Sitona lineatus (Linnaeus, 1758)

Sitona lineatus (Linnaeus, 1758) View in CoL

( FIgS 27–29e View FIGURES 27 – 29 )

Body. LeNgTH: 4.8–5.2 MM, MAXIMUM WIDTH (AT THe leVel OF PROcOXAe): 2.6–2.7 MM, HeAD WIDTH (AT THe leVel OF eYeS): 1.0–1.2 MM, PROTHORAX WIDTH (AT WIDeST PlAce): 1.3–1.6 MM (♀, ♂). EYeS HeMISPHeRIcAl. BODY MODeRATelY elONgATe, WHITe. PRONOTUM TRAPeZIUM-SHAPeD, APPROXIMATelY 1.8 TIMeS AS WIDe AS lONg. MeTANOTUM SlIgHTlY lONgeR THAN MeSONOTUM. AbD. I–IV OF AlMOST eQUAl leNgTH, AbD. V –VIII DIMINISHINg gRADUAllY, AbD. IX DISTINcTlY SMAlleR THAN THe PReceDINg SegMeNTS. UROgOMPHI RelATIVelY SHORT, WITH Well ScleROTIZeD APIcAl PART.

Chaetotaxy . SeTAe OF UNeQUAl leNgTH AND SHAPe, YellOW OR bROWN, ON HeAD , ROSTRUM AND THORAX HAIR-FORM, bASeD ON PROTUbeRANceS, ON AbDOMINAl SegMeNTS HAIR-FORM OR THORN-lIke, THe lATTeR bASeD ON DISTINcT PROTUbeRANceS. ROSTRUM WITH TWO PAIRS OF rs 1-2; HeAD cAPSUle beARINg 1 vs, 2 sos 1-2, 2 os 1-2 AND 2 pas 1-2 ( FIgS 27e, 29e View FIGURES 27 – 29 ). PRONOTUM WITH 2 as 1-2, 2 ds 1-2, ls, 2 sls 1-2 AND 2 pls 1-2 ( FIgS 28e, 29e View FIGURES 27 – 29 ). All SeTAe OF PROTHORAX PlAceD ON SMAll PROTUbeRANceS, RelATIVelY SHORT, as 1, ls AND pls 2 SOMe SMAlleR THAN THe ReMAININg SeTAe. MeSO- AND MeTATHORAX eAcH WITH 3 PAIRS OF MODeRATelY elONgATe d 1-3, FORMINg A gROUP IN THe ceNTeR ( FIg. 28e View FIGURES 27 – 29 ). TeRgAl PARTS OF AbD. I–VII eAcH WITH 7 PAIRS OF PROTUbeRANceS WITH SHORT, THORN-lIke SeTAe; SeTAe 1–5 FORM A RegUlAR, TRANSVeRSe ROW AlONg THe POSTeRIOR MARgIN, SeTAe 6 AND 7 ARe PlAceD MORe lATeRAllY. SeTAe NO. 1, 3, 5 AND 6 DISTINcTlY bIggeR THAN THe ReMAININg, SO AT FIRST VIeW cHAeTOTAXY OF eAcH SegMeNT SeeMS TO cONSISTS OF 4 PAIRS OF SeTAe ONlY. AbD . VIII WITH A PAIR OF DISTINcT THORN-lIke SeTAe AND TWO PAIRS OF WeAklY DeVelOPeD, SHORT, HAIR-lIke SeTAe ( FIgS 28e, 29e View FIGURES 27 – 29 ). AbD. IX WITH 2 SHORT SeTAe, PlAceD clOSe TO UROgOMPHI, NeXT 2 lOcATeD DORSAllY ( FIgS 27e, 29e View FIGURES 27 – 29 ). EAcH UROgOMPHUS beARS A PAIR OF SHORT SeTAe.