SCHEMATIZA. 501 



7. Schematiza clarki. (Tab. xxvm. fig. 11.) 



Black, opaque ; antenna? dilated in the middle ; thorax flavous at the sides ; elytra flattened and widened 

 posteriorly, the sides to the middle narrowly flavous. 



Var. Elytra obscure fulvous. 



Length 2-2f lines. 



Head black at the vertex, very finely rugose : clypeus testaceous ; antennae black, the third to the eighth 

 joints dilated, the third joint the longest ; thorax twice as broad as long, the sides straight, narrowed 

 towards the apex, the posterior margin sinuate at each side, the surface scarcely visibly rugose and finely 

 pubescent, the disc broadly black or dark fuscous, the sides narrowly flavous ; elytra widened posteriorly, 

 sculptured like the thorax and of the same colour, with a narrow flavous band (indented in the middle by 

 a projecting point of the ground-colour), which commences at the shoulders and narrowing gradually 

 becomes obsolete below the middle, the apices rounded ; underside and legs black. 



Bah. Panama, David in Chiriqui (Champion). 



S. clarki differs from S. antennalis, Clark, in the elytra being more dilated in shape 

 and wanting the posterior flavous spot, and in the entirely black legs. 



8. Schematiza thoracica. (Tab. XXVIII. fig. 12.) 



Dark fuscous, widened posteriorly ; thorax flavous, with two black bands ; elytra finely costate, fuscous, the 

 sides at the shoulders narrowly or broadly flavous. 



Var. a. The base of the head and the thorax fulvous, the latter with two black spots at the base. 



Var. b. Elytra entirely flavous. 



Length 2-2| lines. 



Head fuscous, with some more or less distinct small flavous spots at the sides ; clypeus flavous ; labrum piceous ; 

 antennae dilated from the third to the seventh joints, the third joint scarcely (if at all) longer than the 

 rest : thorax twice as broad as long, all the margins nearly straight, the surface longitudinally depressed 

 at the sides, flavous, finely pubescent, the disc with two narrow or broader longitudinal black bands ; 

 scutellum dark fuscous ; elytra widened posteriorly, each with three very narrow longitudinal costse placed 

 at equal distances but not extending to the apex, the surface minutely rugose and finely pubescent, the 

 shoulders occupied by a flavous band of variable width which gradually narrows towards the suture and 

 there becomes obsolete, the apices rounded and but slightly angular. 



Hob. Mexico, Cordova, Toxpam (Salle) ; Guatemala, San Juan in Vera Paz (Cham- 

 pion) ; Panama, Pena Blanca (Champion). 



8. thoracica differs from the species with costate elytra described by Clark in the 

 elytra being different in colour and each having three costae, and the thorax having two 

 black bands ; in some specimens the flavous portion of the elytra extends nearly to the 

 suture anteriorly, in others the shoulders only are narrowly marked with flavous. The 

 antennae differ in structure from those of S. clarki. The varieties do not differ except 

 in colour. 



9. Schematiza suturalis. (Tab. XXVIII. fig. 13.) 



Elongate, slightly widened behind, black ; the thorax narrowly fulvous at the sides ; elytra very finely punc- 

 tured, each with three raised longitudinal lines, pale fulvous, the suture narrowly and the apical margins 

 black. 



Length 2-2J lines. 



Head black, the clypeus flavous ; antennae with the third to the seventh joints broadly dilated, the four terminal 

 joints more elongate ; thorax one half broader than long, all the margins nearly straight, the sides nairowly 



