2. Donacia (Cyphogaster) provostii

Aedeagus (Fig. 10): Median lobe stubby; ventral edge of median orifice slightly projecting at obtuse angle; median foramen shorter than half of ventral surface of median lobe. Tegmen in ventrum forming very large lobe in lateral view and in dorsum forming large spoon-shaped lobe in dorsal view.

Male internal reproductive system (Fig. 22): Testis discoid in shape, wine red in color. Accessory glands small relative to testis, tubular; of a pair of accessory glands, both 1/2–2/3 times as long as maximal width of 2 testis lobes combined. Lateral ejaculatory duct about half length to maximal width of 2 testis lobes combined; posterior part of ejaculatory duct much thinner in width than common ejaculatory duct; common ejaculatory duct about 3.5 times as long as maximal width of 2 testis lobes combined.

Female internal reproductive system (Figs. 36, 37 & 59): Spermathecal organ connected to bursa copulatrix ventro-apically. Spermathecal capsule scythe-shaped, its opening to spermathecal gland protruding dorsally, distal 1/3 brown and remaining light yellowish brown in color; spermathecal wall relatively thick apically; spermathecal duct becoming bold toward base, 1/2–2/3 times as long as maximal length of spermathecal capsule; spermathecal gland tubular, 3.5–7 times as long as maximal length of spermathecal capsule.