219 
are fnllgrown in the middle of August, and tho flies emerged from 
the puparia about 14 days after the larvæ had bored out. The 
emergence of the flies in the autumn as a normal feature was 
later on stated by the capture of a fly in september. The flies 
perhaps hibernate and probably have a generation, which infests 
other hosts than earwigs. In this respect it is worth noting, 
that Rhacodineurci is recorded as bred from the caterpillars of 
Tceniocampa miniosa F., which occur in the spring. 
In the beginning of August Mr. J. P. Kryger collected 239 ear¬ 
wigs in his garden in Gentofte; 10 of them died before the examina- 
tion; of the rest 
14 contained maggots of Rhacodineura antiqua Meig, 
25 — -— - Digonochæta setipennis FIL 
1 — a maggot of Digonochæta and a Gordius forjiculæ 
auriculariæ Diesing. 
22 — Gordius forjiculæ auriculariæ Diesing. 
167 — no parasites. 
Ernestia connivens Zett. 
Se veral caterpillars of Mamestra persicariæ found in the autumn 
1913 in the environs of Copenhagen were infested with the maggots 
of this species. The first stage maggot is not known. The phar- 
yngeal skeleton of the 2. and 3. stage maggots are remarkable 
having no articulation between the mouth-hooks and the anterior 
part of the skeleton, and besides in the 3. stage there is no articula¬ 
tion between the anterior and posterior pharyngeal plates. All the 
maggots examined were attached to the skin of the hosts by means 
of a funnel originating in all cases from the closest neighbourhood 
of a spiracle; from this position I was inclined to believe that the 
funnel was some way or other connected with the tracheæ of the 
hosts, but a doser examination showed that this was not the case. 
The pupation takes place in the earth and the pupæ hibernate. 
