370 
Psyche 
[December 
NOTES ON THE SYRPHIDAE COLLECTED AT 
JAFFREY AND MOUNT MONADNOCK, N. H., 
WITH A DESCRIPTION OF A NEW SPECIES 
By Charles W. Johnson 
Boston Society of Natural History 
My first visits to Jaffrey and Mt. Monadnock, N. H., were 
made in February and March, 1917. Even with the deep 
snow covering the beautiful woodland and mountain, one 
could readily see that this would be an ideal place for col- 
lecting. June, 1917, was therefore selected for another 
two weeks visit. Arriving on the 15th, the flowers of the 
choke cherry were just opening and for four days I caught 
hundreds of syrphids and other insects on these blossoms. 
Later the flowers of a Cornus followed by those of a Vi- 
burnum attracted many other species. Among the speci- 
mens obtained were about seventy species of Syrphidse. 
In 1920 another visit was made, this time covering a period 
from June 4th to 14th. In the depression back of the old 
red school house some timber had recently been cut and 
from the stumps of sugar maple and birch sap was still 
flowing freely, the fermented sap containing many larvse 
from which were bred Ferdinandea dives and Brachyopa 
perplexa. The Cornus bushes were mostly dead, probably 
winter killed by the severe cold of January, 1918. My next 
visit was in 1923, staying from June 14th to the 23rd. A 
few rainy days had made the cherry blossoms poor col- 
lecting ground but this loss was somewhat made up by the 
flowers of the raspberry which had grown up on the clear- 
ing back of the old red school house, species of Criorhina 
and Xylota being especially common. My next visit cover- 
ing a period from May 9th to 21st, 1925, was perhaps the 
most interesting. To see the various spring species appear 
one after the other was a very enjoyable experience. An 
old oak log along the brook near “The Ark” was visited 
daily from the 14tb to the 21st to secure the two species of 
