1	Elytron with four complete elytral striae (stria 1 may be abbreviated apically, but striae 2-4 are complete)	2
–	Elytron with fewer than four complete dorsal striae	4
2	Pygidium with dense ground punctation and coarse secondary punctation (Fig. 76B); outer subhumeral stria present in apical half	Operclipygus maesi sp. n.
–	Ground punctation of pygidium fine and sparse; secondary punctation varied; outer subhumeral stria absent	3
3	1st dorsal elytral stria at least weakened, usually obsolete in apical half; lateral submarginal pronotal stria obsolete basally	Operclipygus nicodemus sp. n.
–	1st dorsal stria complete to apex; lateral submarginal pronotal stria usually complete, may be interrupted at middle	Operclipygus chamelensis sp. n.
4	Pygidium with dense ground punctation, secondary punctation varied; marginal pygidial sulcus absent	5
–	Ground punctation of pygidium sparse; secondary punctation varied; marginal pygidial sulcus fine, often fragmented, usually present	11
5	Pygidium completely lacking secondary punctures (except possibly along extreme basal margin), with fine ground punctation only	6
–	Pygidium with secondary punctures, though they may be small and sparse	8
6	Central portion of frontal stria absent; lateral submarginal pronotal stria generally more or less complete along side (Fig. 76C); lateral pronotal punctures few, faint; 3rd dorsal stria interrupted	Operclipygus pacificus sp. n.
–	Central portion of frontal stria present as a detached fragment; lateral submarginal pronotal stria at least slightly abbreviated at base; other characters varied	7
7	Outer lateral stria of 1st abdominal ventrite extending behind metacoxa, passing through a distinct fovea behind the posterolateral coxal corner (Fig. 69E); apical margin of elytron with series of disconnected punctures (Fig. 69C); 3rd dorsal stria interrupted	Operclipygus punctissipygus sp. n.
–	Outer lateral stria of 1st abdominal ventrite not extending laterad behind metacoxa; postmetacoxal fovea situated behind inner corner of coxa, very small and inconspicuous; apical margin of elytron lacking punctures or marginal stria (Fig. 78C); 3rd dorsal stria usually complete	Operclipygus vorax sp. n.
8	1st abdominal ventrite with large fovea behind inner corner of metacoxa, with the lateral stria passing through it, bending behind coxa (Fig. 73F); basal fragment of 4th dorsal elytral stria generally present (Fig. 73E); 3rd, 4th and 5th stria represented by very short apical fragments; apical margin of elytron with crenulate stria (Fig. 73E)	Operclipygus foveiventris sp. n.
–	1st abdominal ventrite with small to inconspicuous fovea behind inner corner of metacoxa; other characters varied, but basal fragment of 4th stria and apical fragment of 5th stria often absent	9
9	Coarse punctures of propygidium dense, covering entire disk (Fig. 73G); secondary punctures of pygidium rather coarse; lateral pronotal punctures numerous, coarse (Fig. 73G); 3rd dorsal elytral stria frequently complete; basal fragment of 4th dorsal stria present	Operclipygus marginipennis sp. n.
–	Coarse punctures of propygidium markedly diminished in posterolateral corners, where dense ground punctation becomes conspicuous; secondary punctures of pygidium rather fine; 3rd dorsal elytral stria interrupted; basal fragment of 4th stria present or absent	10
10	Outer subhumeral stria generally represented by apical fragment; body often with faint metallic green tinge (Fig. 78A); apical margin of elytron with well impressed stria; basal fragment of 4th dorsal elytral stria usually absent	Operclipygus subviridis sp. n.
–	Outer subhumeral stria absent; body lacking any metallic tinge, piceous; other characters varied, but 4th stria usually represented by basal fragment	Operclipygus nitidus sp. n.
11	Anterior submarginal pronotal stria detached from lateral stria, recurved posterad	12
–	Submarginal pronotal stria continuous across anterior margin	13
12	Elytron with 4th dorsal stria more or less complete (may be weakened or narrowly interrupted at middle) and 3rd dorsal stria broadly interrupted (Fig. 69A)	Operclipygus impunctipennis (Hinton)
–	Elytron with 3rd dorsal stria complete, 4th variably complete to interrupted (Fig. 71E)	Operclipygus tripartitus sp. n.
13	4th dorsal elytral stria well impressed in about basal fourth	14
–	4th stria absent from basal half of elytron or at most represented by very small basal puncture (may be small apical fragment regardless)	15
14	Basal fragment of 4th dorsal stria more strongly impressed than fine, scratch-like 3rd, both interrupted at middle (Fig. 71F); 1st abdominal ventrite with large fovea posterolaterad metacoxa (see Fig. 73A)	Operclipygus latifoveatus sp. n.
–	3rd dorsal stria usually complete and always as or more strongly impressed than 4th (Fig. 73D); 1st abdominal ventrite with very small fovea behind inner corner of metacoxa	Operclipygus mangiferus sp. n.
15	Elytron with distinct apical marginal stria	16
–	Elytron lacking a distinct apical marginal stria; 1st abdominal ventrite with large fovea behind outer corner of metacoxa (Fig. 73A)	Operclipygus lissipygus sp. n.
16	Male metaventrite shallowly depressed and setose (Fig. 69G); pygidium lacking secondary punctures, with fine sparse ground punctation only (Fig. 69H); 1st abdominal ventrite with inconspicuous fovea behind inner corner of metacoxa	Operclipygus granulipectus sp. n.
–	Male metaventrite not depressed or setose, identical to that of female; pygidium with few secondary punctures; 1st abdominal ventrite with large fovea behind outer corner of metacoxa (Fig. 71B)	Operclipygus pauperculus sp. n.