150 
MEMBRA CJDJE. 
GENERA OF DARNING. 
Species 
in B.M. 
Genera. 
Author 
Equivalents. 
Species 
described. 
1 
Proterpia 
Stal. 
Hemiptycha 
1 
29 
Aconophora 
Fairm. 
51 
Entaphinus. 
n-g. 
1 
3 
Hyphseus 
Stal. 
Darnis, Thelia 
2 
3 
Hemiptycha 
Fairm. 
4 
1 
Nessorhinus 
Fairm. 
1 
3 
Eualthe 
Stfil. 
Hemiptycha 
Smilia, Thelia 
5 
5 
Cymbomorpha 
Stal. 
3 
1 
Argante 
stal. 
Hemiptycha 
1 
10 
Heteronotus 
Lap. 
Germ. 
Ranatra, Combophora 
9 
? > 
Combophora 
Smilia .... 
G 
13 
Heniconotus 
Still. 
Heteronotus, Combophorus . 
Anchostrotus 
n-g- 
9 
Smiliorhachis 
Fairm. 
Ceresa .... 
4 
Scaphula 
Fairm. 
3 
4 
Rhexia 
Stal. 
6 
Bubalopa 
Stab 
Hemiptycha 
2 
Paradarnoides 
Fowl. 
1 
Hygris 
Stal. 
1 
1 
Nassunia 
Stal. 
Smiliorhachis 
7 
1 
Darnoides . 
Fairm. 
Smilia (Horiola?) 
8 
1 
Ilia 
Stal. 
Darnoides? .... 
5 
Aulacotropis 
Stal. 
Cymbomorpha 
i 
Tetaranthe . 
Fowl. 
i 
2 
Eumela 
Stal. 
Thelia (Walk) . 
5 
4 
Omalon ? 
Walk. 
4 
Procyrta 
Stal. 
2 
Before concluding the section Darninse, a few remarks may be allowed on the 
question of variation and its acquired faculty of imitation. Few biological subjects 
have been more debated during the last few year.:. Though here touched upon, 
these remarks lay no claim to novelty. 
The genera Heteronotus and Combophora furnish us with some striking examples 
of mimicry which call for some consideration. 
The cause of variation may be perhaps of an abstract nature, and as such we may 
advance that, like gravitation in matter, variation is a universal law, obtaining in all 
living organisms, and possibly in all molecules. The processes of synthesis are met 
by those of analysis. Interchange and regrouping of molecules must ever be until 
stagnation—that is death, intervenes. The molecular groups constituting the body of 
an animal at birth, immediately commence a regrouping. But there is some far- 
reaching law r , which controls this organic grouping, and keeps it from passing into 
what is called the elements of the inorganic world. Living forms may be regarded 
as molecules in a condition of unstable equilibrium. 
