Panorpa bistriata Issiki, 1929b
Diagnosis: Wings have two complete bands – the pterostigmal band and the basal band. Occasionally basal band is absent. There is usually a marginal spot present between the two bands. Pterostigmal band is not branched. Male hypovalves are narrow and slightly divergent, with a medial cleft almost to the base of the 9th sternite, and extend to apex of basistyles. Basal lobes of dististyles have an acute point. Ventral parameres short, extending from medial phalange of basistyle to just beyond basal lobe of dististyle; branched from base as medial lobes that touch at midline. Female genitalia a pair of sinuous rods apically tapered and pointed medially.
Distribution – Geographical: This species was originally described from Mt. Sankakuho (= Meifeng), 7500 ft. [2286 m], 25 May 1928, S. Issiki, 6♂♂, 5♀♀ (depository ?); Mt. Tattaka (= Sungkang), 7000 ft. [2133.6 m], 3 June 1927, K. Fukuda, 1♂, 2♀♀ (depository ?); and Mt. Guntaisan, 7000 ft. [2133 m], 11 July 1925, S. Issiki, 6♂♂, 5♀♀ (depository ?). Additional records are: Hassenzan, 5 June 1942, S. Issiki, 1♂ (USNM); Hassenzan, 7 June 1942, S. Issiki, 1♂ (USNM); Hsinchu County, Shei-Pa National Park, Wa-Lu East trail, 24°30.095’N, 121°07.439’E, 2043 m, 30 April 2010, A. & N. Penny, Tsou Mei-Hua, and Chi-Feng Lee, 5♂♂ (CAS); same data, except 1 May 2010, 1♀ (CAS); Shei-Pa National Park, Wa-Lu West trail, 24°30.057’N, 121°06.755’E, 2057 m, 1 May 2010, A. & N. Penny, Tsou Mei-Hua, and Chi-Feng Lee, 1♂ (CAS). Ilan: Taipingshan Forest Recreation Area, Cuifeng Lake, 24°31’05”N, 121°36’04”E, 17 May 1999, L.B. and C.W. O’Brien, 1♂ (CAS).
Distribution – Temporal: Records indicate an emergence from late April until early June.
Ecology: The area of Shei-Pa National Park is moist, mixed coniferous and deciduous forest. Some of the specimens were collected as high as 5 m above ground level.
Biology: Issiki and Cheng (1947) indicate that one of the ♀♀ from Mt. Sankakuho has been designated as allotype.
Notes: There appears to be a population of this species near Cuifeng Lake that only has a single, pterostigmal band across the wings. It appears that no lectotype has ever been selected from the syntype series.
Issiki, S. 1929b. Descriptions of new Mecoptera from the Japanese Empire. Transactions of the Natural History Society of Formosa 19:260-314.
Issiki, S. and F.-y. Cheng. 1947. Formosan Mecoptera with Descriptions of new Species. Memoirs of the College of Agriculture, National Taiwan University 1(4):1-17. 3 plates.
Yie, S.-T. 1951. The Biology of Formosan Panorpidae and Morphology of Eleven Species of their immature Stages. Memoirs of the College of Agriculture, National Taiwan University, 2(4):1-111.