Illustration 22 Insects 5. Antennae very long, arising from between the eyes, Labrum heart-shaped, eyes very large, prominent; ocelli 3, the first the largest, situated between the antennae, the two others being placed on the sides of a slight groove behind them.
"Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2)"
George Grey
The Labrum forms a segment of a circle; it is reddish, edged with a small number of very short, stiff hairs.
"The Glow-Worm and Other Beetles"
Jean Henri Fabre
The Labrum is prominent, is not distinctly divided from the head, is curved in front and edged with pale and very fine bristles.
"The Glow-Worm and Other Beetles"
Jean Henri Fabre