THE CANADIAN ENTOMOLOGIST 403 



prominent consisting of a group of five ommatidia. Antenna? one- 

 fourth to one-third the length of the body, translucent, bearing 

 several hairs. Head with two minute tubercles on front each 

 bearing a hair, a divided tubercle on vertex bearing two fine hairs 

 and a pair of tubercles on dorsum each bearing a hair on tip and 

 another one posterior. A pair of median tubercles on meso- 

 thorax each bearing a hair. A pair of median tubercles on second 

 abdominal segment each bearing a hair. A pair of more promi- 

 nent median tubercles on the 5th, 6th, 8th and 9th abdominal 

 segments each bearing a single spine-like hair on the tip. Tubercles 

 on the 5th, 6th and 8th abdominal segments also bear two longer 

 spine-like hairs anterior to spine-like hair at tip. A single lateral 

 spine-like hair arising from tuberculate base on pro- and meso- 

 thorax, and all abdominal segments beginning with the second. 

 Ventral surface light; rostrum translucent, one-half the length of 

 the body; legs translucent tinged with brown, tarsi tipped with 

 pair of claws. 



Second Nymphal Stage. — Length 0.75 mm. Greatest width 

 exclusive of spines 0.4 mm. Narrowly oval to broadly elliptical, 

 posterior end obtusely round, sides margined. Colour brown, light 

 median dorsal line beginning on head and extending through the 

 pro- and mesothorax broadening into a central dorsal light spot 

 on the metathorax and the first and second abdominal segments. 

 Dorsal armature similar to that of the first stage but more pro- 

 nounced, lateral spine-like hairs becoming spines. Each lateral 

 spine on the pro- and mesothorax has a minute spine posterior to 

 it. Antennae and eyes similar to those of first stage. Median 

 portion of ventral surface light; beak translucent, one-half the 

 length of the body. Legs similar to those of first stage. 



Third Nymphal Stage. — Length LO mm. Greatest width 

 exclusive of spines 0.52 mm. Broadly oval, obtusely rounded at 

 posterior end. Colour similar to that of preceding stage but some- 

 what darker. Lateral margins of 1st and 2nd abdominal seg- 

 ments light. Dorsal armature somewhat similar to that of pro- 

 ceding stage but more prominent. Lateral tubercles of pro- and 

 mesothorax each bearing a prominent spine and four minute spines 

 surrounding it. Lateral tubercles of abdomen more pronounced, 



