Annotated Checklist of California Encyrtidae (Hymenoptera) Author Zuparko, Robert L. text Zootaxa 2015 4017 1 1 126 journal article 10.11646/zootaxa.4017.1.1 086efdb4-44cf-4c0b-a796-1eb81f2cdd24 1175-5326 245475 BBFC3D93-6A7E-4862-84EF-021ADE2F4B3A Comperia Gomes 1942 Hosts. Blattodea : Blattellidae merceti ( Compere 1938: 317 ) ( Dicarnosis ) Type . BMNH Distribution. E (Alameda, Contra Costa, Riverside, Sacramento, San Diego, Stanislaus, Yolo) Host/habitat. Supella longipalpa , Supella supellectilium Remarks. This appears to be a tropical species that has become adventitiously established around the world. This species was imported into California using Hawaiian stock in a biocontrol programs against cockroaches in the late 1970s and was reported established ( Slater et al. 1981 ). However, there is a single specimen from Contra Costa County (EMEC) collected in 1957, indicating the species was probably already present in the state. Gomes (1942) reported Blattella germanica as a host, but Roth and Willis (1960) noted that this was not based on rearing records. Lawson (1954) reported that C . merceti was unable to attack Blatta orientalis and Periplaneta americana ootheca, but a single specimen (UCRC) was reportedly reared from a Periplaneta sp.