552 



HEMIPTERA. 



fied cheap petroleum, mixed with 1,000 parts of water. It 



can be introduced into holes and cracks in houses, and sprin- 

 kled on plants. The cracks of bedsteads may be 

 filled with mercury ; and benzine will also effectually 

 dislodge them, as well as boiling water. The benzine 

 may be applied by means of a surgical instrument 



Fig. 550. called the Atomizer. 

 In Syrtis the head is -small, compressed laterally, and the 



fore legs are raptorial, thus allying the genus with Reduvius. 



Syrtis (Phymata) erosa Fabr. (Fig. 556) has swollen fore legs, 



and a deep groove on the head ; it is useful in devouring 



Aphides. 



In Tingis the beak reaches to the end of the breast, and the 

 fore legs are simple, the thorax and wing-covers are spread 

 out loaf-like, and the species are of small size. T. liyaliua 

 Herrich-Schaeffer is abundant on the willow. T. liystricellus 

 Richter (Fig. 557, upper and under side, magnified twenty 

 diameters) is a Ceylonese species. It "sticks close to the 

 under side of the Bvingall leaf, and there undergoes all its 

 changes,' from the larval to the perfect state. The larvae are 

 black." (Science-Gossip, p. 84, 18G9.) 



