5. Lateral grooves reaching scutal mid- Lateral grooves confined to posterior 6. Lateral grooves confined to posterior 7. Lateral grooves reaching at least scutal midlength (if specimen is heavily punc tate, grooves may be obscure).... Scutum smooth, shiny with rare, scattered .H. IMPELTATUM Figures 170 and 171 ..H. DROMEDARII Figures 162 and 163 .H. EXCAVATUM Figures 166 and 167 ..7 .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. |