116 THE AGRICULTUBAL PESTS OF INDIA. 



infected grain is examined a year after harvest, they will 

 be found matted together in an entangled mass, appar- 

 ently torpid, but showing no signs of death or decay. 

 This would seem to indicate that their life in the wheat 

 grain is only one chapter of their history. 



The worms have since been identified as belonging to 

 the order Nematoidea, and are apparently of the genus 

 Tylenchus. They issue from the infected grain when 

 sown, and attack the growing corn, gaining admission 

 into the flowers, when as yet undeveloped, preventing the 

 development of the grain, and producing in its place a 

 green gall (mistaken for the grain above) in which they 

 reside.- 1 Vern. Gandum, Gfehun. D. & F. 



Trombidiidae. Species of this section attack in swarms 

 the poppy seed in the granaries and store pots, reducing 

 it to chaff and dust, and their excreta gluing the seed 

 together in pellets more or less bulky. It looks like a 

 minute spider, being not more than a line in length, 

 shiny, and of a rich claret colour. It multiplies with 

 great rapidity. A little powdered camphor sprinkled 

 among the store pots is an effectual preventive. J. Scott. 

 See Acarina, Tetranichidre. 



Uredo segetum, a parasitic fungus, known as ' smut.' 

 Ustilago sacchari, sugar - cane smut, of Natal, an 

 analagous disease to the smut of wheat and maize. 



VespidsB. The family of hymenopterous insects com- 

 monly known as wasps. The principal genera are Vespa, 



