TYCHINI 273 



wide and rounded; eyes short and inconspicuous from above, but reniform and 

 conspicuous from a lateral view, composed of about 32 medium-sized facets. 

 Head with a strong median longitudinal carina bisecting cervicum, occiput and 

 vertex to a point opposite the anterior margin of the eyes. This posterior half of 

 the vertex evenly vaulted above the eye level. Anterior half of vertex rapidly, 

 evenly declivous to front and also medianly longitudinally carinate. Therefore, 

 only the median third of length is not carinated. Sides of head anterior of the 

 eyes convergent and erected into a conspicuous, suboblong crest or marginal 

 wing from anterior third of eye to apex of first antennal segment. This marginal 

 crest deeply, obliquely incised just posterior to antennal articulation, with a 

 small vertexal fovea just mesiad of the incisure. These vertexal foveae nude and 

 entirely free. Interantennal line conspicuously bicornuate each side as a conse- 

 quence of the extension of each lateral crest past the antennal articulation as a 

 rounded horn ; deeply arcuate between these frontal horns, with the median point 

 of arcuation sharply, narrowly incised (this median incisure just apical to origin 

 of anterior median carina) , and with a coarsely setose, acute spine on each side 

 of incisure. Front deeply and transversely recessed below these median spines. 

 Clypeus complex: produced into a transversely obconical elevation which has its 

 anterior face medianly elevated into a longitudinally lamelloid carina which 

 continues dorsally to end in a short median tooth of dorsal margin, this tooth 

 bearing a pair of divergent pencils of setae; a lateral tooth at each dorsal angle 

 of the clypear elevation so that this obconical process is dorsally tridentate. 

 Labrum simple, transverse, with concave apical margin. Ventral surface of head 

 simple, evenly flattened, without median longitudinal carina. 



Maxillary palpi four-segmented ; first segment minute ; second strongly ar- 

 cuate near base, elongate, basally pedunculate, gradually expanding to apex; 

 third short, one-third the length of second and slightly wider, subquadrate with 

 evenly convex external and angulate internal face; fourth large, one-fourth 

 longer than second, twice as wide as third, obliquely truncate at base, apically 

 becoming subconical and subsinuate with the apex minutely truncate and bear- 

 ing a small but distinct palpal cone. 



Antennae eleven-segmented, simple; segment I subcylindrical, as wide as 

 tenth; II ovoidal, shorter than first and as wide as ninth; III-VII small, monili- 

 form; VIII transversely moniliform, slightly wider; IX and X trapezoidal, pro- 

 gresively transverse; XI slightly wider than tenth, as long as distal segment of 

 maxillary palpus or slightly longer than preceding three segments united, basally 

 truncate, convergent in apical half to blunt apex. 



Pronotum one-fifth wider than long, widest through basal third, with a sub- 

 semicircular apical outline and then sides abruptly and angulately narrowed in 

 basal third, the sides subparallel basal to the constriction; transverse subbasal 

 sulcus in basal fourth connecting a lateral fovea each side, the foveae placed 

 beneath the overhang of the lateral margins. 



Each elytron with an entire sutural stria, two large basal foveae and the 

 posterior (apical) half of flank decorated with a strong, longitudinal, blackened 

 carina which continues the arc of the external carina of the first tergite. 



