INJURIOUS INSECTS OF 1904. 

 The Angoumois Grain Moth. 



Fig. 17. — Angoumois Grain Motli, Sitotroga cerealella: a, eggs; h, larva at work; c, larva, 

 side view; d. pupa; e, moth; f, same, side view. — F. H. Chittenden, Division of Ento- 

 mology, U. S. Department of Agriculture. 



This pest is shown in Fig. 17. It is named from a province in 

 France, where is has been known since 1736. It is claimed to have 

 been found in America since 1728. More injurious in the South 

 than in the North, it attacks not only wheat in the field and bin, 

 but is partial to all the cereals. It is a brownish moth, resembling 

 in a general way the Clothes Moth in size and appearance. 



The Indian Meal Moth. 



This insect, resembling somewhat the 

 Mediterranean Flour Moth, not only 

 feeds upon grain, flour, meal and bran in 

 mills, but is seen in stores and elsewhere, 

 where it affects spices, herbs, roots, 

 seeds, dried fruit, etc. 



The larvse or "worms" which produce 

 these moths fasten together the kernels 

 of grain, or the seeds or other material 

 upon which they are feeding, with silken 

 threads. These masses, fouled with their 

 excrement, greatly impair the value of 

 the infested foodstuffs. It is said to have 

 from four to six or nine broods annually, 



depending upon the temperature of the rooms where it is found. 



It is shown in its various stages in Fig. 18. 



Fig. 

 a, 



a~ 



18. — Plodia interpunctella: 

 larva; b, pupa; c, adult 

 male, enlarged; d, head and 

 thoracic joints of larva, still 

 more enlarged. — Riley and 

 Howard in Insect Life. 



