Character;"Pyractonema nigripennis Solier";"Pyropyga nigricans (Say)";"Lucidota atra Olivier";"Lucidina accensa Gorham";"Phosphaenus hemipterus (Goeze)";"Photinus extensus Gorham" "Body shape";"Narrow, parallel 5.7–6.1× longer than narrow";"Narrow, parallel";"Narrow, parallel";"Wide, suboval 4.2× longer than narrow";"Oblong and narrow ~4.5× longer than narrow";"Narrow, parallel ~5× longer than narrow" "Ratio: body length/thoracic length";2.8–3.1;3.4–3.7;3.4–3.7;2.6;3.14;2.9 "Cephalic capsule";"Short and wide, retractable into the thorax";"Short and wide, retractable into the thorax";"Short and wide, retractable into the thorax";"Subquadrate, moderately flattened dorso-ventrally.";"Rectangular, retractable into the thorax";"Short and wide, retractable into the thorax" Antennae;"Wide, partially retracted into the head";"Wide, partially retracted into the head";"Wide, partially retracted into the head";"Long and thin, completely retracted into the head";"Long and thin, partially retracted into the head";"Long and thin, partially retracted into the head" "Opening of the mandible channel";"At the exterior margin, subapical";"At the exterior margin, subapical";"At the exterior margin, subapical";"At the exterior margin, subapical";"At the exterior margin, subapical";"At the exterior margin, subapical" "Number of retinacula of the mandible";1;1;2;4;1;1 "Maxillar palp";"Three palpomere";"Three palpomere";"Three palpomere";"Two palpomere";"Tew palpomere";"Four palpomere" "Shape of pronotum";subcircular;subcircular;subcircular;subcircular;subcircular;suboval "Shape of mesonotum";"sub oval";"sub oval";"sub oval";trapezoidal;"sub oval";rectangular "Shape of metanotum";"sub oval";"sub oval";"sub oval";rectangular;"sub oval";rectangular "Thorax color";"Dark with three pale, longitudinal, and subparallel lines";"Dark with three pale, longitudinal and subparallel lines";"Dark with three pale, longitudinal and subparallel lines";"Almost blackish brown, lateral and hind margins more or less paler than the ground Subrectangular";"dorssally dark reddish-brown, ventrally pink/ochre/light brown with darker plates on laterotergites and sternum";"Dark, with pale stripes" "Shape of the abdominal tergites";"Subrectangular, except VII–IX subsquared";Suboval;"Suboval, posterior margin of tergites V–VIII straight";Subrectangular;"I–VII, IX subrectangular, VIII suboval";Subrectangular "Abdomen color";"With a clear line on each side. Dark segments VII–IX.";"Dark with pale lateral areas (segments I–VIII)";"Dark with three pale longitudinal and subparallel lines, at the inner interior margin";"Almost blackish brown, lateral and hind margins more or lesspaler than the ground I–VI, segments VII–X pale yellowish to milky white";"pink/ochre/light brown";"Pale with a little pink stripe in the second third in segments I–V, the rest of them pale"