( 2G7 ) 



convex and again concave, lateral!}' convex again before being flexed forward in 

 an obtuse angle, extending beyond middle of side ; base bisinnate. Elytra strongly 

 tuberculate, with i)arallel sides, more than half as long again as broad, third 

 interspace with three large tubercles, besides a small subapical one, first the 

 largest, fifth interspace with four rather prominent tubercles, interspaces 7 and 9 

 pustulate. Pygidium semicircular. 



Length, s mm. 



Hal. Mexico (ex coll. Boucard). 



1 ?. 



51. Nemotrichus vitticoUis spec. nov. 



? . Rufescent brown ; pubescence of upperside grey, variegated with brown. 

 Middle of occiput brownish. Proiiotum with a brown mesial vitta which is con- 

 stricted in middle, and is divided at apex and in middle by a thin grey mesial 

 line ; sides sparsely dotted with brown. On elytra an irregular median sutural 

 patch, including grey dots and connected with a lateral antemediau spot by means 

 of some dispersed dots, an elongate spot on subbasal convexity prolonged to basal 

 margin, a postmedian lateral spot and numerous small sports in apical area, as 

 well as a number of dots behind shoulder, all brown. Pygidium with brown lateral 

 sjjot. Underside of body unicolorous, excepting a brown dot on metasternal 

 episternum. Apical half of tibiae brown. 



Club of antenna very slender, segment 'J about three times as long as broad, 

 11 very pale. Prothorax nearly twice as broad as long, slightly depressed before 

 dorsal carina, which is feebly biconvex ; lateral carina short, not reaching middle. 

 Elytra coarsely punctate-striate, the interspaces convex. Pygidium rounded- 

 triangular. Sterna without large punctures. Mesosternal process evenly rounded, 

 not tuberculiform, triangular, with the apex rounded. 



Length, 51 mm. 



Ilab. Cayenne. 



1 ?. 



52. Nemotrichus armatus spec. nov. 



<S. Brown. Eye edged with luteous grey. Segment 11 and apex of lU of 

 antenna pale luteous. Pronotum sparsely pubescent clay, a distinct mesial vitta 

 more denseh- pubescent grey, interrupted in middle, sides also densely gre}', a lateral 

 spot in front of dorsal carina produced forward. Elytra pubescent clay ; a patch 

 before middle and another before declivous apex grey, situated between suture 

 and tifth interspace, the first not reaching suture, in front of each jjatch a black 

 angle-shaped mark, the first produced forward ; a grey spot at lateral edge before 

 and another behind middle, each bordered by a brown spot in front and behind ; 

 some brown spots behind the grey dorsal patches. Pygidium with brown spot 

 at side. Apex of tibiae brown ; base of tibiae and the tarsi rufous, second and 

 third segments slightly darker. 



Frons broader than the eye is high in frontal view ; antenna reaching beyond 

 base of elytra ; segment 9 very little longer than 8, half as long again as 10. 

 Prothorax conical, lateral carina not reaching middle, dorsal carina almost straight, 

 feebly concave. Elytra straight at basal margin, coarsely punctate-striate, third 

 intersimce subcostate behind. Pygidium rounded-triangular. Sterna punctured 



