75 - PEDICULUS. 



148. Male. Examine the prepared slide of the common body-louse and draw : 

 head, with eyes, five-jointed antennae, sucking-tube ; pro-, meso-, and meta-thorax, each 

 bearing a pair of legs terminating in sharp claws ; eight abdominal segments, with 

 chitinous plates ; two pairs of thoracic spiracles a ad six lateral abdominal spiracles ; 

 anus ; copulatory apparatus ending in a large chitinous penis, often retracted. 



149. Female. Draw the posterior end of the abdomen, showing : bilobed posterior 

 extremity, caused by pair of gonopods bordering the vagina ; eggs, contained in abdomen. 



