222 SPECI r.- v>i 



The best part of this well-written review is 

 the following passage: "But when we once go 

 beyond the limits of our actual experience, the 

 question, as to the extent c.f this change, is one 

 as to which we have no data whatever, for any 

 positive conclusion, and we arc* left altogether to 

 the guidance of probabilities."- (Page 104.) 



And now, a few remarks upnn Mr. Darwin's 

 arguments from embryology. And the first thing 

 we notice is an erroneous statement in natural 

 history. "The vermiform larvae of moths, flics, 

 beetles, ete., resemble each other much more 

 closely, than do the mature insects." All breeders 

 of lepidopterous insects which varv, must know 

 that this is not correct. The larvae, for instance, 

 of Heliothis maryinatii, which feeds on the rest- 

 harrow, (Ononis sjrinosa,) in autumn, diller so 

 much from each other, that you may easily } i-,-k 

 out three groups, which an entomologist wl;<> 

 did not know the larva, would arrange into at 

 least three different species; but the peii'ect. in- 

 sect never varies appreciably, except in size. 



My friend, the Kev. H. H. Crewe, a gentleman 

 well known among entomologists, for his ex- 

 tensive and accurate knowledge of the Iarva3 of 

 lepidoptera, sends me the following list, which 

 differ more than do the perfect insects; th< se 

 with an asterisk exhibit strong and marked 

 varieties: A. galatcea, A. atropos, Fm. yopuli, 

 C/t. elpenor, D. coryli, T. cratcegi* N. camelina } 

 N. dictcea* N. drornedarius, JJ. cceruleocephala, 

 A. Icjorina, L. lythargyria, M. brassica, M. 



