Trachystolodes Breuning 1943

Trachystolodes Breuning, 1943 ḆX+Oi

Trachystolodes Breuning, 1943: 188; Breuning, 1961: 319; Rondon & Breuning, 1970: 424; Pu, 1980: 90; Löbl & Smetana, 2010: 287; Lin & Yang, 2019: 323. Type species: Trachystola bimaculata Kriesche, 1924.

Redescription. Body black, densely covered with short brown setae (dorsal setae denser than ventral setae); head, antennae, prothorax, scutellum, mesosternum, metasternum, elytra, abdominal sternites and legs sparsely covered with short white setae (the white short setae on antennae gradually sparser from 7 th to 11 th segments, most of white short setae on elytra mainly located on apical 1/3 and forming some small irregular spots); frons, genae and vertex sparsely covered with short dark brown setae located in rounded punctuations; elytra sparsely covered with short black setae (parts of black setae located at basal 1/2 of elytra respectively located in a small sub-oval punctuation, rest of black setae located at apical 1/3 forming some small irregular spots), with a pair of black setal spots near middle.

Frons, genae and vertex strongly wrinkled and sparsely covered with rounded punctuations, eyes coarsely faceted; antennae longer than body, antennal scape strongly wrinkled, gradually thickened from base to apex and reaching to or beyond middle of pronotum, apical cicatrix of antennal scape opened; pedicle nearly as long as wide. Pronotum transverse and strongly wrinkled, with pointed lateral spines located slightly in front of middle, with three calluses (two small located in front of middle and one slightly large near basal middle); prosternal process narrow and with a longitudinal furrow in middle, distinctly lower than procoxae; procoxal cavity closed posteriorly. Scutellum lingulate. Elytra broader than prothorax basally, gradually constricted towards posterior and abruptly constricted near apical 1/3, rounded apically; disc with a pair of oblique depressions at basal 2/5; each elytron covered with large numbers of granules at basal 3/5, big granules mainly forming three longitudinal curved lines (first line starting from near posterior of humeri and extending along elytral margin to near anterior of black setal spot, second line raised at basal 1/5 of elytra, starting from near basal middle and extending to near anterior of black setal spot, third line from near posterior of scutellum and extending to near basal 1/4), rest of small granules located among above three lines; elytral sides covered with large numbers of big and small granules at basal 2/3, granules denser basally and gradually sparser towards posterior. Mesosternal process raised in center, midcoxal cavity open to epimeron externally. Fifth abdominal segment distinctly longer than 2 nd, 3 rd and 4 th segments. Tarsi with 4 segments.

Diagnosis. Trachystolodes is similar to Mimechthistatus Breuning, 1956 and Pseudotrachystola Breuning, 1943, but Trachystolodes can be distinguished from Mimechthistatus by the granules at basal 3/5 of elytron mainly forming three longitudinal and curved lines (the granules not forming three longitudinal and curved lines on elytron in Mimechthistatus, figs. 53–54), elytra not separated at apex (elytra distinctly separated at apex in Mimechthistatus, figs. 52–54, 56, 58); hind wing not vestigial [hind wing vestigial in Mimechthistatus (Chou, 2008)]. The differences between Trachystolodes and Pseudotrachystola refer to Xiang et al. (2016).

Range. China, Laos, Vietnam.