Caliroa slug sawflies of Japan (Hymenoptera, Tenthredinidae) Author Hara, Hideho Nishi 4 Kita 3 4 - 29, Bibai, Hokkaido 072 - 0033, Japan. E-mail: harahideho @ bell. ocn. ne. jp Author Ibuki, Shinichi Wami 1355 - 13, Nakagawa, Tochigi, 324 - 0612 Japan. E-mail: banbi-fa @ ktd. biglobe. ne. jp text Zootaxa 2020 2020-05-04 4768 3 301 333 journal article 22416 10.11646/zootaxa.4768.3.1 a068f737-c024-4d3d-b88b-665915062ec6 1175-5326 3783994 C8036F69-F881-4727-96E7-C78AA6C7F920 Caliroa aizankei Hara sp. nov. ( Figs 2E, F , 3I, T , 4M , 5I , 9A, B ) Description: female ( holotype ). Length 4.5 mm . Black, shiny with colorless reflection ( Fig. 2E, F ). Labrum dark brown. Mandible black, apically reddish brown. Palpi yellow brown, basally darkened. Legs black; femora narrowly brownish apically; fore and middle tibiae yellowish white; hind tibia yellowish white on basal half; tarsi yellowish white, slightly darkened apically; tibial spurs and claws yellow brown. Wings brown, becoming pale on apical third; veins and stigma brown to black. Postocellar area 1.5 × as wide as length behind lateral ocellus, without anterior groove. Clypeus emarginated ventrally ( Fig. 3I ); depth of emargination 0.2 × median length of clypeus. Malar space narrower than facet of eye, without setae. First flagellomere 0.8 × as long as second and third flagellomeres combined ( Fig. 3T ); apical four flagellomeres combined 1.4 × as long as first flagellomere. Forewing with joint of vein Rs and crossvein 2r-rs located at apical 0.4 of anterior margin of cell 1Rs2 ( Fig. 2E ); basal corner of cell 1M acute. Hind wing with joint of vein 1A and crossvein cu-a located apical to apex of cell 1A ( Fig. 4M ); crossveins 2r-m and m-cu absent. FIGURE 9. Lances and lancets (A, C, E) and middle ventral parts of lancets (B, D, F). A, B, Caliroa aizankei , holotype. C–F, C. staphyleae : C, D, lectotype of C. staphyleae ; E, F, holotype or paratype of C. staphylea . 5, fifth serrula. E, F, reversed. Punctures generally minute. Head and thorax mostly smooth between punctures. Mesoscutellum posterolaterally with several relatively large punctures along posterior margin ( Fig. 5I ). Mesoscutellar appendage mostly with setigerous punctures. Dorsum of abdomen very slightly microsculptured. Lance ( Fig. 9A ) with dorsal margin very slightly serrate apically. Lancet ( Fig. 9A, B ) with 14 serrulae; ctenidia pale, ventrally extending to level of base of serrula; middle serrulae about as deep as wide, with some anterior and posterior teeth [serrulae in Fig. 9A, B are probably severely worn]; areas between middle serrulae slightly or moderately convex, slightly wider than adjacent serrula. Male . Unknown. Material examined . Holotype ( Figs 2E, F , 3I, T , 4M , 5I , 9A, B ): ♀ , “[ Hokkaido ] Aizankei , Mt. Daisetsu , 29. vii. 1955 , Col. K. Morimoto ”. Etymology . The species epithet is named after the locality and is a noun in apposition. Distribution . Japan : Hokkaido . Remarks . Among eastern Palearctic and Oriental species, Caliroa aizankei is similar to C. staphyleae and part of C. vaccini in having the combination of a black body with colorless reflection, a pale marked hind tibia and basally dark and apically transparent wings and a female hind wing with the joint of a vein 1A and a crossvein cu-a located apical to the apex of a cell 1A. These three species are distinguished as stated under the key above. In the key to western Palearctic species by Lacourt (2002) , C. aizankei goes to the couplet 6, but does not agree with either line of the couplet. In the key to Nearctic species by Smith (1971) , C. aizankei goes to the couplet 6 consisting of C. distincta Smith, 1971 and C. lunata MacGillivray, 1909 , but it is distinguished from them by apical four flagellomeres combined 1.4 × as long as a first flagellomere [subequal in length in the latter two] and a lancet with 14 serrulae [16 to 17 serrulae in C. distincta ; 17 to 19 serrulae in C. lunata ].