April, 1910.] 77 



Pijrophaena granditarsa, Forst. — A ? at Twitclien, August 4th, 1909 

 Melanostoma melUnum, L. — A ? , Twitcheu, Aiigust 21st, 1909 ; M. scalare, 

 F., three J in August ; the ? abundant in September, it often flies amongst 

 herbage close to the gi-ound. The halteres (at all events of the ? ) are bright 

 emerald-green during life. 



Leucozona lucorum, L. — This pretty fly is rather common. May 18th — 

 AiTgust 18th. 



Ischyrosyrphus glaucius, L. — One at Twitchen, August 20th, 1907 ; a second, 

 on Angelica, August 14th, 1909 ; I. laternarius, Miill., a tj at Borough, Jiily 

 29th ; another at Twitchen, August 15th, 1909. The latter on Angelica. 



Catabomha pyrastri, L. — Rather common, July 23rd — August 25tli. 



Syiyhus albostriatus, Fin. — A S , Twitchen, Jiuie 2nd, 1909; S. grossularise, 

 Mg., very common, Jvuie 19th — September 9th ; S. rihesii, L., less common 

 than the last, Jvily 17th — September 29th ; S. vitripennis, Mg., common. May 29th 

 — September 17th ; S. corollse, F., two J s, one on Heracleum beside high road, 

 July 19th, the other at Twitchen, August 7th, 1909 ; S. hmiger, Mg., a S at 

 Borough, August 2nd, 1909 ; S. halteatus, Deg., very common, Jixly 23i'd — 

 September 29th ; two ? s taken at Twitchen September 21st, 1909, are small 

 and dark and very shiny, having a very dift'erent appearance from the ordinary 

 specimens, which were common at the same time and place ; one specimen in 

 the National Collection from South Devon comes near to them ; S. cinctellus, 

 Ztt., common, August 3rd — September 23rd ; S. auricolUs, Mg., four specimens, 

 July 7th — August 15th ; S. umhellatarum, F., three at Twitchen, August 19th — 

 September 17th ; 8. compositarum, Verr., two on A^igelica at Twitchen, 

 August 7th, 13th, 1909. 



Sphserophoria scripta, L. — Very common. May 31st — September 21st ; 

 S. mcnthastri, L., abundant. May 31st — August 13th, often flies close to the 

 ground. 



Xanthogramma ornatum, Mg. — A specimen taken by Dr. Dixey in Sandy 

 Lane, July 10th, 1907. 



Baccha ohscuripennis, Mg. — A specimen on a window in the house, August 

 26th, 1909, was at first mistaken for a solitary wasp. 



Rhingia campestris, Mg.— Abundant, May 28th — September 19th. 

 Volucella bomhylans, L. — Rather common, especially at Borough, July 3rd — 

 August 22nd ; the two forms (plumata and bombylans) mimic Bomhus terrestris 

 and lapidarius respectively so closely that I have taken the fly for the bee ; 

 V. inanis, L., of this rare fly Dr. Dixey took a specimen in Sandy Lane, August 

 IGth, 1907 ; V. inflata, F., one at Twitchen, July 18th, 1908, another at Borough 

 on flowers of (Enanthe crocata, Jvily 23rd, 1909 ; V.pellucens, L., one at Borovigh, 

 July 24th, 1906. 



Eristalis tenax, L., abmidant ; E. intricarius, L., one at Twitchen, September 



12th, 1907 ; E. arbustorum, L., both forms common. May, July — September ; 



E. horticolaj Deg., scarcely common. May, Jvily 18th — September 22rd. 



Helophilus pendulus, L. — This handsome fly was very common in one fleld 



at Twitchen, August 19th — September 12th, 1907 ; a single specimen September 



18th, 1909. 



G 



