CULEX. 



139. Egg. Draw an egg as seen under the microscope, showing : egg- case 

 >perculum ; developing larva. 



Examine and draw the demonstration of an egg-mass. 



140. Larva. Examine both the living specimen and prepared slide. Draw : head, 

 with mandibles, brushes, maxillary palps, antennas ; thorax ; abdomen, with eight segments; 

 anus ; respiratory siphon ; insidp the body, alimentary canal, heart, and two tracheal 

 trunks. 



141. Pupa. Examine both the living specimen and prepared slide. Make a drawing 

 to show : fused head and thorax, with respiratory trumpets ; abdomen of nine segments, 

 with paddles on segment 8. Also eyes, proboscis, wings and legs of adult, seen through 

 the pupal skin 



Examine the demonstration slide showing an adult emerging from its pupal case. 



