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 A HISTORY OF CORNWALL Liskeard ; Penzance, CYCLORRHAPHA (continued) PROBOSC1DEA (continued) SYRPHIDAE (continued) Volucella inanis, L. Two were found in Bishop's Wood, Truro, by Tate, 26 July 1902, but none have been found since that date in spite of careful searching mflata, F. Cornwall (V.) ; Mount Edgcumbe (A) pellucens, L. Common about Millook, Launceslon, Liskeard, Looe, Truro; College Wood, Penryn ; Penzance (V.) Eristalis sepulchralis, L. W. Cornwall (D.) aeneus, Scop. PaJstow (L.) ; one specimen on mesembryanthemums at Tresco, Stilly (Y.) cryptarum, F. Loot (A.) tenax, L. Evidently generally distributed through- out the county and at Stilly - intricarius, L. Liskeard ; Looe; Padstow; Truro; Newquay ; Penzance ; Stilly (Y.) arbustorum, L. E. Cornwall (M.) Bodmin; Padstow (L.) ; Truro (T.) nemorum, L. Launceston; Padstow (L.) ; Fal- mouth ; St. Martin's, Stilly (Y.) pertinax, Scop. Botus-Fleming ; Saltash ; Double- bois; Padstow (L.) ; Truro (T.) horticola, Deg. Millook; Launceston; Trebartha ; Liskeard; Padstow (L.) ; Truro (T.) ; Falmouth; Penzance (V.) Myiatropa florea, L. Launceston; E. Cornwall (M ) Doublebois ; common about Truro (T.) and Falmouth ; Penzance (V.) ; W. Cornwall Helophilus trivittatus, F. Padstow (L.) ; Truro (T.). Though generally regarded as a coast species Tate found his two Truro specimens in a marsh beyond Bishop's Wood hybridus, Lw. Tate found two typical examples of this beautiful fly at ragwort by the marsh beyond Bishop's Wood, Truro pendulus, L. PaJstow (L) ; Truro (T.) versicolor, F. Cornwall (V.) ; Budock Bottoms, Falmouth lunulatus, Mg. Cornwall (V.) ; Land's End (Baily) transfugus, L. Cornwall (V.) ; Marazion and Land's End (Baily) lineatus, F. E. Cornwall (M.) ; Looe (A.) ; Lis- keard; Swanpool, Falmouth Merodon equestris, F. Though evidently a recent importation to Cornwall, this fly has unfor- tunately established itself in many parts of the county and in the larval stage causes at times a great deal of damage to narcissus bulbs, more especially by eating its way through them from the base upwards. In 1 896 it seriously injured the narcissus beds of the flower-growers in W. Cornwall, and seems now to spread through- out the whole county from the Tamar to the Isles of Stilly wherever daffodil bulbs are grown in quantity. In 1 897 the fly was reported by Marshall to be plentiful in his garden at Botus- Fleming. The following year several of the Penryn growers suffered severely from its attack. Injured bulbs have during the past seven years been sent in from all the important growing districts and from many gardens in the north, east, and south of the county as well CYCLORRHAPHA (continued) PROBOSCIDEA (continued) SYRPHIDAE (continued) Cnorrhina berberina, F. Cornwall (V.) ; Botus- Fleming, June 1897 (M.) oxyacanthae, Mg. Occurs occasionally at haw- thorn in Bishop's Wood, Truro (T.) ; W. Cm- wall (D) floccosa, Mg. Cornwall (V.) ; Carnanton Woods, Mazugan-in-Pyder (L.) ; common on hawthorn, Bishop's Wood, Truro asilica, Fin. Occasionally taken about Penzance Xylota segnis, L. On undergrowth in the Cascade Wood, Trebartha, 6 September, 1902 ; Double- bois ; very common about Truro (T.) ; Fal- mouth and Matt-nan ; W. Cornwall (D.) lenta, Mg. E. Cornwall (M.) ; Loot (A.) sylvarum, L. Launceston; plentiful near Tre- villis, Liskeard, 22 July, 1904 ; Doublebois Syritta pipiens, L. Millook; abundant about Laun- ceston, 1 6 September, 1904; common at Lis- keard, 2 May, 1905 ; Bodmin; Padstow (L.) ; common at Trun (T.) and Falmouth; W. Cornwall (D.) Eumerus sabulonum, Fin. One male at Penzance, 7 July, 1871 (V.) ornatus, Mg. Paul, Penzance (Baily) strigatus, Fin. PaJstow (L.) ; St. Ives ; Penzance (V .) Chrysochlamys cuprea, Scop. A single specimen taken by Tate on the trunk of a tree in the Grammar School garden, Truro, in May 1904, and another caught on the same tree-trunk a year later Arctophila mussitans, F. Tate has taken altogether about a dozen on a patch of Scabious on Kenwyn Hill, Truro ; W. Cornwall (D.) Sericomyia borealis, Fin. Common above Trebartha, 29 August, 1902 ; plentiful about Truro (T.) ; W. Cornwall (D.) Chrysotoxum cautum, Harr. One taken by Tate in Bosvigo Wood, Truro octomaculatum, Curt. A single example taken by Tate near Penwethers elegans, Lw. Padstow (L.) festivum, L. Padstow (L.) vernale, Lw. A male taken at Penzance 1 3 July, 1871, named by Loew himself (V.) bicinctum, L. Padstow (L.) Microdon mutabilis, L. Liskeard, 16 June, 1904 CONOPIDAE Conops flavipes, L. Looe (A.) ; Tate says Conops is common at Bishop's Wood, Truro, but the species has not been determined Physocephala rufipes, F. Looe (A.) ; Padstow (L.) ; Bishop's Wood, Truro (T.) ; W. Cornwall (D.) Oncomyia atra, F. Padstow (L.) ; W. Cornwall (D.) Sicus ferrugineus, L. Bishop's Wood, Truro (T.) ; W. Cornwall (D.) Myopa buccata, L. Padstow (L.) testacea, L. E. Cornwall (M.) ; Looe (A.) OESTRIDAE Gastrophilus equi, F. The Horse Bot Fly. The fly though seldom caught is undoubtedly com- mon in the county, and horses that live much in the open and receive little grooming suffer much from its attacks 234