Casey has examined the wings in the genus Blapstinus (an "apterous" genus), and found that the wings are extremely varied in development, according to the species; in no case, however, did they appear to be capable of giving more than a laboured and feeble flight.—Ann. New York Ac. v. 1890, p. 416.
In Eleodes, though the meso- and meta-notum are formed of delicate membrane, the wings exist as minute flaps, requiring some examination for their detection.
Ann. Nat. Hist. (4) vi. 1870, p. 314; and Ent. Mag. xxvii. 1891, p. 18.
Mitt. Schweiz. ent. Ges. iv. 1876, p. 556.
Ann. Soc. ent. France, lx. 1891, p. 447.
"On the Natural History, Anatomy, and Development of the Oil-Beetle, Meloe," Tr. Linn. Soc. xx. 1851, p. 297; and xxi. 1853, p. 167.