Clytiomya continua and other important new Diptera: Tachinidae records suitable food plants were present. Eurydema dominulus is a Nationally Scarce species with a strongly southern distribution not recorded from Essex, forming highly localised colonies on Crucifers, particularly cuckoo-flower Cardamine pratensis. Freraea gagatea (albipennis) is a Nationally Rare (RDB3) species whose status has been revised from Vulnerable in Shirt (1987). It has previously been recorded from Wilts. Berks. Suffolk and Perthshire. The larvae are parasitoids of adult ground beetles, in Britain Harpalus tardus and in Europe Harpalus rufipes and Curtonotus (Amara) aulicus (Belshaw 1993). Several larvae may develop in a single host. The fly has been recorded in heathland and grassland. Two individuals were collected by the first author new to Essex at the Former Royal Ordnance Site (Area C: TQ377988) in the Lee Valley (see paper in section 3 of this journal). One was collected in pan traps set between 16th June and 4th July 2003 and the second was swept on 18th August 2003, both in an old flower-rich grassland area with remnant post-industrial foundations. Litophasia hyalipennis was recorded in 1887 from Sussex (Bclshaw 1993), but believed to be extinct until rediscovered at Northfleet in Kent in 1987 (Clemons 1992). It is listed in the Red Data Book and Falk (1991) as an Appendix species. In 1996 the species was recorded at Chafford Hundred in South Essex (O'Toole & Ismay 1997) where most of the sites and habitats have now been destroyed by housing development. The first author has collected it at further south Essex locations at Aveley Bay (TQ5379), one male in traps between 6th and 21st July 2000 and at former sand/gravel workings (where the habitat is now destroyed by restoration) in the nearby Ingrebourne Valley (TQ5283), one male was collected on 22nd July 2002. Phasia barbifrons was exhibited at the 1999 annual meeting of the Dipterists Forum by Laurence Clemons who found it new to Britain at a pasture site in Kent in June 1999. It is another phasiinc tachinid fly presumed to parasitise Heteroptera. Its build and appearance resemble the common species P. pusilla with which it may have been confused in the field (Clemons 2001). Males and females of the species were swept by the first author off Carrot flowers and herbage at the Former Royal Ordnance Site in the Lee Valley (Areas B, C and D: TQ3798, TQ3 80989, TQ377988) new to Essex on 18th July, 4th August and 18th August 2003. He also collected a male and females at Queens Park, Billericay (TQ6796) on 5th August 2003 and a male and female at Sandon Pits on 22nd August 2003. Phasia hemiptera is large phasiine fly (see Plate) that develops inside shield bugs, in Europe with single records from two British species Palomena prasina and Pentatoma rufipes. Both shield bugs arc not uncommon in the county. Palomena prasina occurs in meadows, the margins of heaths, woodland clearings and parks. Pentatoma rufipes is commonly found in woodlands, and oak is a major host (Southwood & Leston 1959). In England Phasia hemiptera is found in woodland margins and old meadows (Belshaw 1993). There are records from only four previous localities in Essex, all in the west of the county. Several recent records nationally are detailed in Merrifield & Merrifield (2000) and Jones (2000). The first author collected a single male from Angelica flowers in Queens Park, Billericay (TQ6796) on 5th August 2003. Subclytia rotundiventris is listed as Nationally Rare (RDB3) in Falk (1991). The unpublished JNCC Calyptcratc Review states that it has been recorded in southern and central England, with an increase in recent years and well over a dozen post-1960 localities. This may only reflect an increase in recording, and this is still a highly restricted species. It occurs in broadleaved woodland, including birch scrub in areas of wet heath and fen, heaths and calcareous grassland. The larvae are parasitoids of several species of shieldbug including species associated with Birch. Juniper and Gorse such as Elasmostethus interstinctus, Elasmucha grisea and Piezodorus lituratus. The first author collected three specimens in 2003 new to Essex at the Former Royal Essex Naturalist (New Series) 21 (2004) 53