Vol. XXVII, pp. 29-42 
March 20, 1914 
PROCEEDINGS 
OF TUK . 
BIOLOGICAL SOCIETY OF WASHINGTON 
SOME UNDESCRIBED NORTH AMERICAN SAPROMY- 
ZID/E. 
BY J. R. I\IALL0C1I. 
In working over the material belonging to the Sapromyzidte 
contained in the collection of the Illinois State Laboratory of 
Natural History I found a few species that are evidently unde¬ 
scribed, and herewith present descriptions of these forms, along 
with descriptions of those to which they are most closely allied. 
It is very probable that some of the species now described are 
represented in other collections, as the characters for their dif¬ 
ferentiation are very readily overlooked, and they may readily 
find a place along with examples of the old species unless care¬ 
fully examined. 
In the case of Lonchaea vibrissata there is met with an instance 
of an apparently aberrant form which, provided one considered 
the bristle as a vibrissa, can not he placed in its proper family 
by the synoptic keys in use for this group. I am not, however, 
prepared to consider the strong bristle as the vilu'issa, as it 
does not occupy the same position on the vibrissal angle as in 
the case of those species possessing true vibrissac. This species 
is in other respects a true Lonchaea and may conveniently be 
retained within the limits of that genus. 
I have to thank Dr. S. A. Forbes for permission to puldish 
this paper, and Mr. W. L. McAtee of the Buieau of Bio¬ 
logical Survey for the opportunity of comparing his material 
with that in the collection of the Illinois State Laboratory of 
Natural History. Unless otherwise stated tyi)es are in the latter 
collection. 
7— Pkoc. Biol. Soc. Wash., Voi,. XXVII. I'JII. 
(• 29 ) 
