Toxorhina (Ceratocheilus) taiwanicola (Alexander, 1923)

Zhang, Xiao, Li, Yan & Yang, Ding, 2015, A review of the genus Toxorhina Loew from China, with descriptions of three new species (Diptera, Limoniidae, Limoniinae), ZooKeys 480, pp. 59-80 : 70

Taxon classification Animalia Diptera Limoniidae

Toxorhina (Ceratocheilus) taiwanicola (Alexander, 1923) Figs 9, 10

Ceratocheilus taiwanicola Alexander 1923: 475. Type locality: Tattaka, China (Taiwan).

Diagnosis.

Rostrum shorter than wing. Prescutum brownish yellow with three broad dark brown stripes. Pleuron dark brown with ventral region paler. Wing tinged pale grey; R2+3 ending before end of basal section of R4+5, basal section of CuA1 before fork of M. Abdomen dark brown. Gonostylus with a relatively small spine near middle. Rods of aedeagus relatively short.

Description.

Male. Body length 4.3-4.6 mm, wing length 4.5-5.4 mm, rostrum length 3.5 mm.

Head (Fig. 9c). Dark brown. Hairs on head brownish black. Antenna length 0.4 mm, dark brown. Pedicel enlarged and nearly globose. First flagellomere subconical; remaining flagellomeres cylindrical, each flagellomere longer and slenderer than previous one, terminal two flagellomeres longest with several long hairs. Rostrum brownish black with black hairs.

Thorax. Generally brownish yellow to brown. Pronotum dark brown. Prescutum brownish yellow with three broad dark brown stripes. Scutum, scutellum and mediotergite dark brown (Fig. 9d). Pleuron (Fig. 9 a–b) dark brown with ventral region paler. Hairs on thorax dark brown. Coxa and trochanters pale brownish yellow; remainder of legs dark brown. Hairs on legs brownish black. Wing (Fig. 9e) tinged pale grey; veins pale brown. Venation: Sc1 ending a short distance beyond origin of Rs, Sc2 a slightly greater distance before origin of Rs; R2+3 ending before end of basal section of R4+5; basal section of CuA1 before fork of M; A1 curved suddenly at middle, basal half straight. Haltere length 0.7-0.8 mm, pale brownish yellow.

Abdomen (Fig. 9 a–b). Dark brown, only hypopygium paler. Hairs on abdomen dark brown.

Hypopygium (Fig. 10). Generally brownish yellow. Gonocoxite conical, dorsal face with two or three setae near tip and a blunt lobe near base, this lobe with numerous setae. Gonostylus with a relatively small spine near middle. Interbase rod-shaped, tip slightly enlarged. Aedeagus with tip divergent, rods relatively short.

Female. Unknown.

Specimens examined.

Holotype male (USNM), China: Taiwan, Tattaka (2250 m), 1921.VIII.18, Teiso Esaki. (One wing and hypopygium are mounted on a similarly labeled microscope slide. All six legs are still attached to the dry mounted body.) Other material: 1 male (CAU), China: Hainan, Ledong, Jianfengling, Mingfenggu (18°42'32"N, 108°49'41"E, 800 m), 2007.X.25, Xingyue Liu.

Distribution.

China (Jiangxi, Taiwan, Hainan).

Remarks.

Male hypopygium of this species is described in detail and illustrated for the first time. For description of this species, also see Alexander (1923). Alexander (1923) described the basal section of CuA1 as "about one-fifth its length beyond the fork of M", whereas it is before the fork of M in both the holotype (Fig. 9a) and the specimen we examined (Fig. 9e).