128 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
a large spot at the humeral cross-vein, origin of the radial sector, end 
of the subcosta, and radius (Rj Rj) with smaller sjjots at the ends of 
all the other veins; the largest one at the end of the subcosta is slightly 
ocellate and extends to the radial cross-vein; aside from these there 
are ten small spots in the costal cell, two or three in the marginal, 
three in the first and six in the second submarginal, about eight in each 
of the basal cells, seven in the first, one in the second, four in the third, 
two in the fourth, and one in the fifth posterior cells; tlie discal cell 
has two, anal and axillary cells about ten each, and the spurious cell 
five. Length, 8 mm. 
One 9 , Riverton, New Jersey, Aug. 5, 1902. Type in the author's 
collection. 
Limnophila ruflbasis Osten Sacken. 
PI. 16, figs. 21-23. 
Among some specimens received from Professor John B. Smith 
for determination, was a remarkable anomaly of this species. It is a 
small male in which the venation of both wings is very different and in 
both cases abnormal. In the right wing (pi. 16, fig. 22) the discal 
cell seems to extend from the radius (Rg), to the cubitus (Cuj), owing 
to the presence of a supernumerary cross-vein across the first posterior 
cell and the absence of the basal portion of the median M^; a very 
slight stub, however, indicates the position of this vein. The branch 
M2 of the normal wing, is also wanting. In the left wing (pi. 16, 
fig. 23) the discal cell opens into the first posterior cell owing to the 
absence of the basal portion of the median Mj, the vein being deflected, 
and appearing as if branching from INIg. The branch M2 of the normal 
vein is present. The dotted line shows the probable position of the 
missing vein. Figure 21 (pi. 16) represents the normal wing. The 
specimen was associated with a normal specimen from Culver's Lake, 
Warren County, New Jersey. 
In the Tipulidae there seems to be a tendency in certain species, of 
a large genus, to have an unusual number of specimens with abnormal 
venation. This seems to be the case in this species. Another speci- 
men before me has a supernumerary cross-vein in the marginal and 
another in the second submarginal cell, while minor variations are 
numerous. 
