I^f JUEious Insects and How to Conteol Them. 83 



70 Croton bug {Phyllodromia germanica). The smaller, light brown roach 

 about % inch long found in houses. 



Treatment: roach poisons, such as Hooper's fatal food. Paris green 

 with sugar has been used successfully, but is a dangerous poison. Fumi- 

 gate with sulphur where possible. Entice the bugs to enter vessels partly 

 filled with stale beer, from which no escape is provided. 



71 Cockroach (Periplaneta orientalis). The larger, dark brown species, 

 an inch or more long, found in dwellings. 



Treatment: same as for the croton bug. 



Insects Affecting Stored Grains and Leguminous Seeds. 



72 Grain moth. (Sitotroga cerealella). A small caterpillar about 7-16 inch 

 long working in various grains and producing a whitish moth with a wing 

 spread of a little over y^ inch. 



Treatment: fumigate infested grain with carbon bisulfid. 



73 Saw tootbed grain beetle (Silvanus surinamensis). A small, brown 

 slender, beetle about % inch long found infesting cereals and dried food 

 products. 



Treatment: fumigate infested cereals with carbon bisulfid and allow 

 none of its food to lie long undisturbed. 



74 Indian meal moth. (Plodia inter punctella). Whitish caterpillar living 

 In Indian meal and other cereals and fastening the particles of grain 

 together with a web. Moth with the outer two thirds of fore wings red- 

 dish brown, the inner portion and hind wings light gray. 



Treatment: fumigate infested food with carbon bisulfid. 



75 Confused flour beetle (TriboUum confusum). A rather stout, shining, 

 reddish brown beetle about 3-16 inch long. Very prolific and frequently 

 causes considerable injury. 



Treatment: fumigate with carbon bisulfid and clean infested localities. 



76 Bean weevil (Bruchus obtectus). Small, grayish brown beetles about 

 Vs inch long breeding in dry beans and eating out numerous holes. 



Treatment: fumigate beans in all infested localities with carbon bisulfid 

 as soon as threshed. 



77 Pea weevil (Bruchus pisorum). Brownish or black beetles with indis- 

 tinct white markings, about 3-16 inch long, infesting peas. 



Treatment: same as for bean weevil. 



Beneficial Insects. 



78 Silkworm {Bombyx mori). Showing eggs, larva, single and double 

 cocoons, those from which moths have emerged, one from which the silk 

 has been reeled, male and female moths, raw silk; also several other 

 species of silk-producing moths. 



79 Pollen carriers. A great many insects convey pollen from flower 

 to flower and in certain cases there are some very Interesting adaptations. 

 Some of the more common pollen carriers are honey bees, biimljle or hum- 

 ble bees, other bees, wasps, flower of Syrpbus flies and many, others. 



