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 A HISTORY OF SUFFOLK S. caudatus at Aldeburgh, Needham, and Claydon ; S. florkola at Southwold, and 5. obscurellus, which was taken by Tuck at Aldeburgh in September 1899. In 1906 I paid some little attention to the Microgasterides, so beneficial in destroying the white butterfly caterpillars on cabbages."* In the extensive genus Apanteles, I have swept A. ferrugineus zX. Barton Mills and in Tuddenham Fen ; taken A. limbatus about Ipswich in 1893 ; seen A. glomeratus everywhere on Purls rapae and hrassicae ; received A. spurius from Flatten at Ipswich ; captured A. geryonis in the Bentley Woods ; instanced A. zygaenarun from Felixstowe and Brandon ; bred ten A. caiae from Chelonia caia at Ipswich ; received A. nothus from Roths- child, who bred them from Antklea sinuata, at Tuddenham ; and eleven A. difficilis from Tuck» who bred them at Bury St. Edmunds ; A.falcatus occurs in Barnby Broad in August ; A. decorus in the Bentley Woods and Benacre Broad ; A. obscurus at Oulton Broad and Brandon ; A. coniferat in the Walberswick salt-marshes ; A. fuUginosus at Claydon on Angelica flowers in August ; A. astrarches at Lakenheath and the Bentley Woods ; A. bicolor in the Southwold salt-marshes in August; and the common A.fuhipes at Wortham, Tuddenham Fen, Barton Mills, and Stanstead Wood in June. The allied genus MicropHtis is not so well represented by M. spinolae at South- wold in Auf;ust ; M. tristis, which Tuck has bred here from Diathecia cucubali ; M, dolens on Angelica flowers at Claydon in 1899 ; M. spectabilis, a common species about Ipswich ; M. mediana at Claydon, late in September ; and M. tuberculifera at Ipswich and the Bentley Woods. The typical genus Microgaster is treated of in the Entomologist for 1906, and mention is made of M. alvearius at Ipswich ; M. connexus at Bungay ; M. tiro at Henstead in August ; M. suffhlciensisy Mori., from such distant places as Bury St. Edmunds and Locarno, though in both it was bred from Nothris verbascella ; M. suhcompletus has occurred at Alderton in September ; M. sticticus at Tostock and Barnby Broad ; and both AI. globatus and M. tibialis are very common. The review of the section Areolarii is completed in the Entomologist, 1907, p. 217, where I have instanced the capture of a new British species, Microdus nugax, on meadow-sweet flowers at Foxhall in August 1 902 } M. clausthalianus at Barton Mills in June ; and M. tumidulus at Foxhall and Claydon Bridge. Earinus nitidulus has been swept in Tuddenham Fen and E. gloriatorius beaten from birch-bushes in the Bentley Woods in May ; Orgilus obscurator occurs in Tuddenham Fen and the Bentley Woods ; and I have described a species new to science, O. micropterus, which was first taken on the flowers of Angelica at Foxhall on 12 September 1898. This brings us to the confusing Polymorph!, among which the Euphorides are here repre- sented by Euphorus pallidipes and E. picipes, both common in May, the former at Stanstead, Belstead, Brockdish (Norf.), Brandon and Barton Mills, and the latter in Tuddenham Fen. Microctonus splendidus has turned up at Southwold in August, and Perilitus rutilus is common among turnips at Ipswich and Monk Soham. Meteorus albiditarsis has been taken by Elliott in the Bentley Woods ;. I have beaten M. caligatus from plum at Barham in May ; M. chrysophthalmus at Freston early in September ; Mr. Sparke has found M. deceptor at Tuddenham Fen ; M. pallidipes is common at Wherstead, Assington, and Monk Soham ; M. obfuscatus is common about Boleti on elms, since it preys upon the larvae of beetles feeding therein ; M. atrator has occurred on the windows of Monk Soham House, with M. scutellator, in August ; M. rubens has been found by Mr. PifFard on the Felix- stowe sandhills, and M. fragilis is common at Tuddenham, Halesworth, Needham, and Moulton ; M, punctiventris occurs at Southwold ,■ M.filator was once found ovipositing in a dead rabbit in the Bentley Woods ; and M. pulchricornis is common about Ipswich. Blacus armatulus is not rare in bracken refuse in the Bentley Woods, together with B. ruficornis ; " and I have found B. humilis at Claydon Bridge.^ Curtis -' records the beautiful Proterops nigripennis, Wesm., under the name Bracon denigrator, Linn., as having been taken by the Rev. William Kirby, probably at Barham; and in the Entomologists' Monthly Magaxine, 1900, p. 1 74, I have confirmed Helcon annulicornis as a British insect on the strength of an example captured in Brantham Dale, apparently in search of some ivy-feeding beetle. Macrocentrus marginator is a very common kind on flowers and reeds at Lowestoft, Brandon, Monk Soham, Southwold, and Herringswell ; M. thoracicus occurs at Ipswich and in Assington Thicks ;. M. ahdominalis is abundant throughout the county ; M. infirmus has been noted at Monk Soham^ Southwold, Aldeburgh, and Barton Mills ; and M. coUaris under plants of Erodium cicutarium at Brandon in August. Diospilus oleraceus is common at Assington, Bentley, Tostock, and Monk Soham ; and Pygostolus sticticus not rare at Brandon in June. The rare and very aberrant Pachylomma buccata was found on my study window at Monk Soham early in July 1905 ; but the Aphidiides are very poorly represented by Aphidius cardui on fennel flowers on the Felixstowe clifl^, A. granarius bred at Monk Soham from Siphonophora sonchi in 1907, A. avenae and A. pini in the Bentley Woods, where also Ephedras lacertosus has appeared ; besides these only Trioxys aceris can be named, though a great many species which I have recently bred from aphides in my garden " Brit. Ent. Ixix. 118
 * Cf. Entom. 1906, pp. 99-105. * Cf. Ent. Mo. Mag. 1900, p. 288 ; 1901, p. 17.