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‘so that a closer comparison with living species is not possible.’’ 
The antennz are described as fifteen-jointed and twice as long as 
the body, with equal cylindrical joints; the halteres are nearly 
as long as the abdomen; the wings have the first longitudinal 
vein (schulterader) rather distant from the auxiliary (randader), 
with.which it is connected by the subcostal cross vein before the 
middle of the wing. From this brief description it is impossible 
to tell where it belongs, but the fifteen-jointed antennez point to the, 
Limnobini. 
In 1859 and 1870, HEYDEN described in the Palgontographica 
the following species, all from Rott in Rhenish Prussia. 
Ctenophora decheni. Both the form of the abdomen and the 
character of the antennz show it to bea male. Heyden says the 
neuration shows little variation from that of living species of 
Ctenophora. But his delineation of the same is like no Cteno- 
phora and manifestly incorrect, affording no clew to the affinities 
which a correct sketch might offer. The stout legs show that it 
cannot be a Tipula, and the apparently pectinate antennz suggest 
a possible alliance to South American forms like Ctedonia and 
Ozodicera. The specimens should be restudied, but in the mean- 
time be retained in Ctenophora. 
Lrioptera dane. ‘The wings are not preserved, or only along the 
costal margin. By the short middle femora, the spurless tibiz, and 
the small size, it was referred by Heyden to Erioptera. It would 
probably not be possible to place it more definitely. The male 
appendages also agree fairly. 
Limnobia sturi. The two figures of the same wing do not agree, 
but the differences are slight, and the description shows the enlarged 
figure to be the more correct, as indeed the left wing (not enlarged) 
shows. It is plain from the neuration that the insect is not a Lim. 
nobia in its present sense, but a Gonomyia, and not very far 
removed from G. profundi from Florissant. 
NovAk, in 1877, published an account of the fossil insects of 
Krottensee, Bohemia, in the Svtzungsberichte of the Vienna 
academy. Among them were the following Tipulide : 
Tipula angustata. This species closely resembles 7. sepulchri 
from Florissant, but the latter is nearly twice as large. ‘This 
Krottensee species is the smallest fossil ‘Tipula known. 
Tipula expectans. ‘This species has a very long preefurca. It 
PROC. AMER. PHILOS. SOC, XXXII. 148. W. PRINTED JAN. 9, 1894. 
