252 MODERN CLASSIFICATION OF INSECTS. 



ferred to, containing excellent memoirs upon this insect ; as well 

 as a memoir by Miiller, upon L. hemiptera, in the fourth volume 

 of Illigers Magazine, and another memoir by M. De Loche, upon L. 

 italica (^Transact. Acad. Roy. Turin, vol. 6.). In the elytra of this 

 insect, as well as in L. noctiluca, Dr. Cams has observed the circula- 

 tion of the blood. The figure given by Panzer (Faun. Ins. Germ. 

 4-1. t. 7. c, d) as the female glowworm is that of the larva of one of 

 the Silphida^. 



The great number of exotic species, amounting to between two and 

 three hundred, has rendered it necessary to separate them into various 

 groups, of which the majority have perfect elytra and wings in both 

 sexes. Hoffmansegg accordingly detached those South American 

 species which have the male antennae composed of nearly forty joints, 

 and strongly feathered on one side (^^. 27. 9.), under the name of 

 Amydetes. In the fifth volume of the Zoological Journal, I have 

 published a memoir upon this curious genus, accompanied by descrip- 

 tions and figures of two species. In the G. Phengodes Hoffm., the 

 antennas are biplumose, and the elytra very short and narrowed to 

 the tip, covering only a small portion of the wings. The type, P. 

 plumosa F. inhabits North America, and is stated by Mr. Say to be 

 not uncommon for a short period in the autumn. Attracted by the 

 candle, it enters the house in the evening, and flies repeatedly against 

 the ceiling in its endeavours to escape {Boston Journ. Nat. Hist. 

 1835, p. 157.). Other striking variations exist in the structure of the 

 antennae in the exotic subgenus Calyptocephalus G. R. Gray, and in 

 that to which 1 would apply the name of Eucladisus {Jig. 21. lO.), 

 being the Cladophorus of Gray, but not of Guerin, which latter belongs 

 to the genus Lycus, or the Ethra of Laporte, which latter name must 

 also be rejected, being long previously employed in the Crustacea. 



More recently M. Laporte has published a revision of the genus 

 Lampyris, in which fifteen subgenera are proposed. {Ann. Soc. 

 Entomol. France, 1833.) 



The genus Drilus is not luminous ; but the disparity of the sexes 

 is even greater than in the preceding genus {Jig. 26, 12. Drilus fla- 

 vescens <? — Jig. 13. '^) The females were not described* until 



* It is evident, however, that the short notice given by Reaumur, vol. iv. p. 30., 

 referred to this insect, the sexes of which were compared by him to a hare or a sheep 

 by the side of a cow; the male having wings and elytra, but the female having no 

 vestige of either. 



