﻿A correction concerning Tachina 



larvarum L. to „Iagttagelser over entoparsi- 



tiske Muscidelarver hos Arthropoder". 



By J. C. Nielsen. 



Some years ago I found a large parasitic maggot in the 

 caterpillars of Spilosoma lubricipeda L., and from thes^ 

 caterpillars I reared Tachina larvarum L. In «Iagttagelser 

 over entoparasitiske Muscidelarver hos Arthropoder« ^) the 

 second and third stages of the said maggot and the pupa- 

 rium were subsequently described under the name of 7, 

 larvarum L. On account of the doubts which J. Pant el 

 in »Recherches sur les diptéres å larves entomobies« 2) and 

 C. T. Town s end in letters to me has pronounced with 

 respect to the correct determination of the parasite, 1 have 

 repeated the investigation with the 5p«7oÄO/wa- caterpillars 

 and from these investigations I have found that the cater- 

 pillars were infested with maggots both of T. larvarum L. 

 and of another Tachinid fly, Ernestia radicum F., to which 

 the maggots described and the puparium belong. 



On account of my misinterpretation of the Ernestia- 

 larva I attributed ^) a Tachinid maggot which lives parasitic 

 in the caterpillars of the Greenland moth Dasijchira groen- 

 landica Wocke to Peteina stylata B. & B. With respect to 

 this determination I remarked: 



»This species was not reared so that the determination 

 is not quite certain. I believe, however, that only Peteina stylata 



1) Entomologiske Meddelelser II R. 4. Bd. 1909, pag. GO— 62. 



») La Cellule XXVI, 1910, pag. 34. 



«) Meddelelser om Grenland XLIII, 1910, pag. 30. 



