207 
longitudinal vein, and at a less distance beyond the tip of the aux- 
iliary vein than the breadth of the wing. The submarginal is much 
longer than the first posterior cell. The discal cell is moderately 
small, equal, about half as long again as broad and distinctly but 
not greatly shorter than the posterior cells beyond it. The great 
cross vein strikes the fourth longitudinal vein at a slight distance 
before the discal cell. The seventh longitudinal vein is rather 
short. A slight infumation marks broadly the position of the 
stigma, the veins are all exceptionally heavy and fusco-luteous, the 
wing barely infumated. Three legs are preserved on the single 
specimen known and are presumed to be the hind pair and one 
middle leg. 
Length of wings, 7.5 mm. ; mid femora, 5.2? mm. ; tibiz, 5.5 
mm. ; hind femora, 5.2 ? mm.; tibiz, 5.75 mm. ; tarsi, 5 mm. 
Florissant, Colorado. One specimen, No. 9399. 
Rhamphidia loewi. 
eat. 35 fig. 2. 
The auxiliary vein ends at a little less than half way from the_ 
origin of the second to that of the third longitudinal vein, the sub- 
costal cross vein at its tip. The prefurca arises considerably be- 
yond the middle of the wing, is nearly straight and declivent, and 
is less than half as long as the remainder of the vein. The first 
longitudinal vein is as in the preceding species. The submarginal 
is much longer than the first posterior cell. The discal cell is 
rather elongate, equal, twice as broad as long and fully as long as 
the posterior cells beyond it. The great cross vein strikes the dis- 
cal cell near to but distinctly removed from the base of the latter. 
The seventh longitudinal vein is normal. The wing is hyaline, 
with a very faint infumation at the stigma, the veins luteous and 
delicate. The legs are detached and partly obscured (though in a 
natural position) so that the measurements are mostly in doubt. 
Length of wings, 7.25 mm. ; fore femora, 5.5? mm. ; tibiz, 6.5 
mm.; mid femora, 6? mm.; tibiz, 6.5? mm.; hind femora, 6.4? mm. 
Named in memory of Dr. H. Loew, the distinguished investiga- 
tor of the amber Diptera. 
Florissant, Colorado. One specimen, No. 1369. 
