360 Annals Entomological Society of America _[Vol. V, 
2d Ri, dark brown; a brown cloud at the origin of Rs; veins broadly 
margined with the dark-ground color leaving the centers of the cells 
pale. Venation: Rs rather long, somewhat angulated basally; Rois 
about one-third longer than Rg»; cross-vein r connects Ry far beyond the 
fork of Ro43; deflection of Ri;; and r-m about subequal; sides of the 
elongate cell Ist Me parallel, petiole of cell M, short, only about one- 
third as long as the cell; cross-vein m-cu indicated by a point. Ct 
one-half longer than the basal deflection of Cun. 
Abdomen: Tergum, brown, 2d segment deeply impressed in the 
center, except at the median line; lateral margins of the sclerites with a 
basal yellow triangle; sternites yellow, caudal margins darker, brownish. 
Ovipositor: Segment 9 short, the valves slender, but flattened blade- 
like; lower valves, short, very high, blade-like; nearly twice as high 
as the tergal valves. 
Holotype, @, Piches and Perene Vs., Peru, 2000-3000 feet, 
(Pres. by Soc. Geog. de Lima). 
Coll. U. S.Nat. Mus. (No: 15,074): 
Microtipula, gen. n. 
Antenne elongated in the o and apparently 12-segmented, the 
flagellar segments very elongated, clothed with a long, pale pubescence; 
two or three bristles at the base of each segment and, usually, one near 
the middle. Anterior prolongation of the front short; nasus not dis- 
tinct. Wings: Sc long extending beyond the origin of Rs to a distance 
about equal to Roi3; Rs long, gently arcuated, not quite as long as R;; 
cross-vein r at the fork. Re indicated only basally, its tip atrophied. 
Cross-vein 7-m short, about as long as 7; cross-vein m long, a little less 
than the basal deflection of Mj,2; cross-vein m-cu obliterated by the 
touching of Cu, and M3. Hypopygium complex, penis very long. 
Type, M. amazonica, sp. n. 
This genus is proposed for a tiny species from Eastern 
Brazil, which, by its combination of characters, will not fit 
into any of the existing genera. In its venation (i. e. oblitera- 
tion of the terminal section of R,) the species suggests certain 
Dolichopezine genera. In my key to the Dolichopezini* it 
would not fit in either of the primary sections; in the Megis- 
tocera group because of its complex hypopygium or in the 
Dolichopeza group because of its 12-segmented antenne. It 
bears a slight resemblance to Megistomastix which has a very 
different hypopygium and 13-segmented antenne. I prefer 
to believe it to belong to the Tipulini. In Skuse’s keyj to the 
Tipuline genera it would run down to Habromastix of Australia. 
However, this genus as well as all the 77pulini known to me, 
*Psyche; Vol. 19, p. 64 (April, 1912). 
tDipt. Austral.; pt. 8; Tipul. longipalpi (Proc. Linn. Soc. N. S. W.; Vol. 5, 
(2d series). Feb. 26, 1890; p. 78-81.) 
