460 Mr. T. D. A. Cockerell on Fossil Arthropods 
marginal cell. The preefurca is as in L. cinctipes, Say. The 
thorax and abdomen are dark fuscous. 
In. 17114 (A’Court Smith). 
Mongoma pallescens, sp.n. (Fig. 11.) 
Wing 4 mm. long, or slightly more ; hyaline, with pale 
yellowish veins. Only part of the venation can be made 
out, but the upper part of the wing closely resembles 
M. pennipes, O.-S., and M. fragillima, Westw. The second 
Fig. 11. 
Mongoma pallescens, sp. n. 
marginal cell is rather broadly joined to the submarginal 
below it, a feature which readily distinguishes the species 
from M. cruciferella, Ckll. (A new specimen of M. cruci- 
ferella (In. 17259), with wing about 6 mm. long, has been 
found in the collection.) 
I. 8898 (Brodie collection). 
Gonomyia ferrea, sp.n. (Fig. 12.) 
Wing pale ferruginous, with bright ferruginous nervures ; 
subcostal cell red. The part preserved is about 3 mm. long; 
from end of second basal cell to apex of wing is nearly 
2 mm, 
Fig. 12. 
Gonomyia, ferred, sp. D. 
H. 835. This is very near G. cognatella, O.-S., but has a 
longer first submarginal cell. In this character it also 
differs from G. aperta, Brunetti. 
