168 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



SiGNORETJ V. '79. — Spondiliaspis, A New Genus of Hemiptera. Bull. Soc. Ent. 



France, 1879: Ixxxv-vii. 

 '81.— Notes by Signoret. Bull. Soc. Ent. France, 1881 : clviii. 

 Slingerland, M. v. '92.— The Pear Ti-ee Psylla. New York (Cornell) Agr. Exp. 



Sta. Bull. 44, 1892. 

 '96._The Pear Tree Psylla. New York (Cornell) Agr. Exp. Sta. Bull. 108: 691-81, 



1896. (Largely a repetition of Bull. 44.) 

 Smith, J. B. '96. — Economic Entomology, 1896: 137. {Psylla pijricola.) 



'09. — Insects of New Jersey, 1909: 109. {Psylla pyricola.) 

 Stebbins, F. a. '09. — Insect Galls of Springfield, Massachusetts. Springfield Museum 



of Natural History, Bull. 2, 1909. 

 Stough, H. B. '10. — The Hackberry Psylla, Pachypsylla c.-mamma. Kansas Uni- 

 versity Science Bulletin 5: 121-165, 1910. (A treatise on the anatomy of the 



species.) 

 Strand, E. '02.— Norske Fund av Hemiptera. Ent. Tidskrift, 23: 269-270, 1902. 

 SuLC, K. '04. — Popis nove mery Psylla Dudain. sp. Acta Soc. Ent. Bohemiae, 1: 1-4, 



1904. 

 '05.— Revise Psyll skirby Dudovy. Acta Soc Ent. Bohemiae, 2: 1-4, 1905. 

 '06.— Revise Psyll skirby Dudovy, II. Acta Soc. Ent. Bohemiae, 3: 1-2, 1906. 

 '07a, — Beitrage zur Kenntniss der Psylloden. Bull. Int. Akad. d. Sciences de 



Boheme, 12: 1-9, 1907. 

 '076.— Nove zvesti o PsyMch. Acta Soc. Ent. Bohemiae, 4: 110-116, 1907. 

 '08. — Psylla Lemurica n. sp., z. Madagaskarn. Acta Soc. Ent. Bohemiae, 



5: 77-82, 1908. 

 '09a.— Trioza cockerelli n. sp. Acta Soc. Ent. Bohemiae, 6: 102-108, 1909. 

 '096. — Zur Kenntniss und Synonymie der Weiderbewohnenden Psylla-Arten. 



Wien. Ent. Zeitung, 28: 11-24, 1909. 

 '10a. — Monographia Generis Trioza Forster. Sitz. Kon. Bohm. Ges Wiss. Prag, 



1910: 1-34. 

 '106. — Uvod do Studia, Synopticka Tabulka a Synonymicky Katalog Druhu 



Rodu Psylla palaearkticki. Krai. Ceske Spolecnosti Nauk, 5: 1-46, 1910. (A 



synopsis of the genua Psylla, with synonymy.) 

 '10c. — PHspevky Ku Poznani Psyll. Ceske Akad. Cisare Frant. Josefa, 19: 1-33, 



1910; ten plates. (Descriptions and figures of Psylla.) 

 '11. — Monographia Generis Trioza Frst., II. Sitz. Kon. Bohm. Ges. Wiss. Prag, 



1911: 1-34, with 10 plates. 

 '12. — Monographia Generis Trioza Frst., III. Sitz. Kon. Bohm. Ges. Wiss. Prag, 



1912: 1-63, pis. 21-35. 

 '13. — Monographia Generis Trioza Frst., IV. Sitz. Kon. Bohm. Ges. Wiss. Prag, 



1913:1-48, pis. 36-48. 

 Targioni, T. '79. — Rendiconti Soc. ent. ital., 1879. 

 Tepper, J. G. '83. — Manna, or Lerp Insects of South Australia. Journ. Linn. Soc. 



London, 17: 109-111, 1883. 

 Thomas, C. '79.— Thomas' Third Report— Illinois, Eighth, 1879. 

 Thomas, Fr. '91. — Die Blattflohkrankheit der Lorbeerbaume. Zeit. f. Pflanzenkr., 



8: 92-93, 1891. ( Trioza alacris.) 

 Thomson, C. G. '77. — Ofversigt af Skandinaviens Chermes-Arter. Op. Ent., 8: 



844, 1877. 

 Tucker, E. S. '07. — Results of Collecting Insects in Kansas and Colorado. Kansas 



Univ. Science Bulletin, 4: 69, 1907. 

 Tyler, C. H. '95. — A Psyllid Leaf-Gall on Celtis, probably Pacliypsylla c.-pubescens 



Riley. Psyche, 7: 187-188, 1895. 



