4 INSECTS AFFECTING STORED PRODUCTS, 
BOSTRYCHHXE. 
20. Dinoderus truncatus Horn Chittenden: Insect Life, Div. Ent., U. S. 
Larger grain borer. Dept. Agr., vol. 7, p. 327, 1895. 
Breeds in corn and edible tubers. 
21. Rhizopertha dominica Fab Injurious to cereals in kernel; breeds in 
Dinoderus dominica Fab. corn, rice, wheat, and in other hard sub- 
Dinoderus pusillus Fab. stances containing starch. 
Rhizopertha pusilla Fab. 
Lesser grain borer. 
PTINID^E. 
22. Ptinus fur L Bui. 4, n. s., Div. Ent., U. S. Dept. Agr., 
White-marked spider beetle. p. 127, 1899. 
Injurious to flour, crackers, seeds, etc. 
23. Ptinus brunneus Dufts Occurs in same situations as the above, and 
Brown spider beetle. as its habits are practically identical it 
probably feeds also on cereals. 
24. Niptus hololeucus Fald Fitch (Powers): The Entomologist, vol. 12, 
p. 46, 1879. 
In "corn meal;" common in granaries in 
Europe. 
25. G-ibbium psylloides Czem Schwarz (unpublished). 
Gibbium scotias Fab. In stale bread in a bakery at Washington, 
D. C; in storehouses, etc. 
26. Sitodrepa panicea L Bui. 4, n. s., Div. Ent., U. S. Dept. Agr., 
Anobium paniceum L. pp. 124-126, 1899. 
Drug-store beetle. A general feeder. 
27. Lasioderma serricorne Fab Bui. 4, n. s., Div. Ent., U. S. Dept. Agr., 
Lasioderma testaceum Dufts. p. 126, 1899. 
Cigarette beetle. Habits similar to above; observed to breed 
in rice, yeast cakes, fish food, etc. 
28. Catorama punctulata Lee Quaintance: Bui. 36, Fla. Agr. Exp. Sta., 
pp. 381-382, 1896. 
In corn, corn meal, flour, etc. 
29. Catorama zeae Waterh Trans. Ent. Soc. London, vol. 5, Proceed- 
Tricorynus zese, Waterh. . ings, p. lxviii, 1847-1849. 
"Attacking the grain of the common 
maize. 
TENEBRIONID^E. 
30. Tenebrio molitor L Farmers' Bui. 45, TJ. S. Dept. Agr., pp. 
Yellow mealworm. 14-15, 1897. 
Injurious to ground cereals, especially 
when stale. 
31. Tenebrio obscurus Fab Farmers' Bui. 45, U. S. Dept. Agr., p. 15, 
Dark mealworm. 1897. 
Infests ground cereals. 
32. Tenebrio tenebrioides Beauv Unpublished. 
33. Tribolium confusum Duv Farmers' Bui. 45, U. S. Dept. Agr., pp. 
Tribolium ferrugineum auct. 11-12, 1897. 
Confused flour beetle. A general feeder, injurious to cereals in 
everv form. 
