220 
Psyche 
[December 
of the metasternal processes, the modifications of the antennal 
club, and to a less extent the distance apart of the dorsal ab- 
dominal carinae, constitute the chief diagnostic characters used 
in the table following. Color is of no value whatever, all species 
probably varying from pale dull yellow to blackish with elytra 
of some shade of red or brown. Likewise the ordinary distinc- 
tions in size, form and sculpture are so slight as to be of little or 
no use in determining the species. 
Table of Species. 
1. Median pronotal fovea larger, spongiose pubescent., .valida. 
Median pronotal fovea small, nude 2 
2. Antennal club a little larger in the male, the last joint with 
an oblique tooth beneath near the base: dorsal abdo- 
minal carinse unusually approximate, being separated at 
base by only about one fifth the discal width of the seg- 
ment 3 
Antennal club in the male with last joint not toothed be- 
neath 4 
.3. Metasternal processes posterior in position, feebly develop- 
ed, consisting merely of obtusely rounded tumidities; 
ventral plate small, subquadrate truncaticornis . 
Metasternal processes long and acute, similarly posterior in 
position; ventral plate lacking, but in its place an obli- 
quely erect parallel sided laterally compressed process, 
its summit blunt obliquedens 
4. Antennal club in the male stouter and more cylindrical, the 
lower surface flattened and more or less asperate 5 
Antennal club not appreciably modified in the male 8 
5. Pronotum of male more angularly prominent at middle of 
hind margin; metasternal processes rather widely trun- 
cate at apex as viewed from the side conjuncta 
Pronotum much less prominent medially behind, the meta- 
sternal processes acute 6 
6. Metasternal processes more nearly median in position; ven- 
tral plate moderately transverse, less than twice as wide 
as long, truncate in front, and either subangulate or 
