ; carina interrupted mesially and laterally, 

 convex in middle, irregularly and rather slightly biconcave laterally, not produced 

 forward at side of thorax ; white pubescence less dense in some places on disc. 

 Elytra oblong, widest before apical declivity, with large punctures situated in 

 depressions, not distinctly striate, except at the sides, strongly depressed at tlie 

 base, impressed between the somewhat elevate humeral angle and the subbasal 

 callosity ; the latter high, subdivided by the impressed third line of punctures ; a 

 tubercle in centre of disc before middle, a minute one behind it in third interspace 

 and another more lateral in middle ; a liigh jiostmediau tubercle from first to 

 fourth rows of punctures, followed by another which is nearly as high ; laterally 

 of these two there are four more, of which the posterior one alone is prominent ; 

 suture tesselated with black behind. Pygidium rounded, somewhat longer than 

 broad. 



Length, 61 mm. 



llab. Ribeirao Pires, Sao Paulo, November 1893 (Gouuelle). 



1 <J. 



28. Monocloeus spiniger spec. nov. 



(?. Similar to elnphriims, rostriuu white, with black mesial dot at base, 

 longitudinally depressed, a little broader than long, angulate above the antennal 

 groove. Prothorax shorter than in elaphrinus, carina nearer the middle, space 

 between the two black basal spots grey, a black apical half-ring, convex anteriorly, 

 interrupted in middle, followed laterally by a black spot, area limited by these spots 

 and carina ochraceous, centrally sliaded with grey. Scutellum greyish white. 

 Apical third of suture and the side and apex of the elytrum dotted with black, 

 the sutural dots more or less confluent ; subbasal tubercle high, divided, a smaller 



