920 LIST or HOMOPTEROUS INSECTS. 



41. PsYLLA Gram IMS. 



Chermes Airee-flexuosgB, Linn. Syst. Nat. ii. 737, 1 . Faun. Suec. 



1001. 

 Chermes graminis, Fahr. Sp. Ins. ii. 390, 1. Mant. Ins. ii. 317, 1. 



Fnt. Si/st. iv. 221, 1. Syst. Rhyn. 303, 1. Gmel. Ed. Syst. 



A^ai.i. 4, 2211,2. Berk. Syn.i.\2\. Steiu. EL Nat. Hist.n. 



111. Turt. Syst. Nat. ii . 7 1 0. 



a. ? 



42. PsYLLA NIGEITA. 



Chermes nigrita, Zett. Faun. Lapp. i. 556, 9. Ins. Lapp. 309, 9. 

 Lapland. 



43. PsYLLA PULCHRA. 



Chermes pulchra, Zett. Ins. Lapp. 309, 10. 

 Lapland. 



44. PsYLLA ELEGANTULA. 



Chermes elegantula, Zett. Ins. Lapp. 310, 11. 

 Lapland. 



Note. — The following species may not belong to the genus 

 Psylla as it is defined by Foerster. 



45. PSTLLA STJBFASCIATA. 



Psylla subfasciata, Erichson, Arch. 1842, i. 286. 

 Van Diemen's Land. 



46. Psylla luteola. 

 Psylla luteola, Erichson, Arch. 1842, i. 286. 

 Van Diemen's Land. 



47. Psylla? Cerasth. 



Chermes Cerastii, Linn. Syst. Nat. ii. 737, 3. Faun. Svec. 1003. 

 Fahr. Sp. Ins. ii. 390, 4. Mant. Ins. ii. 317, 4. Ent. Syst. iv. 

 221, 4. Syst. Rhyn. 303, 4. Gmel. Ed. Syst. Nat. i. 4, 221 1, 

 3. Stew. El. Nat. Hist. ii. 111. Turt. Syst. Nat. ii. 710. 



Europe. 



