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HOW TO KNOW THE INSEQS 



Fig. 65. The San Jose Scale, (a. c, d 

 and e, females; b and g, males; 

 Aspldlotus pernlclosus Comst. 



Female scale round, gray, with raised 

 center reddish yellow. Diameter about 

 2 mm. Male scale black oblong, about 

 1 mm. long. Mature female Insect yellow- 

 ish, wingless, legless, does not leave 

 scale, but gives birth to living young. 

 A'ale adult yellow, two-winged, active. 

 (From U.S.D.A.) 



These rather Inconspicuous Insects 

 are exceedingly destructive especially 

 to fruit and to green house plants. They 

 are cosmopolitan In their distribution. 

 A few species furnish valuable commer- 

 cial products such as cochineal, shellac, 

 etc. 



Figure 65, 



29b Well developed legs; sucking beak arising at front of head 

 and held between the legs. (True bugs) Fig. 66. 



Order XVII, HEMIPTERA p. 76 



Fig. 66. Nab Is subcoleoptratus Kby. 



Subdepressed. Shiny jet black. Edge 

 of abdomen and legs yellowish. Wings very 

 short. A fully winged form occurs, but 

 Is rare. Length 9-12 mm. 



Not only this family (Nabldae) but the 

 Clmicldae, Lygeldae and Gerrldae also con- 

 tain some flightless forms of Hemlptera. 

 In some cases both winged and "wingless" 

 forms occur In the same species. 



Figure 66. 



