222 
Tuble of the Genera of American Fossil Tipuline. 
al. Last posterior cell in contact with the discal cell; the latter of moderate size. 
bl. Anterior branch of fourth longitudinal vein unforked, or very feebly 
TOP ed) ke. uct Merete aks: oe aise ketenes te eee Manapsis. 
b?, Anterior branch of fourth longitudinal vein strongly forked. 
cl. Posterior branch of fourth longitudinal vein doubly forked, so that 
there are six posterior cells...............Rhadinobrochus. 
c?. Posterior branch of fourth longitudinal vein simply forked, so that 
there are five posterior cells, 
dt. Preefurca nearly as long as, as long as, or longer than, the width 
of the first and second basal cells together, opposite the 
Origintorl, the) preclurcarererre oe: cnc eee eee Tipula. 
d?. Preefurca not, or scarcely, longer than the greatest width of the 
firsthibasall cell! sa5 ctve eyelets tie, «te cin cleo a eR Tipulided. 
a?, Last posterior cell not in contact with the discal cell; the latter minute. 
Micrapsis. 
MANnapPSIS (paves, adits) gen. nov. 
This name is here given to a genus of crane-flies closely allied to 
Tipula, in which the second posterior cell does not exist, or if it 
does, exists only as an exceedingly small and slender cell formed by 
the apical and very slight forking of the upper branch of the fourth 
longitudinal vein. In the single specimen known it forks thus 
upon one wing and not at all upon the other; the latter would 
appear to be the normal condition to judge from the weak character 
of the fork upon the other wing. So far as I can discover, no such 
condition is known to exist elsewhere among the Tipuline, and I 
accordingly suggest the separation of this form as a distinct genus. 
In all other respects the neuration agrees with that of Tipula and 
Ctenophora, and the legs appear to be much as in Tipula. The 
markings of the abdomen seem to be peculiar, for they consist of 
a very broad pale mediodorsal stripe on an otherwise dark 
abdomen. 
A single species is known. 
Manapsis anomala. 
Pl, peed 
Wings almost four times as long as broad, uniformly infumated, 
with a distinct very dark stigma. Auxiliary vein terminating at the 
middle of the inner marginal cell; poststigmatal cross vein rather 
brief, slightly oblique; trapezoidal cell brief. Praefurca a little 
