SYSTEMATIC ZOOLOGY. 1253. 
into a closely-stoppered, wide-mouthed bottle with finely- 
bruised laurel leaves. 
Ciass INSECTA. 
ANALYSIS OF THE ORDERS. 
A. Mouth masticatory, generally furnished with mandibles. 
a. Hind wings similar in texture to the 
fore wings. 
Wing veins numerous . , Neuroptera. 
Wing veins few ; labium enclosed by 
the maxille . . Hymenoptera.* 
b. Hind wings differing in texture from 
the fore wings. 
Hind wings folded longitudinally ; la- 
bium external, divided .  Orthoptera.* 
Hind wings folded transversely; la- 
bium external, single . Coleoptera. 
B. Mouth suctorial, without mandibles. 
a. Wings four. 
Wings more or less membranous ; pro- 
boscis straight ; Hemiptera. 
Wings covered with scales ; proboscis 
curled ; . Lepidoptera. 
b. Wings two Dyuptera. 
ORDER NEUROPTERA. 
ANALYSIS OF THE FAMILIES. 
A. Antenne shorter than the head. 
Hind wings nearly equal to the fore 
wings. , . Lnbellulide. 
* These orders contain apterous insects ; they may be distinguished by 
the structure of the mouth. 
