1 Antennae, dorsal face of the manubrium and legs not scaled................................................... 2
- Antennae, dorsal face of the manubrium and leg coxae with scales............................ L. lignorum -group … 7
2 Ant.IV with apical bulb; 5+5 marginal ciliated chaetae along cephalic ventral groove; dorsal Abd.II m5 ciliated macrochaeta; dorsal Abd.IV B6 smooth microchaeta................................................................................. L. fimetarius Gisin, 1964 (in 1964a) (Europe: Albania, France, Germnay, Portugal, Spain, Sweden. Australia)
- Ant.IV without apical bulb; 3+3 marginal ciliated chaetae along cephalic ventral groove; dorsal Abd.II m5 smooth microchaeta; dorsal Abd.IV B6 thin ciliated macrochaeta............................................. L. praecisus -group … 3
3 Unguiculus truncate................................................................................... 4
- Unguiculus acuminate................................................................................. 5
4 Blue pigment from Th.II to Abd.III; dorsal Abd.IV F2 and F3 as a ciliated macrochaetae............................................................................................ L. nigrofasciatus Womersley, 1934 (Australia)
- Blue pigment from Th.II to Abd.V; dorsal Abd.IV F2 and F3 as a smooth microchaetae.................................................................................................... L. praecisus Schött, 1917 (Australia)
5 Body with blue pigment on thorax and abdomen; labial chaeta r as a smooth microchaeta...... L. nashi sp. nov. (Australia)
- Body without blue pigment; labial chaeta R as a short ciliated macrochaeeta...................................... 6
6 Dorsal cephalic chaeta M2 as a ciliated macrochaeta; dorsal Abd.IV F2 and F3 as ciliated macrochaetae........................................................................................... L. agricolus sp. nov. (Australia)
- Dorsal cephalic chaeta M2 as a smooth microchaeta; dorsal Abd.IV F2 and F3 as a smooth microchaetae....................................................................................... L. coorongensis sp. nov. (Australia)
7 Body unpigmented................................ L. lignorum (Fabricius, 1793) (Europe: Albania, Austria, Belgium, Britain, Bulgaria, Croatia, Czech Republic, Denmark, Finland, France, Germany, Greece [with Crete and Dodecanese islands], Hungary, Ireland, Italy [with Sardinia and Sicily], Norway [with Faroe, Svalbard and Jan Mayen islands], Poland, Portugal Rep. of Moldova, Romania, Slovakia, Spain [with Balearic islands], Switzerland, Netherlands, Ukraine. Australia)
- Body dark blue pigmented............................................................................... L. violaceus Lubbock, 1873 (Europe: Austria, Belgium, Britain, Bulgaria, Czech Republic, Denmark, France, Germany, Hungary, Ireland, Italy, Netherlands, Norway, Poland, Portugal, Rep. of Moldova, Slovakia, Spain, Switzerland, Ukraine. Australia)