NEW DIPTERA IN THE IT. S. NATIONAL MUSEUM. By D. W. COQUILLETT, Custodian, Section of Diptera. In the course of identifying-ttie New Jersey diptera for Dr. J. B. Smith's excellent list of the insects of that State, ]Mr. C. W. Johnson, curator of the Wagner Free Institute, of Philadelphia, encountered quite a series of specimens belonging to obscure groups which he was unable to identify within the limited time allowed him for this pur-pose, and consequently submitted them to the writer for study. Mr. Johnson permitted the retention for the U. S. National ]SIuseum collec-tion of specimens pertaining to species not already represented therein, the only conditions being that the data from the labels be sent him, together with the names of the known forms and manuscript names of such as were believed to be new to science. As these manuscript names have now been published it is deemed advisable to publish descriptions of these species and thus render permanent the names which would otherwise have no value. i\.ccorcl 'ngly, these descriptions are offered herewith, together with a number of those of other forms encountered when identifying specimens for correspondents, or while stud3'ing and comparing the Museum collection. These make a total of 2 genera and 71 species. Family MYCETOPHILIDvE. BOLITOPHILA MONTANA, new species. Dark brown, the base of the third antennal joint, peduncle of the halteres, coxte, femora and tibite light yellow, sides of mesonotum largely brownish yellow, mesonotum polished; wings hyaline, stigma elongate oval, gray; auxiliary vein reaches only slightly beyond middle, between humeral cross vein and base of third vein, anterior branch of third vein terminates in the costa, fourth vein at its base coalescing for a short distance with the upper branch of the fifth near its base; length, 4.5 mm. A female specimen, collected by Mrs. A. T. Slosson. Ilahltat. — Mount Washington, New Hampshire. Tyjye.—C^t. No. 5438, U.S.N.M. Proceedings U. S. National Museum, Vol. XXIll— No. 1225. Proc. N. M. vol. xxiii 38 593
BioStor
