PLATE XXIV. 



Class TRACHEATA. 



INSECTA. 



THE COCKROACH (Periplaneta (Blotto) orientalis). 

 FIG. 1. MALE, x 1. 

 FIG. 2. FEMALE, x 1J. 

 FIG. 8. YOUNG, x 1|. 

 FIG. 4. VENTRAL VIEW, x 1 J. 



FIG. 5. HEAD : ANTERIOR VIEW, x 6. 



eg. epicranial suture : w. white spot (fenestra) : an. antenna : e. eye : 

 c. clypeus. 



FIG. 6. HEAD : POSTERIOR VIEW, x 6. 



t. tracheae : o. oesophagus : n. nerve cord : s. salivary duct : s. m. sub- 

 mentum : m. mentum : I. ligula : p. paraglossa. 



FIG. 7. HEAD, WITH UPPER LIP AND UPPER JAWS : ANTERIOR VIEW, x 6. 

 /. labrum : m. mandible. 



FIG. 8. LOWER LIP AND LOWER JAWS, x 6. 



s.m. sub-mentum: m. mentum: 1. p. labial palp. (These parts con- 

 stitute the labium.) 



c. cardo : s. stapes : 1. lacinea : g. galea : m. p. maxillary palp. (These 

 constitute the maxilla.) 



FIG. LEG. x 3. 



c. coxa : tr. trochanter : /. femur : tl. tibia : ts. tarsus. 



