▁bugs ▁show ▁yellow - b rown ▁to ▁brown ▁pron ot um ▁and ▁cor ium . ▁An ten na e ▁are ▁gray - yellow . ▁The ▁head ▁and ▁pron ot um ▁are ▁covered ▁with ▁wh it ish ▁long ▁ere ct ▁hair s . ▁These ▁bugs ▁are ▁also ▁character ized ▁by ▁the ▁alternate ▁dark ▁and ▁light ▁mark ings ▁on ▁the ▁legs ▁and ▁conne xiv um . ▁Moreover ▁fore ▁fem ora ▁are ▁armed ▁with ▁a ▁single ▁sp ine ▁and ▁the ▁pale ▁tib iae ▁show ▁three ▁dark ▁ann ulations . ▁The ▁ro str um ▁reaches ▁only ▁to ▁the ▁middle ▁co x ae . ▁ ▁Bi ology ▁Ad ult s ▁over w inter ▁beneath ▁b ark ▁or ▁in ▁h ollow ▁wo ody ▁stem . ▁They ▁emer ge ▁in ▁the ▁following ▁spring ▁and ▁mate ▁in ▁June ▁and ▁July . ▁During ▁m ating ▁male ▁and ▁females ▁may ▁remain ▁couple d ▁together ▁for ▁ 3 - 4 ▁days . ▁E gg s ▁are ▁laid ▁with ▁a ▁cop ious ▁secret ion ▁in ▁the ▁ground ▁near ▁the ▁host ▁plant . ▁Lar va e ▁can ▁be ▁found ▁until ▁September . ▁The ▁new ▁generation ▁is ▁complete ▁from ▁late ▁summer ▁on wards . ▁Ad ult s ▁often ▁forms ▁consp ic uous ▁aggreg ations ▁on ▁n ett les . ▁ ▁The ▁main ▁hosts ▁plants ▁in ▁Europe ▁are ▁the ▁st ing ing ▁n ett les ▁( U rt ica ▁dio ica ), ▁but ▁the ▁bugs ▁have ▁been ▁also ▁reported ▁on ▁o thes ▁species ▁of ▁U rt ica ▁and ▁on ▁roots ▁of ▁the ▁mar ram ▁grass ▁( A mm