1915-16.] Structure and Life-History of Bracon sp. 
331 
Field Observations — continued. 
Date. 
County and 
Locality. 
Date of 
Felling. 
Bracon. 
Other Insects. 
Remarks. 
1915. 
Apr. 11 
Kingshill, 
1912-14 
Fresh cocoons 
Two cocoons of 
The cocoons of Bracon 
Aberdeen- 
plentiful 
the Ichneumon 
occurred chiefly on 
shire 
Ephialtes 
the stumps them- 
tuberculatus 
selves, and less on 
the smaller roots. 
„ 12 
Kintore 
55 
Fresh cocoons 
Adult and larvae 
The cocoons of Bracon 
of Rhagium 
occur chiefly on the 
indagator, 
smaller roots, and 
adult R. in- 
quisitor in 
older stumps, 
one adult 
Acanthocinus 
aedilis 
less on the stumps. 
Comparison of Field and Laboratory Experiments, showing Occurrence 
of Bracon in the various Months. 
Month. 
Field. 
Laboratory. 
Jan. 
Cocoons containing larvae. 
Cocoons containing larvae. 
Feb. 
Cocoons containing larvae. 
Cocoons containing larvae and pupae. 
Mar. 
Cocoons containing larvae. 
Cocoons containing pupae, adults. 
Apr. 
Cocoons containing pupae. 
Pupae, adults, and eggs. 
May 
Cocoons containing pupae, adults. 
All stages. 
June 
Adults, eggs, larvae. 
All stages. 
July 
Adults, eggs, larvae, cocoons containing 
larvae. 
All stages. 
Aug. 
Adults, cocoons containing larvae, larvae. 
All stages. 
Sept. 
Larvae in cocoons, adults. 
Adults, larvae and pupae in cocoons. 
Oct. 
Larvae in cocoons, adults. 
Larvae and pupae in cocoons. 
Nov. 
Larvae in cocoons. 
Adults, larvae in cocoons. 
Dec. 
Larvae in cocoons. 
Larvae in cocoons. 
Hylobius abietis is to be found in all stages throughout the year. 
Summary of Field Notes. 
It will be seen from the foregoing table that during the autumn, 
winter, and spring months the Bracon is almost invariably to be found 
in the cocoon, either as a resting larva or a pupa. So far, unfortunately, 
observations on the adult are almost entirely wanting. These can be 
