IO2 MEMOIRS ON THE COLEOPTERA 



densely punctate except basally, the suture only visible laterally; 

 color flavate, broadly metallic black laterally but not on the clypeus; 

 prothorax strongly, evenly convex, not twice as wide as long, with 

 feebly rounded, somewhat post-medially subprominent sides and 

 very broadly lobed base, the bead wholly wanting at base but almost 

 entire at apex, thick and convex at the sides; apical angles rather 

 sharp, the basal somewhat obtuse though only blunt at tip; surface 

 impunctate, very even and sculpturelefs, metallic-black, flavate at 

 base, except medially, also broadly at the sides, there inclosing an 

 elongate black spot, also with three flavate apical spots, the medial 

 prolonged and vittiform, the lateral triangular, also with two oblique 

 linear discal pale spots converging toward the middle basally; 

 scutellum but very slightly longer than wide, narrowly parabolic, 

 smooth and pale, with black margins; elytra but little longer than 

 wide, a fifth wider than the prothorax, strongly rounded behind, 

 polished and without sculpture, the female with a short oblique 

 ridge at each side angulating the edge, wanting in the male, flavate 

 in color, the suture and three posterior vittae black, the external 

 more oblique and joining the others posteriorly, the vittae generally 

 anteriorly prolonged in finer lines but never to the base; humeral 

 region with some irregular black markings; pygidium smooth (cf ) 

 or with a few scratches laterally ( 9 ), piceous, pale at the sides in the 

 latter but with only two apical pale spots in the former sex; under 

 surface sharply variegated with flavate and black. Length (cf 9 ) 

 13.8-16.0 mm.; width 7.8-9.2 mm. Southern Florida. 



formosa Burm. 



To describe the maculation in any way completely, would require 

 a large amount of verbiage; it is a rather common species in Cuba 

 and Haiti and is apparently not uncommon also in Florida. 



Polymcechus Lee. 



The Parastasiids, of which Polymcechus may be considered an 

 aberrant member and the only one known from the American con- 

 tinents, are altogether one of the most anomalous of the smaller 

 divisions in this part of the Scarabseidae, having affinities in several 

 external directions, as for instance toward the Dynastinse in the 

 case of Polymcechus. In fact the Parastasiids do not hold together 

 among themselves at all well, the habitus of Parastasia, Peperonota 

 and Polymcechus being notably divergent, to such a degree that 

 even Lacordaire himself, in a letter written to LeConte and 

 quoted by the latter under his original description, declares 

 unconditionally that Polymcechus can be nothing else than a 

 Dynastid. Cnemida, included by Lacordaire in the group, is 

 not alluded to by Dr. Ohaus in his interesting review of the 



