204 THE ENTOMOLOGIST. 



Idliomyia sulcata, and Emjyis livida abounded. Several specimens 

 of the pretty Argyra lencocejjJiala and Pipunculus ater were taken, 

 as also two specimens of P. geniculatus ; of the latter species 

 Mr. Verrall is probably doubtful, as I find it in italics. Pipizdla 

 annulata, one specimen of which was captured. Dr. Meade says 

 rare ; Mr. Verrall places it with the reputed British. Several 

 specimens of Chilosia mstracea were taken, while SpluErophoria 

 scripta, S. menthastri, Xanthogramma ornatum, Volucella homhy- 

 lans, and V. p)ellucens were plentiful. I only found a single 

 specimen of each of Sericomyia horealis, Eristalis floreus, Helo- 

 philus pendulus, and Xylota segnis. Chrysotoxum arcuatum, C. 

 hicinctum, Sicus ferrugineus, Myopa huccata, and Oliviera lateralis 

 were all taken. Phorocera concinnata, Thelaira leucozona, and 

 Mydcea urhana were plentiful. Cordylura alhipes seemed scarce. 

 Two specimens of another of Mr. Verrall's reputed British 

 Diptera were taken in CUdogastra punctipes, Mg., a single speci- 

 men of the very beautiful Pteropoecila lamed, and several of 

 Pteropoectria afflicta and P. frondescentia were captured, as were 

 also Trypeta onotrophes, and Acidia cognata, which seemed com- 

 mon. The very pretty Trypeta florescentice was plentiful, while 

 three specimens of another rarity, Oxyphora {Tephritis, L.) 

 arniccB, Fin., were taken ; this is also reputed British by 

 Mr. Verrall. Sapromyza platycephala, Lw., and Chlorops hypo- 

 stigma, both of which species were taken, terminate the list of 

 Diptera, the two latter species being those I previously alluded to 

 as not appearing in Mr. Verrall's list. 



In Hemiptera some 17 species were taken, while Coleoptera 

 numbered 27 species, as also three of Orthoptera ; but as I may 

 have to give a future note on several so far undetermined species, 

 both of Ichneumonidge and Diptera, I purposely omit the names 

 now, as this paper is already longer than I had anticipated it 

 would be. I must, however, tender my best thanks to my friend 

 Mr. Edward Saunders for his kindly identification of the obscure 

 Hymenoptera, and also to Dr. Meade for his invaluable aid in 

 identifying some of the Diptera. 



NOTE ON SESIA SPHEGIFORMIS, Fabk. 

 By W. H. Tugwell. 



For many years past I have had the pleasure of studying this 

 interesting species in one of its most favoured habitats, viz.^ 

 Tilgate Forest, Sussex, and possibly a few notes may be useful 

 to others. 



The species is widely distributed over a fairly large area, 

 where its food-plant, alder, occurs ; it does not affect densely 



