When we were at Bahia, an elater or beetle (Pyrophorus luminosus, Illig.) seemed the most common luminous insect.    From Wordnik.com.  [Journal of researches into the geology and natural history of the various countries visited by H.M.S. Beagle] Reference

I amused myself one day by observing the springing powers of this insect, which have not, as it appears to me, been properly described. 15 The elater, when placed on its back and preparing to spring, moved its head and thorax backwards, so that the pectoral spine was drawn out, and rested on the edge of its sheath.    From Wordnik.com.  [Journal of researches into the geology and natural history of the various countries visited by H.M.S. Beagle] Reference

Persons viciously inclined, want no wheels to make them actively vicious; as having the elater and spring of their own natures to facilitate their iniquities.    From Wordnik.com.  [Christian Morals] Reference

In the marshy districts is seen the large elater, which displays both red and green lights; the red glare, like that of a lamp, alternately flashing on the beholder, then concealed as the insect turns his body in flight, but the ruddy reflection on the grass beneath being constantly visible as it leisurely pursues its course.    From Wordnik.com.  [The Western World Picturesque Sketches of Nature and Natural History in North and South America] Reference

5 The elater, when placed on its back and preparing to spring, moved its head and thorax backwards, so that the pectoral spine was drawn out, and rested on the edge of its sheath.    From Wordnik.com.  [Chapter II] Reference

Now, if we understand by motive (elater animi) the subjective ground of determination of the will of a being whose reason does not necessarily conform to the objective law, by virtue of its own nature, then it will follow, first, that not motives can be attributed to the Divine will, and that the motives of the human will (as well as that of every created rational being) can never be anything else than the moral law, and consequently that the objective principle of determination must always and alone be also the subjectively sufficient determining principle of the action, if this is not merely to fulfil the letter of the law, without containing its spirit.    From Wordnik.com.  [The Critique of Practical Reason] Reference

Wake up, my heart, elater.    From Wordnik.com.  [Paul Gerhardt as a Hymn Writer and his Influence on English Hymnody] Reference