@inbook {21851, title = {Order Diptera (pp. 341-346) in Ashmead, W.H. Reports upon the insects, spiders, mites and myriapods collected by Dr. L. Stejneger and Mr. G.E.H. Barrett-Hamilton on the Commander Islands}, booktitle = {Fur seals and fur-seal islands of the North Pacific Ocean. Part. IV}, year = {1899}, author = {Coquillett, D. W.} }