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<i>Ooencyrtus lucidus</i> Triapitsyn & Ganjisaffar (Hymenoptera: Encyrtidae) was recently recovered from fresh sentinel eggs of <i>Bagrada hilaris</i> (Burmeister) (Hemiptera: Pentatomidae) in California. In the present study, life history traits of <i>O. lucidus</i> were studied at <inline-formula> <math display="inline"> <semantics> <mrow> <mn>26</mn> <mo>±</mo> <mn>0</mn> <mo>.</mo> <mn>5</mn> </mrow> </semantics> </math> </inline-formula><inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mo>∘</mo> </msup> </semantics> </math> </inline-formula>C, <inline-formula> <math display="inline"> <semantics> <mrow> <mn>40</mn> <mo>±</mo> <mn>10</mn> </mrow> </semantics> </math> </inline-formula>% RH, and a photoperiod of 14 L: 10 D hours. Results showed that 95.2% of the parasitized eggs yielded successful emergence of adults. The total immature developmental time was 14.27 and 13.95 days for females and males, respectively. The sex ratio of <i>O. lucidus</i> was 0.5 (females/offspring). Mated females laid on average 6.0 eggs per day and 222.7 eggs during their mean ovipositional period of 37.3 days. There was no significant difference in reproduction parameters between mated and non-mated females. The net reproductive rate (<inline-formula> <math display="inline"> <semantics> <msub> <mi>R</mi> <mn>0</mn> </msub> </semantics> </math> </inline-formula>) was 103.8 females/female/generation, the intrinsic rate of increase (<inline-formula> <math display="inline"> <semantics> <msub> <mi>r</mi> <mi>m</mi> </msub> </semantics> </math> </inline-formula>) was 0.171 females/female/day, the finite rate of increase (<inline-formula> <math display="inline"> <semantics> <mi>λ</mi> </semantics> </math> </inline-formula>) was 1.187 population multiplication/day, the mean generation time (<i>T</i>) was 27.1 days, and the doubling time (<i>DT</i>) was 4.0 days. The highest longevity was observed in mated and non-mated females fed with honey, and they lived for 70.8 and 70.1 days, respectively. Providing females with host eggs in addition to honey, reduced their longevity by 24% in mated and 28% in non-mated individuals. Non-mated females and males deprived of honey only lived for 3.5 and 2.5 days after emergence, respectively. Our results indicate that <i>O. lucidus</i> has sufficient life history traits to make it a promising egg parasitoid for the biological control of <i>B. hilaris</i>.