392 INSECT MISCELLANIES. 



ties (Coleoptera). 1. Pentamera; 2. Hete- 

 romera ; 3. Tetramera ; 4. Trimera. 

 by With the under wings folded lengthwise (Or- 



thoptera) . 



Legs formed for running (Cursoria). 

 Legs formed for leaping (Saltatoria). 

 c, With a sucker enclosing several bristles (He- 

 miptera). 1. Heteroptera; 2. Homoptera. 

 By Upper wings membranaceous. 



a, Wings naked and netted (Neuroptera). 1. Sub- 



ulicornes ; 2. Planipennes ; 3. Plicipennes. 



b, Wings naked and veined (Hymenoptera) . 



1. Terebrantia ; 2. Aculeata. 



c, Wings with dust-like scales (Lepidoptera) . 



1. Diurna ; 2. Crepuscularia ; 3. Nocturna, 

 With two twisted elytra and two icings (fthi- 

 piptera}. 



1. Xenos; 2, Stylops, 

 With two wings (Diptera), 



Leach's Classification. 



I, INSECTS UNDERGOING NO TRANSFORMATION (Ame* 



tab olio). 



1, With bristles at the tail (Thysanura). 



2. With no bristles at the tail (Anoplura). 



II, INSECTS UNDERGOING TRANSFORMATION (Meta- 



bolia). 



1. With two wings folded crosswise, and covered 



with hard wing-cases (Coleoptera). 



2. With two wings folded lengthwise and crosswise, 



and short and softer wing-cases (Dermaptera). 



3. With two wings folded lengthwise, apd wing cases 



overlapping each other at the edges (Orthop- 

 tera}. 



i 4, With two wings twice folded lengthwise, and 

 wing-cases obliquely overlapping ; mouth with 

 j aws , (Dictyoptera) . 



5. With two wings, and overlapping wing-cases, 



having the apex membranaceous (Hemiptera). 



6. With two wings, and coriaceous or membrana- 



ceous ^wing-cases (Omoptera). 



7. With no wings nor wing-cases (Aptera). 



