n6 MEMOIRS ON THE COLEOPTERA 



edge of the pronotum, at least in some parts of this tribe. Again, 

 the basal joint of the hind tarsi, which are at least moderately 

 long in both sexes, is shorter in the female than in the male, some- 

 times, as in lucida, but slightly and scarcely differing in form from 

 the succeeding joints, but occasionally notably shorter and more 

 triangular, with the outer angle somewhat produced and acute, a 

 character to be considered in noting the diagnosis of Aspidolea, as 

 given by Bates and quoted in the above table. The mandibles 

 and mentum are very much as in Mononidia, but the mentum is 

 flatter and less punctate to impunctate and the mandibles, though 

 tumid beneath, are apt to be more or less prominent externally at 

 the obtuse apex, though not everted as they generally are in Cyclo- 

 cephala and Aclinidia. The antennal club is notably small in 

 both sexes as a rule and never so long as the preceding seven joints 

 combined, except in atricapilla, an aberrant type in the genus 

 and having stouter mandibles, where it becomes much longer. 

 The species in my collection may be known as follows: 



Elytral suture dark in color, generally dilated at the middle and behind 

 the scutellum; pronotum impunctate and bivittate with black. . . .2 



Elytral suture pale in color or so in great part 7 



2 Base of the pronotum with a thick entire bead as in Augoderia 3 



Base without trace of marginal beading 6 



3 Median black dilatation greatly expanded, forming a large spot almost 

 confluent with the large basal black area and extending to outer 

 third of the elytra; sculpture of the latter strong. Body stout, 

 oblong, convex, shining, glabrous above and on the pygidium, the 

 sterna with some short fulvous pubescence laterally; head rather 

 more than half as wide as the prothorax, blackish, smooth and dull 

 throughout, impunctate, except sparsely and finely toward the sides 

 and about the apical parts of the large clypeus, which is as long as 

 the entire head behind it, three-fourths wider than long, the sides 

 parallel and straight in basal half, then gradually rounded, becoming 

 subrectilinearly oblique to the broadly rounded angles, the feebly 

 sinuate part of the apex not quite half as wide as the base, the 

 margins finely beaded throughout, very feebly and gradually reflexed 

 at apex, the surface nearly flat, the suture extremely fine and feeble; 

 prothorax four-fifths wider than long, the sides broadly, evenly 

 rounded, more converging apically than basally, the apical angles 

 acute and sharp, the basal rounded; black vittae broad, bisinuate 

 externally, expanded greatly at apex and base, coalescent apically 

 and attaining the hind angles at base, the sublateral black spot 

 distinct; bead black and entire throughout; scutellum rufous, in- 

 fuscate at ^he margins, almost sculptureless; elytra a fourth longer 

 than wide, a little wider than the prothorax, the series coarsely im- 



