350 



THE CANADIAN ENTOMOLOGIST. 



The adult mite (fig. 47, c, d) is of a bright crimson colour and about 

 one-eighteenth of an inch long. When full-grown it passes to the ground, 



Fig. 47.— Trombidil'M locistarum. — (a) mature larva, when about to leave the wing of a 



locust : ( b) pupa ; ( c ) male adult fresh from the pupa ; ( d ) female — the natural sizes are 



indicated bj' the short lines on the right ; ( e) palpal claw and thumb ; f^f) pedal 



claws ; (g) a barbed hair ; (h) the striations on larval skin (after Riley). 



where it remains over winter. Dr. Riley, who has studied the life-history 

 of this mite, states that the eggs are laid an inch or so under the ground in 

 clusters containing between 200 and 400. Early in the spring from these 

 eggs emerge the young mites, which, upon reaching the surface of the 

 ground, attach themselves to their hosts. These little mites render good 

 service in checking the spread of the locusts, as almost every locust upon 

 which one is found appears to be more feeble and sickly than those which 

 have not been attacked. 



The Annual Meeting of the Entomological Society of Ontario will 

 be held at the Agricultural College, Guelph, on Wednesday and Thursday, 

 the loth and nth of October. Mr. W. D. Kearfott, of Montclair, N. J., 

 is expected to be present, as well as other members from a distance. 



CHANGE OF ADDRESS. 

 All correspondence, books, exchanges, etc., for the Entomological 

 Society of Ontario or the Canadian Entomologist, should in future be 



addressed to 



Guelph, Ontario, Canada, 



and not, as heretofore, to London, Ontario. 



