Bactra venosana (Zeller, 1847)

Naik, Santhosh, Shashank, P. R. & Garg, Shivanshu, 2022, New records of Tortricidae (Lepidoptera) from Himachal Pradesh, India, Records of the Zoological Survey of India 122 (1), pp. 73-82 : 77-78

Bactra venosana (Zeller, 1847)

( Figures 3, 8 , 13 , 18 )

1960. Bactra banosii Gozmany, Ann. Hist. Nat. Mus. natn. Hung. 52: 416.

1931. Bactra geraropa Meyrick, Exotic Microlepid. 4: 147.

1900. Bactra punctistrigana Mabille, Annls Soc. ent . Fr. 68 (1899): 751.

1911. Bactra scythropa Meyrick, Proc. Linn. Soc. N. S. W. 36: 254.

1909. Bactra truculenta Meyrick, J. Bombay Nat. Hist. Soc. 19: 586.

Type Locality: USA, New York, Syracuse ( venosana ); India, North Coorg, Dibidi ( truculenta ) ( Pathania et al., 2020).

Material examined: INDIA: Himachal Pradesh: Berthin (31.4188° N, 76.6427° E, 300m), 3 ♂, 21.ix.2018, Light trap coll. Santhosh ; INDIA: Himachal Pradesh: Palampur (32° 6’ 37.9512’’ N, 76° 32’ 10.4064’’ E, 1290m), 2 ♂ ,

10.viii.2018, Light trap coll. Santhosh.

Description: Ocellus present well developed. Cheatosemata present, region of vertex and anterior part of frons covered with a group of long upward and slightly anteriorly projecting scales are present which are creamy white to light black in color, apex of the each scales are bilobed. A pair of well-developed labial palpi moderately long, porrect, grayish and interspersed with amber white colored scales. Three segmented labial palpi, basal segment ½ the length of second segment, second segment narrower at the base and gradually broader at the apex with outward projected scales and apical segment is ¼ the length of the second segment. Maxillary palpi is very minute, 2 or 3 segmented, small lateral bristles and whitish scales present. Proboscis short and ½ length of labial palpi but longer than maxillary palpus. Antenna, filiform and covered with forward projected small amber colored scales and minute cilia. Basal segment of antenna bigger in diameter than the rest of segments.

Thorax: Without crest, covered with light yellow colored scales.

Wings: Forewing of male long, slender, subrectangular, without costal fold, rounded apex. Wingspan of male 17-18 mm. Costal margin of male forewing with flat grayish scales interspersed with black and cream colored scale; grayish interspersed with orange color scale at the apical margin gives a parallel pattern on the forewing. Forewing subcosta arises from base of discal cell, R1 arises from ½ discal cell, all veins are separate, chorda at the apex of discal cell from which R2, R3, R4 and R5 arises separately, R1, R2, R3, R4, M1 and M2 parallel to each other, M-stem weakly developed, R5 and M1 connate basally, M2, M3 and CuA1 arises from the vicinity of apex of M-stem, connate basally, CuA1 bent downward basally. CuA2 arises from ¾ discal cell, CuP ½ length of 1A+2A. Hindwing dark grayish with fringes present along the margin. Hindwing Rs and M1 stalked, M2, M3 and CuA1 connate basally and arises from base of closing vein, M 2 in line with M-stem, CuP well developed, 1A+2A, 3A and CuP present.

Abdomen: Yellowish gray scales covered in both male and female.

Male genitalia: Uncus well developed, short and firm, curved, knob s et al ong boundaries with a thick palisade of bristles. Tegumen broad, well sclerotized. Socii lateral membranous lobe, slightly sclerotized. Gnathos is broad and slightly sclerotized. Valva quite elongated and slender, with a clavate cucullus that relatively short, with a broad, obliquely rounded top fringed with flattened pegs. Sacculus broad, with strong apical bristles and a group of short bristles at middle of marginal portion. Juxta stong, triangular, wider laterally. Vinculum broad at the base, wedge-shaped, ventral edge curved with minute teeth. Aedeagus short, robust, bulged at the base and narrower apex.

Distribution: India (Himachal Pradesh (present study), Karnataka, West Bengal, Andaman Islands). Elsewhere: Southern Europe, North Africa, Sri Lanka, China, Malaya, Australia, Indonesia, the Philippines, Taiwan, Timor and Hawaii ( Pathania et al., 2020).

Remarks: This species feeds on Poaceae plants. Bactra chariessa Diakonoff, 1964 and B. coronate Diakonoff, 1950 are closer to B. venosana . In the male genitalia of B. Venosana vinculum with ventral edge irregularly denticulate compared to smooth in B. coronata . Tubal analis is reduced in B. venosana where as it is rather rigid, puctualate oval plate in B. chariessa . Diakonoff (1963) review genus Bactra Stephens and provided diagnosis for many species. Horak (2006) also redescribed genus Bactra from Australia and provided genitalia figures for B. venosana .

Figures

Figures 1–10. Adults and labial palp. Adults: 1. Clepsis rurinana Linnaeus, 1758, male; 2. Lumaria probolias (Meyrick, 1907), male; 3. Bactra venosana (Zeller, 1847), male; 4. Bactra furfurana (Haworth, 1811), male; 5. Gibberifera obscura (Diakonoff, 1964), male. Labial palpi, 6. C. rurinana; 7. L. probolias; 8. B. venosana; 9. B. furfurana; 10. G. obscura

Figures 11–15. Forewing and hind wing venation: 11. Clepsis rurinana Linnaeus, 1758, male; 12. Lumaria probolias (Meyrick, 1907), male; 13. Bactra venosana (Zeller, 1847), male; 14. Bactra furfurana (Haworth, 1811), male; 15. Gibberifera obscura (Diakonoff, 1964), male.

Figures 16–20. Male genitalia and aedeagus: 16. Clepsis rurinana Linnaeus, 1758; 17. Lumaria probolias (Meyrick, 1907); 18. Bactra venosana (Zeller, 1847); 19. Bactra furfurana (Haworth, 1811); 20. Gibberifera obscura (Diakonoff, 1964)