Macrophya cheni, Li & Liu & Wei, 2014

Li, Ze-Jian, Liu, Meng-Meng & Wei, Mei-Cai, 2014, Four new species of sanguinolenta-group of the genus Macrophya (Hymenoptera: Tenthredinidae) from China, Zoological Systematics 39 (4), pp. 520-533 : 522-524

3.1.1 Macrophya cheni sp. nov. ( Figs 1–9 )

Diagnosis. The new species is similar to M. minutiluna Wei & Chen, 2002 from China. Compared with M. minutiluna , the new species is characterized by middle fovea shallow, long dot-like; lateral foveae not deep; postocellar area 2.2 times broader than long; dorsal side of hind tibia without white macula subapically; setae on sheath curved in dorsal view; middle serrulae of lancet with 7–10 distal teeth, subbasal teeth small. In M. minutiluna , middle fovea distinct, broad dot-like; lateral foveae deep; postocellar area 2 times broader than long; dorsal side of hind tibia with a small white macula subapically; setae on sheath almost not curved in dorsal view; middle serrulae of lancet with 5–6 distal teeth, subbasal teeth slightly large.

Description. Female. Body length 7.0 mm. Body mostly black. The following parts white: base of mandibles, apical 1/2 of clypeus, posterior margin of postocellar area, narrow band on posterior margin of pronotum, broad band on posterior margin of tergite 1, transverse maculae on posterior corners of tergite 3–5 (small maculae on posterior corners of tergite 2 and 6 at times), apical margin of tergite 10, apical margins and narrow stripes of fore and middle coxae, apex and a long oval macula on outer side of hind coxa basally, small maculae on anterior sides of fore and middle femora apically, stripes on anterior side of fore tibia and hind trochanter. The following parts reddish brown: hind tibia except for apical 1/3 with black maculae (or hind tibia almost entirely reddish brown, apical margin with feeble black maculae), metabasitarsus except for apex with black maculae, hind tarsomere 2–4 except apex with black maculae. Body hairs silver, setae on sheath black brown. Wings hyaline, below stigma with feeble and pale smoky, transverse maculae, stigma and veins black brown ( Fig. 1 ).

Dorsal head less shiny, fron densely and coarsely punctured, without smooth interspaces and microsculpture between punctures ( Fig. 2 ); labrum and clypeus with large and shallow punctures, surface weakly coriaceous. Mesonotum less shiny, punctures on mesonotum as minute and dense as punctures on head, almost without smooth interspaces between punctures; mesoscutellum less shiny, with large punctures, interspaces between punctures narrow; posttergite with shallow punctures; metascutellum with indistinct punctures, microsculptures fine. Mesepisternum densely punctured, not distinctly coarse, interspaces with fine microsculptures between punctures, upper 1/2 with slightly large punctures, lower 1/2 with slightly minute punctures; anepimeron dull, with dense wrinkles; anterior margin of katepimeron smooth and shiny, without puncture or microsculpture; most of posterior area with coarse and rugose punctures, microsculptures distinct; metepisternum dull, minutely and densely punctured; metepimeron with shallow and sparse punctures, microsculptures distinct ( Fig. 5 ). All tergites less shiny, lateral tergite 1 shallowly punctured, center without distinct microsculpture; other tergites with fine microsculptures, punctures minute and shallow. Surface of sheath coriaceous, with indistinct punctures and fine microsculptures. Hind coxa and hind femur densely punctured on outer side, interspaces between punctures with fine microsculptures.

Labrum weakly elevated, anterior margin truncated; clypeus weakly elevated, slightly broader than distance between lower corner of eyes; lateral sides distinctly convergent forwards, anterior margin subarc and incised to approximately 1/3 length of clypeus, lateral lobes subtriangular, apical margins obtuse ( Fig. 3 ); malar space 0.5 times diameter of middle ocellus; fron elevated, ocellus slightly higher than top of eyes in lateral view; middle fovea shallow but distinct; lateral foveae deep, short dot like; interocellar furrow distinct, postocellar furrow indistinct; POL: OOL: OCL = 5: 10: 6.5; postocellar area weakly elevated, 2.2 times broader than long, lateral furrows slightly shallow and divergent backwards; head strongly narrowed behind eyes in dorsal view, occipital carina complete. Antenna slender, 1.4 times longer than head and thorax together (17: 12), 1.1 times longer than abdomen (17: 14); antennomere 2 about 1.3 times as long as broad; antennomere 3 about 1.4 times as long as antennomere 4 (10: 7), 0.8 times as long as antennomeres 4 and 5 combined (4: 5), antennomeres 6–9 weakly compressed ( Fig. 4 ). Mesoscutellum roundly elevated, without carina, as high as top of mesonotum in lateral view; posttergite with lower middle carina, metascutellum with short middle carina; dorsal-posterior platform of mesepimeron 1.2 times as broad as diameter of lateral ocellus; posterior corner of metepimeron subquadrate, without appendage; mesopleuron and metapleuron as shown in Fig. 5 ; distance between cenchri thrice breadth of a cenchrus. Inner tibial spur of hind leg approximately 0.67 times length of metabasitarsus (2: 3); metabasitarsus slender, 1.1 times longer than following 4 tarsomeres together (12: 11), hind tibia and tarsus as shown in Fig. 6 ; claw with inner tooth shorter than outer tooth. Ovipositor sheath as long as middle femur, approximately 0.83 times as long as metabasitarsus (5: 6), apical sheath slightly longer than basal sheath (8: 7), apical margin roundish in lateral view ( Fig. 7 ). Fore wing with vein cu-a joining cell 1M at basal 1/4, vein 2r joining cell 2Rs at apical 1/3, cell 2Rs slightly longer than cell 1Rs; petiole of anal cell in fore wing 2 times longer than vein 1r-m, but slightly shorter than vein cu-a; petiole of anal cell in hind wing as long as 1/2 times length of vein cu-a. Lancet with 19 serrulae ( Fig. 8 ), serrulae slightly flat, middle serrulae each with 1 proximal and 7–10 distal teeth, subbasal teeth small, annular spine bands broad, spine dense; serrulae 8–10 at base as shown in Fig. 9 .

Male. Unknown.

Holotype female, China, Hubei, Mt. Shennongjia, Honghuaduo Forest Farm (31°15′N, 109°56′E; elev. 1 200 m), 3 July 2007, Yi-Hai Zhong leg. Paratype 1 female, China, Guizhou, Mt. Fanjing, Jinding , 13 July 1983, Xue-Xin Chen leg.

Distribution. China (Hubei, Guizhou).

Etymology. The specific name is from the family name of the collector, and for the honor of Prof. Xue-Xin Chen.

Figures

Figs 1–9. Macrophya cheni sp. nov. 1. Adult female, dorsal view. 2. Female head, dorsal view. 3. Female head, front view. 4. Female antenna. 5. Female mesopleuron and metapleuron. 6. Female hind tibia and tarsus, lateral view. 7. Ovipositor sheath, lateral view. 8. Lancet. 9. The 8th–10th serrulae of lancet. Scale bars: 1=1mm, 8=100μm, 9=50 μm.