264 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



leaving an empty skin. One or two of these closely resemble the 

 common squash-bug (Anasa, tristis De G.), but are really very 

 dissimilar, and whereas the beaks of the predaceous forms are 

 short and thick as in Fig. 223, a, those, of plant-feeders, like the 

 squash-bug, are long and slender, as in Fig. 223, b. 



Several species of ground-beetles are often found preying upon 

 the larvae and beetles, but, unlike the bugs, attack them by means 



FIG. 226. Murky ground-beetle (Harpalus caliginosus): a, its larva; 6, head 

 of larva showing mouthparts. (After Riley.) 



of their powerful biting jaws. These beetles are also exceedingly 

 beneficial in feeding upon many other injurious insects, and are 

 among the farmers' best insect friends (Fig. 227). 



Remedies. As an artificial remedy for this pest, Paris green 

 has long been proven to be both effectual and practical. For 



_ small areas it may be used dry 



by mixing it with fifty times 

 its weight of dry flour, land- 

 plaster, or air-slaked lime, 

 and should be applied while 

 the plants are still wet with 

 dew, either by a perforated 

 can, or, better, by one of the 



improved powder-guns by 

 FIG. 227. Power sprayer adapted for 



spraying several rows of plants at one means of which t W O TOWS OI 

 time. Courtesy the Bean Spray Pump Co. pl an t s may be powdered at 



once. On larger areas spraying will be found more satisfactory. 

 One pound of Paris green and 1 pound of freshly slaked quick- 

 lime to 50 gallons of water will kill all the larvae, but often 2 to 3 

 pounds are necessary to destroy the beetles. 



