HOW TO KNOW THE IMMATURE INSECTS 



lib. Long axis oi head and mouth parts project cephalad or cepholo- 

 ventral; the antennae usually located on the head capsule near 

 the mandibles; compound eyes may be absent 12 



12a. Head longer than broad; legs of moderate length and tarsi 4-seg- 

 mented (frequently inconspicuous); color usually dirty white; exo- 

 skeleton frequently soft; ant-like in shape; live within sapwood 

 or dead wood. Fig. 62 Order ISOPTERA 



The members of this order are 

 known as termites or white ants. 

 There are about 1,900 described 

 species. The social life of the ter- 

 mites includes different types of 

 castes: the reproductive castes 

 which have functional wings, the 

 short winged forms and the wing- 

 less forms. The sterile castes are 

 divisible into workers and sol- 

 diers. 



Fig. 62. Termites: a, young queen; 

 b, young worker. 



12b. Head distinctly broader than long, tarsi 2 or 3-segmented. 



13 



13a. Proximal tarsal segments of pro thoracic leg^ as long or longer 

 than the tibia and strongly dilated (bearing openings to silk 

 glands on ventral surface); proximal tarsal segments of other 

 legs or normal size and shgpe. Fig. 63 Order EMBIOPTERA 



About 150 species have been described. These 

 insects generally avoid daylight, living beneath 

 stones or under bark, etc. Silken tunnels are al- 

 ways constructed. When disturbed in these re- 

 treats they are able to run backwards or forwards 

 with equal agility. Eggs are elongate-cylindrical 

 with a conspicuous operculum at one pole and are 

 laid in small groups. The newly hatched yoimg of 

 both sexes do not differ in any important charac- 

 ters from the female parent. 



Fig. 63. Embia major 

 Imms. 



36 



