hiiherlo confounded under the N^me of Mantis, 35 



arc the following, M.fpinofi, .v. 9. M. bifpinofa, n. 10. and M. aurlia, 

 n. 13. This lafl: is, in all probability, the male of the Phafma 

 Dracunctilus, provided it has broad forelegs, and in general flcinny 

 margins on all its legs, which may eafily be determined by infpec- 

 tion of the Lundian colleiftion in Copenhagen. The next in 

 order. Ph. llneare, is certainly at Icafi: of the fecond family, and, pro- 

 bably, the male of my Ph. Ohrtmamu The Ph.fp'mrfum and blfpino- 

 furn belong certainly to the firfl: family, and are very nearly related 

 to the Ph. atrophkum and he5lkutn. The lafl: mentioned are alfo 

 males, of which the females are, perhaps, already known. In the 

 genus Phafma^ the males in general are very clearly diftinguifhable 

 from the females. The fexual diftinftions may be taken with the 

 greateft advantage from thofe fpecies of which the males and fe- 

 males are known with perfeft certainty as belonging to each other. 

 Thefe are particularly my Ph. navium and Ph. edide. There are, 

 indeed, fomc genera in which it feems that the difference of the 

 fexes in refpeft to magnitude is only obfervable in fome fpecies, and 

 not in the genus at large. I need not go fo far as to mention that 

 in the genus Cervus, the flag, Cefvus Elaphus, is greater than the 

 hind; and, on the contrar}-, the roebuck, Cervus Capreo/us, is confi- 

 derably fmaller than the doe; fuch confiderations would carry me 

 too far from my purpofe. I will confine myfelf to infefts. Here wc 

 have the Bombyx dfpar, in which an inequality exifts between th« 

 two fexes that may be called unexampled in this genus. It were 

 ufelefs to affert that there is a natural genus among the Ghffata of 

 which the fexes are unequal in fize, and which ought to be fepa-; 

 rated from the genus Bombyx, in the fame manner as the Lucani, 

 where the fexes are of unequal magnitudes, are feparated from the 

 more proportionate Pajfali. Yet, fctting afide all thefe minutije, wc 

 may affume it as a probable hypothefis, until the contrary be clearly 

 proved, that the differences of mofl, if not of all, the other fpecies of 



F 2 Phflfwa, 



