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5. Lateral grooves reaching scutal mid
length; scutum largely covered by
.H. IMPELTATUM Figures 170 and 111
Lateral grooves confined to posterior
.H. DROMIDARII Figures 162 and 163
6. Lateral grooves confined to posterior
third of scutum; scutum almost im
.H. EXCAVATUM Figures 160 and 167
Lateral grooves reaching at least scutal
7. Scutum smooth, shiny with rare, scattered
large punctations; lateral grooves long
..H. DETRITUM* Figures 160 and 161
*A closely related "form" of uncertain taxonomic status, "H. scupense", with some biological and morphological characters differing from those of typical H. marginatum, occurs in parts of the Soviet Union and southeastern Europe.
*Exceptional specimens of H. turanicum may lack this aspect. Others of H. marginatum and H. impeltatum may approach this aspect.