Trichomasthus Thomson 1876

Hosts. Hemiptera: Eriococcidae

coeruleus Mercet 1923: 49

Type. MNMS

Distribution. E (Alameda, San Joaquin)

Host/habitat. Eriococcus spurius

Remarks. In 1939 and 1949–50 a species then identified as T. cyanifrons was imported from Europe and released in southern California in a biocontrol program against E. spurius, but failed to establish (Flanders 1952; Bartlett 1978b, cited by Noyes 2010). However, subsequent importations of a species initially identified as T. cyanifrons in 1952–1954 in central and northern California did result in establishment—this imported agent was later determined to be T. coeruleus (Dreistadt & Hagen 1994) . Noyes (2001) lists two hosts for this species—both of which are invalid names for E. spurius .

spp.

Remarks. Specimens representing four additional morphospecies were collected from Alameda, Contra Costa, Imperial, Lassen, Marin, Orange and Tuolumne counties (RLZC, UCDC, UCFC, UCRC).