THE QUINARY SYSTEM. 451 



6. With four unequal wings (HymenopteraJ. 



a, Borers (Terehrantia). 



h, wasps, bees, ants, &c. 



c, ruby tails, &c. 



7. stylops (Strepsiptera). 



II. Insects with Suckers (HaiisteUata). 



1. With powdery wings (Lepidoptera). 



a. Butterflies appearing by day (Diurna). 



h, Moths appearing at twilight (Crepuscularia). 



c. Moths appearing in the afternoon (Pomeridiana). 



d. Moths appearing at night (Nocturna). 



e. Moths appearing partly by day (Semidiurna). 



f. Moths appearing in the evening ( Vespertina). 



2. With two wings (Dlptera) 



3. With elonged jaws and two wings, or none ( Homaloptera). 



4. With wings not perceptible — fleas (Aphaniptera). 



5. Without wings (Aptera). 



6. With two wings and overlapping wing-eases (Hemiptera). 

 a, Land insects (Terrestria). 



h. Water insects (Aquatica). 



7. With two wings and wing-cases not overlapping each otlier 



(HomopteraJ. 



The Quinary System. 



Mr. W. S. MacLeay, the author of this system, proposes 

 to arrange insects in circular groups of fives, so as to place 

 those which have the nearest resemblance, or (as he terms 

 it) affinity, contiguous to one another in their several circles. 

 We shall here give from the Horse Entomologicae his ar- 

 rangement of Clairville's Mandibulata, with translations, &c. 

 of his terms (see p. 452). 



Insects have also been divided according to the condition 

 of their food ; but the arrangements on this principle have 

 not, as far as we know, been perfected. 



I. Insects feeding on Living substances (Thalerophaga). 



1. Feeding on living flesh {Carnivora). 

 a. Feeding on aphides (ApMdivora). 



2. Feeding on growing vegetables (Phyfophaga). 

 a. Feeding on grain and seeds (Granlvora). 

 h. Feeding on fungi (Fimglvora). 



II. Insects feeding on Dead substances {Saprophaga). 



1. Feeding on dead wood (Ligmvnra). 



2. Feeding on dung {Copropliaga). 



3. Feeding on dead animals (Necrophaga). 



