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 



