124 fMay, 191(J. 



ADDITIONS AND COERECTIONS TO THE BRITISH LIST OF 

 MVSGIDM AGALYPTRATM. 



BY J. E. COLLIN, F.B.S. 



(Continued from page 48). 



HELOMYZID^. 



I am nmcli indebted to Abt. P. Leander Czeniy for confirmation and 

 correction of my identifications in this Family. 



Helomyza humilis, Mg-. — Col. Yerbury fovuid this species at Barmouth 

 (Merioneth) in May, 1902, and I have recently i-eceived a specimen from 

 Mr. Norman H. Joy bred from English truffles. 



Helomyza variegata, Lw., apparently does not occur in North Eiirope, and 

 Meigen made a mistake in restricting Fallen's name rufa to this species. 

 Loew's name must stand as has been pointed out by Czerny. 



Helomyza pectoralis, Lw. — Czerny has svmk this as a synonym of notata, 

 Mg., but Meigen's description does not apply to our species, which is, however, 

 certainly Zetterstedt's hilaris. If Czerny be correct oiir species is the var. 

 hilaris of notata, Mg. 



Helomyza lievifrons, Lw. — Czerny sinks this species as a synonym of rii/a. 

 Fin. {nee Panz.), and contends that Fallen's reference to Musca rufa, Panz., does 

 not affect the case, but I must agree with Loew that Fallen's name rufa cannot 

 be used at all. Fallen must have thought he was recognising Panzer's Musca 

 rufa and not describing a new species or he wovild not have used the name rufa, 

 and as he was certainly wrong in his identification there remained only one way 

 in which a subsequent student coiild use the name rufa. Fin., for a species of 

 Helomyza and that was by restricting it to a species (not previously dis- 

 tinguished) included in Fallen's concejDt ; Ijut what has actually taken place is 

 as follows : — The first student to deal with Helomyza rufa after Fallen was 

 Meigen who, in 1830, restricted the name to a species which does not occiu- in 

 N. Europe and consequently coidd not be included in Fallen's concept ; then 

 Zetterstedt in 1838 i-estricted Fallen's name to a species which he was unaware 

 had been described eight years previously by Meigen as flava ; again in 1847 

 Zetterstedt, recognising his previovis mistake, attempted to restrict Fallen's 

 name to another species, but this had also been described by Meigen seventeen 

 years before as affi.nis. Schiner followed Zetterstedt in using the name rufa. Fin., 

 for affinis, Mg., while Walker, Eondani, Bezzi and others have followed Meigen. 

 When Loew monographed the group there remained only one species of those 

 included in Fallen's concept of rufa undescribed, and by describing that as 

 Imvifrons Loew made it impossible for Fallen's name ever to be revived. 



Helomyza zetterstedtii, Lw., must be known in future under the name of 

 H. bicolor, Zett., as has been pointed out by Czerny. 



Helomyza montana, Lw., miist be known as H. fuscicornis, Zett. 



*Helomyza oxyphora,M.ik. — This species is closely allied to H. fuscicornis, Zett. 

 {montana, Lw.), but the scvitelkun terminates in a short bkmt protuberance 

 and the stout middle femora of the male are clothed beneath at the base with 

 a number of sliort black hairs. Col. Yerbury took two males at Golspie 

 (Sutherland) on August 2nd and 7th, 1900. 



