Cerchysius Westwood 1832

Zuparko, Robert L., 2015, Annotated Checklist of California Encyrtidae (Hymenoptera), Zootaxa 4017 (1), pp. 1-126 : 18

Cerchysius Westwood 1832 [New state record]

Hosts. Diptera : Chamaemyiidae , Drosophilidae , Leucospidae

marilandicus Girault 1917e: 119 [New state record] (CAS, LACM, RLZC, UCDC)

Type. USNM

Distribution. N (Contra Costa, El Dorado, Lassen, Marin, Napa, Nevada, Plumas, Santa Clara, Sierra, Siskiyou, Solano, Stanislaus, Sutter, Tehama, Yolo)

Host/habitat. Unknown

Remarks. The name of the paper in which C. marilandicus was described was mistakenly recorded by Noyes (2001) as “Descriptions of miscellanous Chalcid-Flies from California”, but in fact the last two words are not present in the title. Of the 12 described species in this genus, only three ( laticeps Kerrich , subplanus (Dalman) and ugandensis Kerrich, all Palearctic taxa) have recorded hosts, all Diptera . However, there are two records in the literature of undescribed Cerchysius from Hemiptera : a Cerchysius species near laticeps was reared from a scale (“Coccid on wild plant”) in India (Shafee et al. 1975) (and not C. laticeps itself on a Pseudococcidae , as reported in Noyes & Hayat 1994 and Noyes 2001), and an undescribed species was reported as a hyperparasitoid on Coccus hesperidum via Microterys nietneri (as M. flavus ) in California, and associated with Saissetia oleae ( Timberlake 1913) . There is also a record of a Cerchysius sp. as a hyperparasitoid on Coelomera lanio Dalman , via Lydellothelaira collaris Townsend ( Diptera : Tachinidae ) ( Parker et al. 1953).

spp.

Remarks. An apparently undescribed species is represented by a series of three specimens from Stanislaus County (UCFC).