February, '14] ENTOMOLOGICAL INVESTIGATIONS 21 



as to available time) for usual privileges; especially glad to examine material from 

 mammals. 



Orthoptera. 



R. A. Cooley, Bozcman, Alont., will classify Orthoptera of the Northwest. 



B. H. Walden, New Haven, Conn., will cla.ssify, in so far as other work will permit. 



Membracidoe, Jassidoe, Cercopidoe and Fulgoridoe. 



Z. P. Metcalf, West Raliegh, N. C, will classify for permission to retain new and 

 unusual forms for further study, and to dispose of a fair number of such forms as he 

 may see fit. 



Jassidoe. 



E. D. Ball, Logan, Utah, will classify North American forms under the usual 

 conditions. 



Aphididae. 



C. P. Gillette, Fort Collins, Colo., will classify, provided data on food plants and 

 date and location of capture are furnished, and the privilege of retaining the specimens 

 of sijecial interest when there are duplicates. 



H. F. Wilson, Corvallis, Oregon, willclassifyAp/tidiWce if data on food plants, dates 

 and location of capture are furnished. The correct scientific name of the food plant 

 should be given. 



Aphididce and PsyUidoe. 



Edith M. Patch, Orono, Maine, will classify on receipt of mature material in good 

 condition with record of food plant accurately determined on which the species de- 

 veloped. 



Aleyrodidae. 



J. R. Watson, Gainesville, Fla. 



Coccida; and Aleyrodidoe. 



W. E. Britton, New Haven, Conn., will classify in so far as other work will permit. 



Coccidoe. 



J. G. Sanders, Madison, Wis., will classify species of the genus Lecanium.. 

 R. A. Cooley, Bozeman, Mont., will classify the genera Chionaspis, Hemichion- 

 aspis amd Phenacaspis of the world. 



R. H. Pettit, East Lansing, Mich., will classify in so far as other work will permit. 



Heteroptera. 



Paul S. Welch, Manhattan, Kansas, will classify, in so far as other work will permit, 

 Aquatic Heteroptera. 



SarcophagidcB of the Northeastern U. S., Trypetida;, if sent before May 1, 1914. 

 H. T. Fernald, Amherst, Mass., will classify. 



Chironomida; and Mycetophilidee. 



O. A. Johannsen, Cornell University, Ithaca, N. Y., will classify for the privilege 

 of retaining desiderata. 



Muscoid flies. 



Charles H. T. Townsend, Lima, Peru, S. A., will classify as time permits. Will 

 send names in return for specimens. 



EmpididoE. 



A. L. Melander, Pullman, Wash, (at the Bussey Institution, Forest Hills, Boston, 

 Mass., until June), will determine Empididce (Diptera) for the privilege of retaining 

 desiderata. 



