Linnaea entomologica, iii. p. 1848, 346, pl. i.
Mem. Ac. Sci. étrang. vii. 1841, p. 582.
Linnaea entom. iii. 1848, p. 363.
Ent. Month. Mag. 1894, p. 39.
Stettin. ent. Zeit. xxvii. 1866, p. 369; this author has also sketched a classification of the larvae in P. Boston Soc. xv. 1873, p. 243.