Promalactis dimolybda Meyrick, 1935

Du, Zhaohui & Wang, Shuxia, 2013, Genus Promalactis Meyrick (Lepidoptera, Oecophoridae) from China: Descriptions of twelve new species, ZooKeys 285, pp. 23-52 : 45-46

Promalactis dimolybda Meyrick, 1935 Figs 153038

Promalactis dimolybda Meyrick, 1935: 78. Type locality: China (Tien-Mu-Shan).

Material examined.

China,Zhejiang Province: 2 ♂, 33 ♀, Mt. Fengyang, Lishui City, 1470 m, 25−30.VII.2007, coll. Qing Jin. Fujian Province: 19 ♀, Guadun, Mt. Wuyi, 1100 m, 28.VII−2.VIII.2008, coll. Weichun Li, Yongling Sun & Haiyan Bai. Hubei Province: 1 ♀, Houhe, Wufeng County, 1100 m, 11.VII.1999, coll. Houhun Li et al., genitalia slide Nos. W00106 ♀, ZL08133 ♂, DZH08042 ♀, DZH08043 ♀, DZH08044 ♂, DZH08046 ♀, DZH12039 ♀, DZH12040 ♀, DZH12112 ♀ (NKU); Sichuan Province: 3 ♂, 3 ♀, Wanniansi, Mt. Emei, 14.VI.1979, genitalia slide Nos. DZH12007 ♀, DZH12008 ♂, DZH12041 ♂ (IOZ).

Diagnosis.

This species is similar to Promalactis taibaiensis Wang, Zheng & Li, 1997, but can be separated by the aedeagus with two apical spines and two cornuti in the male genitalia; the ductus bursae concave ventrally at middle on posterior margin and membranous between posterior 3/5−3/4, and the signum with small distinct or indistinct teeth on posterior end in the female genitalia. In Promalactis taibaiensis , the aedeagus has four apical spines and one cornutus; the ductus bursae is slightly convex ventrally on posterior margin and entirely sclerotized, and the signum has dense teeth.

Redescription.

Adult (Fig. 15). Wingspan 9.5−11.5 mm. Head with vertex shining white, frons shining leaden grey, occiput yellowish brown. Labial palpus with basal and second segments yellow, third segment dark brown, almost same length as second. Antenna with scape white; flagellum white and black on dorsal surface, dark brown on ventral surface. Thorax and tegula ochreous brown. Forewing ground colour ochreous yellow; a narrow white fascia from costal 1/4 to dorsal 2/5, its inner margin edged with dense black scales, area ochreous brown from inner margin to base; a broad dark grey fascia at 3/5, tinged with black scales, its inner margin straight, outer margin sinuate; a wedge-shaped dark grey fascia from apex of costal margin along termen to end of fold, tinged with black scales; a narrow dark grey band along dorsal margin between two dark fasciae and connected them; cilia yellow, dark grey along distal part of costal margin, grey along distal part of dorsal margin. Hindwing and cilia dark grey.

Male genitalia (Fig. 30). Uncus nearly bell shaped, broad at base, gradually narrowed to 3/5, distal 2/5 slender, rounded at apex, laterally with setae. Gnathos tongue shaped, about 2/3 length of uncus, distal 1/2 scobinate, apex broadly rounded; lateral arm short, band shaped, about 1/3 length of gnathos. Tegumen branched from posterior 1/2, very narrow anteriorly. Valva narrowed and setose distally, apex narrowly rounded and directing dorsad; costa sinuate, concave at base and before apex, projected at middle. Sacculus narrow, slightly concave at basal 3/5 on dorsal margin, distal 2/5 setose; distal 1/5 free, serrate dorsally; apex pointed, directing dorsad, not reaching end of valva. Saccus slender, rod-like, slightly broader at base, rounded at apex, almost as long as valva. Juxta weakly sclerotized, short, with a small, slender awl-shaped basal process; lateral lobes broad, irregularly quadrate, rounded at apex, reaching middle of tegumen. Aedeagus gently curved, dilated distally, with two curved, basally joined distal spines; two joined or separate, spine-like cornuti present at middle: one very small, the other larger, sometimes deciduate.

Female genitalia (Fig. 38). Apophysis anterioris stronger than and about 1/2 length of apophysis posterioris. Ductus bursae about twice length of corpus bursae, posterior margin ventrally concave at middle and protruded laterally, posterior 3/5 sclerotized and sinuate, with some spinules at posterior 3/5, posterior 3/5−3/4 membranous and expanded, anterior 1/4 sclerotized, curved in semi-volute or sinuate; ductus seminalis arising from posterior 2/3 of ductus bursae. Corpus bursae rounded; signum small, nearly oval or rhombic, with small distinct or indistinct teeth on posterior end.

Distribution.

China (Fujian, Hubei, Sichuan, Zhejiang).

Note. Themale is described for the first time.