Strophosoma (Strophosoma) melanogrammum

Gosik, Rafal, Sprick, Peter & Czerewko, Katarzyna, 2017, Morphology of the larvae of three Central European Strophosoma Billberg, 1820 (Coleoptera, Curculionidae, Entiminae) species, Deutsche Entomologische Zeitschrift 64 (1), pp. 27-42 : 31-33

Strophosoma (Strophosoma) melanogrammum Figs 3, 4, 18-22, 23, 24-28, 45

Body.

Rather stout, yellowish, abdominal segment VIII dark brown. Setae medium-length to very short. Each side of prothorax (Fig. 18) with 11 prns, two setae placed below spiracle. Meso- and metathorax (Fig. 18) each with one medium-sized prs and 4 pds: first very short, second short, third very long; fourth medium. Each pedal area with 6 pda, variable in length. Eps1 on abdominal segments I-VII almost twice as long as eps2 (Figs 19 20). Abd. segments I-VII each with 5 pds: first, second and fourth medium, third and fifth long. Abd. VIII with 3 pds and 2 very short ss1, 2 (Figs 20-22).

Head.

Dark brown, almost circular (Fig. 23). Antennal basal membranous article with 6 basiconic sensillae (Fig. 24). Labrum (Fig. 25) approximately 1.7 times as wide as long; anterior margin rounded, serrate due to some thorn-like cuticular processes located between ams; als rod-shaped. Surface of epipharynx between labral rods densely covered by conical asperities. Labral rods relatively short. Clypeus (Fig. 25) 2.5 times as wide as long; anterior margin almost straight. Mandible (Fig. 26) conical, cutting edge poorly developed; mbs rather short. Both maxillary palpomeres equal in length, but basal one distinctly wider than distal; maxilla with 6 dms and 4 vms, all finger-like (Figs 27, 28). Praelabium heart-shaped, with two pairs of ligs, variable in length; basal palpomere slightly shorter and wider than distal; pslb2 3 times longer than remaining pslb.