534 



HEMIPTERA. 



broad head and prominent eyes. The males have a musical 

 apparatus beneath the wings on the basal ring of the abdomen, 



which acts like a ket- 

 tle drum, producing 

 a loud, penetrating, 

 shrill sound. Cicada 

 rimosa of Say, our 

 smallest species, be- 

 gins to be heard a 

 little before the mid- 

 dle of June. The 

 C pruinosa Say is 

 larger and appears 

 later, being an au- 

 tumnal species. Pro- 

 rig. 536. fessor A. E. Verrill 

 has observed this species in Norway, Me., laying its eggs in 

 the stems of Solidago or Golden-rod. It made a longitudinal 

 incision with ragged edges into the pith of the plant, then with 



its oviposi- 

 tor forced its 

 eggs a little 

 distance 

 down in the 

 pith below 

 the external 

 opening ; 

 there were 

 two rows of 

 eggs suc- 

 ceeding the 

 first single 

 one, each 

 pair diverg- 

 ing o u t - 

 wards, the 

 ^ig- ^37. lower ends 



of each pair nearly touching each other, and all placed very 

 near together. The habits of tlie Seventeen year locust, Cicada 



