404 THE CANADIAN ENTOMOLOGIST 



each bearing a hair on inner side. Legs, antennae and rostrum 

 white tinged with brown, otherwise similar to those of preceding 

 stage. 



Fourth Nymphal. Stage. — Length L31 mm. Greatest width 

 exclusive of spines 0.71 mm. Shape oval. Colour dark brown, 

 fine V-shaped light line on .median dorsal surface of head, con- 

 nected with fine median dorsal line extending through the pro- 

 thorax and broadening to a light spot extending to posterior 

 margin of 2nd abdominal segment. Lateral posterior margin of 

 prothorax and lateral margins of first three abdominal segments 

 light. A small, light, dorsal median spot on 8th abdominal seg- 

 ment. Lateral tubercles and all spines light. Antennae, legs, 

 rostrum and median portion of ventral surface light. Lateral 

 margins of pro- and mesothorax lobed. Lobes of mesothorax ex- 

 tending beyond posterior margin of first abdominal segment. 

 Head with pair of spines on front, tubercle on vertex bearing a 

 pair of spines with a smaller one anteriorly and posteriorly, pair 

 of tubercles on dorsal surfate bearing one prominent and five 

 smaller spines. Prothorax bearing a pair of dorsal median spines 

 and a smaller pair posterior to them. Mesothorax bearing pair 

 dorsal tubercles each bearing a spine and posterior to the spine 

 two hairs and a smaller spine. Other tubercles and spines of 

 dorsal surface similar to but more pronounced than those of pre- 

 ceding stage. Prothorax with two minute and one larger spine on 

 anterior lateral margin and one large and three smaller spines on 

 outer angle of lobe. Tubercle on lateral margin of mesothorax 

 bearing three spines and two hairs and anterior to tubercle are 

 two spines on the lateral margin. Lateral margins of abdominal 

 segments beginning with the second, each bearing a spine on 

 tuberculate base and an inner side of each spine, a hair. Begin- 

 ning with the fourth abdominal segment, there is an additional 

 spine below each lateral spine. Antennae one-third to one-half 

 the length of the body. Rostrum extending to abdomen. 



Fifth Nymphal Stage. — Length L9 mm. Greatest width 

 exclusive of spines L2 mm. Broadly oval, sides flattened. Colour 

 dark brown except following portions which are light; legs, an- 

 tennae, rostrum, majority of spines and tubercles, fine V-shaped 



