372 
Psyche 
[December 
Chalcomyia xrea Loew. May 14-21, 1925. 
C. cyanea Smith. May 16-19, 1925. 
Cynorhinella longinasus Shan. Holotype June 4, 1920. 
Myiolepta nigra Loew. June 11-18, 1917, 1926. 
M. varipes Loew. June 18, 1917. 
Ferdinandea dives 0. S. Bred from larvae in sap oozing 
from the stumps of maple and birch. Adults emerged 
June 25 to July 6, 1920. 
Baccha cognata Loew. June 19, 1917. 
B. fascipennis Wied. June 28, 1917. 
Pyrophaena rosarum Fab. June 16, 1923. 
Platychirus chxtopodus Will. June 7-10, 1920. 
P. hyperboreus Stseg. June 15, 1917. 
P. peltatus Meig. June 15, 1917. 
Melanostoma confusum Curr. May 14, ’25, June 11, ’20. 
M. mellinum Linn. May 18, ’25, June 19, ’17. 
M. obscurum Say. May 9, ’25, June 18, ’17. 
Didea fa.sciata var. fuscipes Loew. June 19, 1917. 
Syrphus lapponicus Zett. (arcuatus auct.) June 12, 1926. 
S. amalopis O. S. June 15-19, 1917. 
S. johnsoni Curr. Type June 15, another June 18, 1917. 
S. latifasciatus Macq. June 27, 1917. 
S. laticaudus Curr. May 9-18, ’25, June 4-10, ’26. 
S. nitens Zett. May 17, 1925. 
S> perplexus Osburn. June 28, 1917. 
S . rectus O. S. June 14-18, 1917-’20. 
S. ribesii Linn. May 19- June 21, 1917. 
S. ribesii var. vitifrons Shan. June 15-19, 1917. 
S. torvus 0. S. May 19, 1925. 
S. venustus Meig. June 4-15, 1917-’20. 
Epistrophe arcticus Zett. May 9, 1920. 
E. diversipes Macq. June 9-21, 1917-’23. 
E. fisheri Walt. June 18-27, 1917. 
E. genualis Will. May 9, ’20, ’25, June 15, ’17. 
E. mentalis Will. May 12, 1925. 
E' oronoensis Mete. May 17, 1925. 
E. umbellatorum Fab. June 4, 1920. 
E. xanthostomus Will. May 18 ’25, June 18, ’17. 
E. xylotoides John. One male, June 18, 1917. 
Dor os xqualis Loew. June 14, 1920. 
