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longer than the width of the first and second basal cells together at 
its base. Lowest posterior cell much wider at base than at 
margin ; discal cell of medium size, about twice as long as broad. 
Sixth longitudinal vein moderately approximated to the fifth; 
seventh longitudinal vein distinctly less than half as long as 
the wing. Abdomen very dark, with a broad pallid mediodorsal 
stripe. Legs siender, the tibiz distinctly slenderer than the 
femora, which are three fifths as long as the wings. 
Length of wings, 14.75 mm. ; of mid femora, 9 mm. 
Florissant, Colorado. One Q specimen, No. 8200. 
RHADINOBROCHUS (fiadtvos, Bpdzos) gen. nov. 
It is with some hesitation that I propose the above name, as the 
single object upon which it is based is so imperfect. But the por- 
tion that is well preserved is so anomalous, while preserving in most 
of its features the exact neuration of Tipula, that it can hardly be 
properly treated excepting under a distinct generic name. ‘These 
peculiarities consist of two features: the extraordinary slenderness 
of the discal cell, and the presence of a supplementary posterior 
cell by the longitudinal division with slightly unequal but sym- 
metrical halves of the third posterior cell by an additional nervule, 
running from the discal cell to the margin. 
A single species is known. 
Rhadinobrochus extinctus. 
Ede egg nats 7-16 
Wings nearly four times as long as broad, uncolored except for 
the rather faint stigma at the extremity of the inner marginal cell. 
Auxiliary vein terminating at the middle of this cell ; poststigmatal 
cross vein slightly oblique, moderately long ; trapezoidal cell not 
much elongated. Prefurca of normal length. Petiole of second 
posterior cell about half as long as the discal cell ; third posterior 
cell broken into two, as described under the genus ; last posterior 
cell not much wider at base than at margin. Discal cell broadest 
basally, tapering throughout, of the usual length in species of 
Tipula, but four times as long as its basal breadth, not in close con- 
tact with the last posterior cell. Sixth longitudinal vein moderately 
near the fifth. Legs slender, the femora fully three fifths the length 
