22 
Pelatachina tibialis Fil. 
The maggot is parasitic in the caterpillars of Vanessa lo L. and 
iirticæ L. I have only seen the maggots in the 3rd stage; these 
were connected with the host by means of funnels originating from 
the tracheae. In most cases the caterpillars contained only one single 
maggot, but in a few cases I have found two parasites in the same 
host. The maggots pupate in the earth, and the puparia hibernate. 
The fly is single-brooded. 
At the pupation some maggots did not obtain the normal shape 
of the puparia, but retained their larval shape. The flies which were 
reared from these maggot-like puparia had the legs somewhat deform. 
Cistogaster globosa Fal. 
The host of this fly is a hemipteron, Ælia acuminata L. The 
eggs were found deposited on the skin of the dorsal side of the 
abdomen beneath the wings. The maggot had penetrated into the 
host through a hole in the bottom of the egg-shell. I have not suc- 
ceeded in finding a funnel connecting the parasite with its host. 
The fullgrown maggots leave the host through its anal end. The 
host dies and the maggot pupates in the earth. I June—^July mag¬ 
gots in 2nd and 3rd stages are found in the bugs and at the same 
time eggs, from which the maggots have not emerged. These mag¬ 
gots are full-grown in July and the flies emerge in the same 
month. The emerged flies deposit their eggs on the bugs and in 
August fullgrown maggots again are found in the hosts. 
Gymnosoma rotundatum L. 
I have found the Gijmnosoma infesting full-grown specimens 
of a hemipteron, Chlorochroa Juniperina L. As to the habits of 
the maggots my investigations have confirmed those ofj. Kunckel 
d’Herculais and J. Pantel. 
Subclytia rotundiventris Fil. 
On the Ist of May I took on birch a specimen of Elasmiicha 
grisens Linn, bearing on the upper side of the thorax a minute 
white egg. On May 10 the hemipteron died and a small brownish 
