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can be in (juestion as in addition to tliis species only two 

 other parasitic flies occur in Greenland namely Tachina larvarwn 

 L. and Echinomyia ænea Stæg. The larvæ of the first named 

 species are known (J. C. Nielsen: Iagttagelser over entopara- 

 sitiske Muscidelarver hos Arthropoder, Kbhvn. 1909, pag. 60) 

 and are different from the above described larvæ; the Echino- 

 myiæ are viviparous and the pupæ are two small to belong to 

 E. ænea. Further, Peteina skjlata was earlier reared from the 

 larvæ of Dasychira groenlandica (cf. J. C. Nielsen: The insects 

 of East Greenland pag. 394). c 



As the larva which I attributed at that time to 7. lar- 

 varum L. was misidentified, the above conclusion has turned 

 out to be wrong, and from a later examination of puparia 

 from which Peteina stylata B. & B. has emerged, it appears 

 that the Greenland larva does not belong to this species. 

 Kecently I have had the opportunity of investigating pupa- 

 ria, from which the Greenland Tachina has emerged, and 

 these puparia have shown that the larva described belongs 

 to this species. 



From an examination of some specimens of the Green- 

 land Tachina which I have sent to Dr. J. Ville neuve, 

 he succeeded in making out, that it was not T. larvarum. 

 L., but a closely related species, T. macrocera K. D. which 

 has been hitherto confounded with T. larvarum L. (cf. Kata- 

 log der paläarktischen Dipteren III, pag. 337). In a note 

 in Avhich Dr. Villeneuve^) publishes his discrimination 

 of the two species he mentions that T. macrocera R. D. is 

 viviparous. This however is due to a misconception. 



^) Dr. J. Villen euve: Sur Tachina macrocera K. D. (Dipt. Tachin.) 

 (Zeitschr. f. wiss. insektenbiologic VIII, 1912, pag. 296). 



