44 



INJURIOUS INSECTS OF 1904. 



found it attacking dried insects in our cabinets. Like the other 

 insects under discussion, a high temp.erature invites more rapid 

 reproduction than when the temperature is low. It is said to at- 

 tack and eat the larvae of the Mediterranean Flour Moth. 





/ig. 21. — Triholhim confusum: a, beetle; b. larva; c, pupa, all enlarged; d, lateral lobe of 

 abdomen of pupa; e, head of beetle showing antenna; f, same of T. ferrugineum, all 

 greatly enlarged. — F. H. Chittenden, Division of Entomology, U. S. Department of Agri- 

 culture. 



The Slender-Horned Flour Beetle. 



This insect is more common in tlie south, but deserves a place 

 here. Indian corn is its special food. The beetle is brown, having 



Fig. 22. — Echocerus maxillosus: a, larva; b, pupa; c. adult male, all enlarged. — F. H. Chitten- 

 den, Division of Entomology, U. S. Department of Agriculture. 



on its head between its eyes, two small projections, readily seen 

 in the illustration. Fig. 22. The Broad-horned Flour Beetle, and 



