Promalactis longisaccata Wang, Du & Li, 2013

Wang, Shuxia, Du, Zhaohui & Li, Houhun, 2013, Taxonomic study of the genus Promalactis Meyrick, 1908 from Southeast Asia (Lepidoptera: Oecophoridae), Zootaxa 3669 (4), pp. 401-455 : 420-421

Promalactis longisaccata Wang, Du & Li , sp. nov.

( Figs 14, 15 , 65 )

Type material: Holotype ♂, THAILAND, Chiang Mai (18°48'N, 98°40'E), 300 m, 9.xii.1985, leg. M. G. Allen, BM 1986−74, genitalia slide No. BMNH-33573 ( BMNH) . Paratype: 1 ♂, Khao Nang Rum (15°18'N, 99°28'E), Uthai Thani Dist , [Chai Nat], 400 m, 1.iii.1986, leg. M. G. Allen, BM 1986−74, genitalia slide No. BMNH-33572 ( BMNH) .

Description. Imago ( Figs 14, 15 ) with wingspan 8.0 mm. Head with vertex shining white, frons shining dark brown, occiput ochreous brown. Labial palpus with basal and second segments grayish yellow on inner surface, brown on outer surface; third segment blackish brown, about same length as second. Antenna with scape white, pecten very dense, dark brown; flagellum with basal 1/2 white, distal 1/2 white and black on dorsal surface, dark brown on ventral surface. Thorax and tegula ochreous brown. Forewing dark ochreous yellow; markings white margined with black: first fascia from base of costal margin to basal 1/4 of dorsal margin, its anterior 1/3 narrow, posterior 2/3 slightly broad; second fascia from about costal 1/5 to middle of dorsal margin, arched, its anterior 2/3 broad, posterior 1/3 narrow; an irregular quadrangular patch at about costal 3/5 extending down to anterior 3/5, its outer margin sinuate; a semicircular spot at apex, edged with dense dark-brown scales except on anterior margin; tornus with a nearly trapeziform or semicircular spot, extending to lower angle of cell, with some dark ochreous yellow scales on dorsal margin; termen with a small elliptic spot at middle; cilia along termen dark ochreous yellow on basal 2/3, yellow on distal 1/3, white along distal part of costal margin, gray along distal part of dorsal margin, tornus tinged with a few white. Hindwing and cilia gray. Foreleg black, tarsus with white spots on dorsal surface; midleg with tibia pale gray on ventral surface, black on dorsal surface, with a tuft of short white scales at middle, with a tuft of long white scales at apex on dorsal surface, tarsus black with white spots; hindleg yellow, tarsus black with white spots on dorsal surface.

Male genitalia ( Fig. 65 ). Uncus bell shaped, basal 3/5 broad, vaulted, parallel laterally, distal 2/5 slender, digitate. Gnathos nearly inverted trapeziform, broad basally, gradually narrowed to 3/5; distal 2/5 somewhat upcurved, heavily sclerotized, scobinate, straight at apex, with a small triangular, subapical process on ventral surface; lateral arms band shaped, about 3/5 length of gnathos. Tegumen branched from posterior 2/5, triangularly narrowed anteriorly. Valva narrow and elongate, parallel dorso-ventrally, apex obliquely truncate; costa narrowly sclerotized, basal 3/5 straight, distal 2/5 concave, setose. Sacculus broad at base, slightly narrowed to 2/3; distal 1/ 3 slightly broadened and setose, with a small, sclerotized, triangular dorso-apical process. Saccus very long and slender, slightly broad at base, rounded at apex, about 1.6 x length of valva. Juxta trough-like; with an elongately funneled process at base, acute anteriorly, reaching 1/4 length of saccus; basal 2/3 sclerotized laterally, apex reaching anterior 1/3 of tegumen. Aedeagus long and thin, almost straight, about 3 x length of valva, slightly thick distally; with two processes near apex: one short, leaf-like, acute at apex, extending distad; another long and very slender, rod-like, about 1/4 length of aedeagus, acute at apex, extending basad; cornutus absent.

Female unknown.

Diagnosis. This new species is similar to P. colacephala Wang, Li & Zheng, 2000 . It can be separated by the gnathos nearly inverted trapeziform, the valva without dorso-apical process, the aedeagus with two processes near apex and the absence of the cornutus in the male genitalia. In P. colacephala , the gnathos is tongue shaped, the valva has a digitate dorso-apical process, the aedeagus has one process near apex and the cornutus is rod-like in the male genitalia.

Distribution. Thailand (Chiang Mai, Chai Nat).

Etymology. The specific name is derived from the Latin prefix longi- (= long) and the Latin saccatus (= saccus), referring to the very long saccus in the male genitalia.

Figures

FIGURES 9–16. Adults of Promalactis spp. 9, P.flagellaris sp. nov., holotype; 10, P.foraminulata sp. nov., holotype; 11, P. fortijuxtalis sp. nov., paratype; 12, P.lancea sp. nov., paratype; 13, P.latuncata sp. nov., holotype; 14, P. longisaccata sp. nov., holotype; 15, P. longisaccata sp. nov., paratype, showing the variation of dorsal spot; 16, P. lophacantha sp. nov., holotype (9– 11, 13–16: ♂, 12: ♀).

FIGURES 63−65. Male genitalia of Promalactis spp. 63, P. parasuzukiella Wang, slide No. ZMUC-NK008; 64, P. similiflora Wang, slide No. MNHU-NK024; 65, P. longisaccata sp. nov., holotype, slide No. BMNH-33573.