Toxorhina (Ceratocheilus) fuscolimbata Alexander, 1967

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 : 62-66

Taxon classification Animalia Diptera Limoniidae

Toxorhina (Ceratocheilus) fuscolimbata Alexander, 1967 Figs 3, 4

Toxorhina (Ceratocheilus) fuscolimbata Alexander 1967: 185. Type locality: Hkayam Boum, Manipur, Assa, India.

Diagnosis.

Rostrum shorter than wing. Prescutum brownish yellow with three broad and nearly confluent brownish black stripes. Pleuron yellow with two black stripes. Wing tinged pale grey, black seams along cord and m-m and paler seam over base of CuA; R2+3 ending beyond end of basal section of R4+5, basal section of CuA1 beyond fork of M and at one-third of cell dm. Abdomen with sternites more or less bicolored. Male hypopygium with two pairs of gonostyl. Rods of aedeagus short.

Description.

Male. Body length 5.0-5.5 mm, wing length 5.5-6.0 mm, rostrum length 3.5 mm.

Head (Fig. 3b). Brownish black. Hairs on head black. Antenna length 0.5-0.6 mm. Scape brownish black; pedicel black; flagellomeres brownish black. 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. Pronotum brownish black. Prescutum brownish yellow with three broad and nearly confluent brownish black stripes. Scutum brownish black with middle area paler, each lobe with a light yellow spot. Scutellum and mediotergite brownish black (Fig. 3c). Pleuron (Fig. 3a) yellow with two black stripes, upper one extending from cervical region to mediotergite, lower one extending from fore coxa to middle coxa. Hairs on thorax black. Fore coxa brownish black, middle and hind coxae pale yellow; trochanters brownish black; femora yellow to brownish yellow with tips darker; tibiae and tarsi brownish yellow. Hairs on legs black. Wing (Fig. 3d) tinged pale grey, black seams along cord and m-m and paler seam over base of CuA; veins pale brown, darker at CuA and A2 and in clouded areas. Venation: Sc1 ending a very short distance beyond origin of Rs, Sc2 a greater distance before origin of Rs; R2+3 ending beyond end of basal section of R4+5; basal section of CuA1 beyond fork of M and at one-third of cell dm; A1 curved suddenly at middle, basal half nearly straight. Haltere length 0.8-0.9 mm, white.

Abdomen (Fig. 3a). Tergites dark brown. Sternites brownish yellow with caudal 1/3 to 1/2 dark brown, sometomes uniformly dark brown. Segments six to eight uniformly dark brown to brownish black. Segment nine yellow to brownish yellow. Hairs on abdomen brownish black.

Hypopygium (Fig. 4). Generally dark brown. Gonocoxite cylindrical. Clasper of gonostylus slender and rod-shaped, curved ventrally and inwards, tip acute. Lobe of gonostylus with two stout spines near base. Interbase oval. Aedeagus with tip divergent, rods short.

Female. Body length 6.0-7.0 mm, wing length 5.5-6.0 mm, rostrum length 3.5-3.8 mm. Similar to male. But antenna obviously longer, each flagellomere subequal. Tenth tergite pale brown. Cercus dark brownish yellow. Hypogynial valve brownish yellow with base brownish black. Tip of hypogynial valve reaching at 2/5 of cercus (Fig. 4e).

Specimens examined.

2 males 2 females (CAU), China: Guangxi, Baise, Mt. Cenwanglao (24°29'12"N, 106°20'55"E, 1300 m), 2013.VII.29, Yuting Dai & Mengchao Tan. 4 males (CAU), China: Yunnan, Gongshan, Dulongjiang (27°40'32"N, 98°20'3"E, 1542 m), 2013.VII.1, Wei Zhang. 1 male (CAU), China: Xizang, Yigong (2300 m), 1978.VII.29, Fasheng Li.

Distribution.

China (Guangxi, Yunnan, Xizang); India.

Remarks.

This species is recorded from China for the first time. For description and illustration of this species, also see Alexander (1967, 1970).