292 [December, 



Corsica lias often forced itself on my attention, and remains un- 

 accountable, considering the great abundance of other insects. The 

 role of these parasites seems to be transferred in a great measure to 

 the Diptera {Tacliinidce), which show themselves evei'ywhere in un- 

 usual numbers. 



Villa dclla Croce, Ajaccio : 



August 21171, 1901. 



FURTHER NOTES ON THE GENUS HETEROMYZA, Fln. 

 BY J. £. COLLIN, F.E.S. 



Herr P. L. Czernj^ of Badhall, Ober-ffisterreich, informs me in a 

 recent letter that he has seen the type of Zetterstedt's Anthomyza 

 rotundicornis, which, though a true Heteromyza, is not the same as my 

 species of that name (Ent. Mo. Mag , 1901, p. 110) ; he states that 

 it has the face very narrow, being even narrower than in my figure 

 of H. atricornis, in which character it agrees with the two British 

 males I described, but he does not say if the front facets of the eyes 

 are dilated in Zetterstedt's species. 



Zetterstedt's A. rotiondicornis is therefore more probably my H. 

 atricornis, and his description bears this out, for though he says, 

 '^ JFro77s * * toia Jiilvrr," a line before he says, " Orhifee angustce, 

 alhcd^'' and his remark, ''^ Epistomn * * nee infra oculos descendens ; 

 sub antennis angustissimum,'''' applies better to S. atricornis than to 

 my second species. 



Meade's P. rotundicornis was described from specimens in Dale's 

 collection, and specimens sent by Dale to Verrall were the same as 

 my H. rotundicornis, which stood in the Verrall collection under the 

 name H. atricornis, Mg. 



I cannot accept the wnm^ fil if ormis, Dsv., for my species, as one 

 of Desvoidy's characters for his genus Thelida (type Jiliformis) was 

 the narrowed face, and therefore his species was more probably H. 

 atricornis. I very much doubt now if either of Macquart's species, 

 H. cinerella and H. scutellata, belong to this genus at all, as probably 

 one of them represents Tephroclilamijs rufiventris, a species which he 

 must have known, and at any rate his S. cinerella, described as 

 " Semblable a V atricornis. Abdomen d'un noir ui] pen grisatre ; bord 

 posterieur des segmens et anus fauves (^ ? ," can hardly be my H. ro- 

 tundicornis. It appears to me therefore that a new name is necessary 

 for the species which I have called H. rotundicornis, and which has 



