2 Impatiophila acutivalva species group, new

Diagnosis. Anteromost, posterior sensillum of cibarium shorter than twice length of posteromost, medial sensillum (Fig. 3 B). Ovisensilla on ventral margin of oviscapt valve distally decreasing in size (Fig. 6 A). Subapical, trichoid ovisensillum of oviscapt valve weak, as long as apical, peg-like ovisensillum (Fig. 6 H). Spermathecal capsule apically somewhat pointed in lateral view (Fig. 6 N).

Common characters. Cibarial, posterior sensilla nearly straight. Setae of middle row on 2nd costal section of wing all heavy, peg-like, reaching or beyond tip of R2+3. Hindleg tibia without black, apically blunt, stout spines at outer apex on underside (unknown for I. paralongifera, I. ovilongata and I. sikkimensis). Male sternite VI not longer than wide, posteriorly wider, concave on posterior margin (unknown for I. paralongifera, I. ovilongata, I. sikkimensis and I. unicolorata). Epandrium with patch of dense, small setae or stout setulae on caudoventral portion. Distal margin of surstylus not deeply concave. Paramere more or less angled at apicodorsal corner (without exception), not longer than twice of width (except for I. pipa and unknown for I. paralongifera, I. ovilongata, I. sikkimensis and I. unicolorata). Aedeagal basal process not longer than 1/2 of paramere (except for I. magnimaculata). Oviscapt valve slender, not or less expanded in dorsomedial portion, distally concave on ventral margin, with apical portion narrowing in ventral view and 3−4 lateral ovisensilla not tightly arranged on subapicolateral portion. Spermathecal capsule as wide as long.