Lilioceris dentifemoralis Long, 1988

Figs 7, 8, 28A-D, 38A-C, 47A-D, 57A-C, 68

Lilioceris dentifemoralis Long, 1988: 231 (China: Hainan).

Type material examined.

Holotype of Lilioceris dentifemoralis (MBSU, photo), Hainan, Jianfengling, Tianchi, 1981.7.6, Junxiong Zhang coll. / holotype, Lilioceris dentifemoralis Long ♂, Jianguo Long det. / 603 / En-207215 SYS; allotype of Lilioceris dentifemoralis (MBSU, photo), Hainan, Jianfengling, 1964.V.3-5, Hui Ren coll. / Allotype, Lilioceris dentifemoralis Long ♀, Jianguo Long det. / En-207214 SYS.

Other material examined.

Total 6 specimens. China: 1♀, Hainan, Jianfengling, 1981.8.13 / Maobin Gu collector / Lilioceris dentifemoralis det. Liang H.B. , 2020; 1♀, Hainan, Jianfengling, 1964.V.10 / Tailu Chen collector/ Lilioceris dentifemoralis det. Peiyu Yu / Lilioceris dentifemoralis, compared with type, det. Liang H.B., 2004.3; Vietnam: 1♀, Tonkin, Cho Ganh, L Duport / Lilioceris dentifemoralis, det. Liang H.B. ; 1♀ 2♂, Tonkin.

Diagnosis.

Anterior angles of pronotum slightly protruding, pronotal disc with two or three irregular rows fine punctures. Humeral groove of elytra distinct, punctures of elytra diminishing posteriorly, absent on apical 1/4. Femora of mid- and hind legs with tooth. Lateral metasternum with a wide strip of pubescence.

Redescription.

BL = 7.0-8.0 mm, BW = 3.5-4.0 mm. Body brownish red.

Head (Figs 7, 38A). Vertex flat, with a shallow groove in the middle, sparse punctate and pubescent laterally; frontoclypeal area triangular, lateral disc with sparse punctures and setae; labrum transverse, with sparse setae; antennae nearly 1/2 of body length, antennomeres 1-4 nearly globular, antennomere 2 shortest, antennomeres 5-10 nearly 1.5 × as long as wide, antennomere 11 slender.

Pronotum (Figs 7, 38B). Anterior angles slightly protruding, posterior angles not protruding; sides constricted in the middle; disc slightly raised; middle of disc with two or three irregular rows fine punctures.

Elytra (Figs 7, 28B). Humeri protruding, humeral groove and basal impression distinct; strial punctures large in the base, diminishing posteriorly, absent on apical 1/4; intervals smooth; epipleura raised, with a sparse row of fine punctures.

Mesosternum pubescent. Lateral metasternum with an arcuate strip of pubescence, extending from anterior margin to lateroposterior corner. Metepisternum densely pubescent (Fig. 38C).

Abdominal sternite (Fig. 28A). Lateral transverse impressions big and distinct on sternites 1-3, other areas of sternites 1-3 and all of sternites 4 and 5 densely pubescent.

Leg (Fig. 28C). Femora with dense pubescence on the dorsal surface, nearly smooth on the ventral surface, femora of hind legs with a distinct tooth, and middle legs with a weak tooth.

Male genitalia (Fig. 47A-D). Ostium occupying 1/5 length of median lobe (Fig. 47A); apex round (Fig. 47B); tegmen Y-shaped, basal piece of tegmen triangular and narrow, lateral lobes slightly sclerotized and combined with second connecting membrane; internal sac membranous, with distinct dorsal, median, and ventral sclerites, posterior part of dorsal sclerite in dorsal view slightly widen, ventral sclerite short and flat, median sclerite distinct (Fig. 47C, D).

Female reproductive organs (Fig. 57A-C). Tergites 8 and 9, sternites 8 and 9 sclerotized, posterior areas of tergite 8, sternite 8, and apodemes with pubescence, spiculum gastrale Y-shaped and long; ovipositor with dense pubescence, distal part of ovipositor cylindrical, short, and with a protuberance; spermatheca simple and hooked.

Distribution

(Fig. 68). China (Hainan); Vietnam.

Host plant and habitat.

Host plant is unknown. We visited Jianfengling of Hainan where all Chinese specimens were collected, located in a subtropical area. The habitat is mixed primeval forest, orchards, and farmland with high temperatures, plentiful precipitation, and plenty of sunlight. The type locality, Tianchi, refers to a lake area surrounded by shrubs and tall trees.

Remarks.

Lilioceris dentifemoralis can be distinguished from other species in this group by the femora of mid- and hind legs with a tooth (Fig. 32C). This species seems to be very rare: we tried several times to collect this species in Hainan but failed.