920 LIST OF HOMOPTEROUS INSECTS. 



41. PSYLLA GBAMINIS. 



Chermes Airae-flexuosae, Linn. Syst. Nat. ii. 737, ] . Faun. Suec. 



1001. 

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



Ent. Syst. iv. 221, 1. Syst. Rhyn. 303, 1. Gmel. Ed. Syst. 



Nat. i. 4, 2211, 2. Berk. Syn. i. 121. Stew. El. Nat. Hist. ii. 



111. Turt. Syst. Nat. ii. 710. 



a. ? 



42. PSYLLA NIGRITA. 



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

 Lapland. 



43. PSYLLA PULCHRA. 



Chermes pulchra, Zett. Ins. Lapp. 309, 1 0. 

 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. Psylla subfasciata. 

 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? Cerastii. 



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

 Fabr. 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. 



