Body length, males 2.9–3.0 mm, females 2.8–2.9 mm. Vertex (Fig. 1A) pale yellow, with pair of small black spots. Coronal suture short, with two irregular markings on sides (Fig. 1A and C). Eyes greyish-black. Pronotum yellow, with irregularly dark brown or black patches (Fig. 1A and C). Scutellum light yellow, with basal triangles black and transverse impression distinct (Fig. 1A and C). Face light brownish-yellow, frontoclypeus with black patches at sides basally (Fig. 1D). Forewing milky white, with light brown patches. Abdominal apodemes small, not extended to hind margin of 3^rd sternite (Fig. 2G).

Figure 1.  

Mitjaevia bifurcata sp. n. A. Habitus, dorsal view B. Habitus, lateral view C. Head and thorax, dorsal view D. Face.

Figure 2.  

Mitjaevia bifurcata sp. n. A. Male pygofer, lateral view B. Subgenital plate C. Style D. Aedeagus, ventral view E. Aedeagus, lateral view F. Connective G. Abdominal apodemes.

Male genitalia. Pygofer lobe broad, with many microtrichia and fine setae scattered on lateral surface, occasionally with long fine setae. Pygofer dorsal appendage expanded basally, caudal margin round (Fig. 2A). Subgenital plate short, with three long macrosetae on lateral surface and row of peg-like setae along dorsal margin to medium area, with sparse fine small setae on apical portion (Fig. 2B). Style long, with pre-apical lobe moderately large (Fig. 2C). Preatrium of aedeagus short and aedeagus shaft slender; at the base of aedeagus with small appendages ; dorsal apodeme branched apically; gonopore apical on ventral surface (Fig. 2D and E). Connective Y-shaped, arms and stem developed, with long and thin central lobe (Fig. 2F).

Female genitalia. Female 7^th sternite as in Fig. 3A and B. Valvula I elongate, curved dorsad, apical portion pointed, with dense imbricate carving (Fig. 3C and D). Valvulae II elongate, gradually expanded from base to top and divided into two blades, one of which has dentate protrusions (Fig. 3E and F). Valvula III leaf-like, with microtrichia on dorsal margin and apex (Fig. 3G and H).

Figure 3.  

Mitjaevia bifurcata sp. n. A. Female pygofer B. Sternite VII C. Valvula I D. Partial enlargement of valvula I E. Valvulae II F. Partial enlargement of valvulae II G. Valvula III H. Partial enlargement of valvula III.

The new species is named from the Latin word “bifurcatus”, referring to dorsal apodeme branched of the aedeagus.

This species has a similar aedeagus shape to Mitjaevia protuberanta Song, Li, Xiong, 2011 (Song et al. 2011), but it can be distinguished by the aedeagal shaft slender; pre-atrium of aedeagus short, dorsal apodeme branched apically and without triangle-like processes subapically.

Distribution. Guizhou Province.

Body length, males 2.50-2.70 mm. Vertex (Fig. 4A) light yellow, with pair of small black spots. Coronal suture short, with two irregular black markings on both sides (Fig. 4A and C). Eyes greyish-black. Pronotum yellowish, with symmetrical pale-yellow oval impressed patches medially, (Fig. 4A and C). Scutellum yellow, with black lateral triangles, transverse impression distinct. Face light brownish-yellow, frontoclypeus with black patches at sides basally; anteclypeus dark brown (Fig. 4D). Forewing with orange and grey patches. Abdominal apodemes small, extended to hind margin of 3^rd sternite (Fig. 5H).

Figure 4.  

Mitjaevia ramosa sp. n. A. Habitus, dorsal view B. Habitus, lateral view C. Head and thorax, dorsal view D. Face.

Figure 5.  

Mitjaevia ramosa sp. n. A. Male pygofer, lateral view B. Pygofer dorsal appendage, lateral view C. Subgenital plate D. Style E. Aedeagus, ventral view F. Aedeagus, lateral view G. Connective H. Abdominal apodemes.

a

b

c

d

Figure 6.

Aedeagus of Chinese species of Mitjaevia (Figs. from original plates).

a: M. wangwushana Song, Li & Xiong A. aedeagus, ventral view B. aedeagus, lateral view  
b: M. protuberanta Song, Li & Xiong C. aedeagus, ventral view D. aedeagus, lateral view  
c: M. diana Distant E. aedeagus, ventral view F. aedeagus, lateral view  
d: M. korolevskayae Dworakowska G. aedeagus, ventral view H. aedeagus, lateral view.  

Male genitalia. Pygofer lobe broad, with numerous microtrichia and fine setae scattered near caudal part and dorsal margin. Pygofer dorsal appendage expanded basally, tapering to apex and hook-like apically (Fig. 5A and B). Subgenital plate short, wide and midfield slightly concave, with three macrosetae, numerous peg-like setae along dorsal margin (Fig. 5C). Style apex expanded, "curved neck" area slender, pre-apical lobe obvious, enlarged (Fig. 5D). Pre-atrium of aedeagus little expanded in lateral view, aedeagus shaft slender, with pair of "finger-like" processes arising from base of shaft and extending outwards, bifurcated into two branches apically (Fig. 5E and F). Connective Y-shaped, two lateral arms and stem developed, median anterior lobe well developed (Fig. 5G).

The new species is named from the Latin word “ramosus”, referring to the aedeagal shaft with two bifurcated branches at apex.

The new species is similar to Mitjaevia diana (Distant 1918), but differs in having the "finger-like" processes arising from base of aedeagal shaft and extending outwards; two bifurcated branches at apex; connective Y-shaped and stem developed.

Distribution. Guizhou Province.