- err. Ses 
(SCR) 
ADDITIONS TO THE LIBRARY 
DurRING THE YEARS 1920-21. 
AckErMAN (A. J.). Two Leaf-hoppers injurious to Apple Nursery Stock 
(Empoasca mali and Empoa rosae). 
[U. S. Dept. Agric., Bull. 805, Washington, 1919. ] 
Arnsuigz (C. N.). The Western Grass-stem Sawfly. 
LU. S. Dept. Agric., Bull. 841, Washington, 1920.] 
Axvpricu (J. M.). European Frit-fly in North America. 
(Journ. Agric, Research, Washington, Vol. X VIII, 1920.] 
[See Duzer (M.C. Van).] 
ALEXANDER (C. P.), Diptera of the Super-family 7%puloidea found in the 
district of Columbia, 
(Proc. U. S. Nat. Mus. Washington, Vol. LVITI, 1920.] 
Anrxwerigut (J. A.) and Bacor(A.). A Bacillary Infection of the Copulatory 
Apparatus of Pediculus humanus. 
[Parasitology, Vol. XIII, No. 1, Cambridge, 1921.] 
———, Arkin (E. E.), and Bacor (A.). An Hereditary Ricketts¢a-like 
Parasite of the Bed-bug (Cimex lectularius). 
[ Parasitology, Vol. XIII, Cambridge, 1921. ] The Authors. 
Arno p (George). A Revision of the South African Species of the Genus 
Sphea, Lin. (olim Ammophila, Kirby). 
ATKIN (E. E.). [See Arxwricut (J. A.).] 
Avurivitiius (Chr.), Eine neue Bienen-Art aus Nord-Schweden. 
[Ent. Tidskr, Stockholm, Vol. XXXV, 1914.] 
Filip Trybom (Obit. Notice). 
[Ent. Tidskr. Stockholm, Vol. XXXV, 1914.] 
———— Neu oder wenig bekannte Coleoptera Longicornia, 14. 
[Arkiv for Zool. Stockholm, Band 8, 1914. | 
Sven Lampa (Obit. Notice). 
[Ent. Tidskr. Stockholm, Vol. XXXVI, 1915. | 
Diagnosen neuer Lepidopteren aus Africa, 10. 
[Arkiv for Zool. Stockholm, Band 10, 1916. ] 
Neue oder wenig bekannte Coleoptera Longicornia, 16. 
[Arkiv for Zool. Stockholm, Band 10, 1916. ] 
———— Neue Cerambyciden aus der Sammlung G. van Roon. 
[‘Tijds. voor Ent. Stockholm, Deel LIX, 1916. 
-—_—-— Results of Dr. E. Mjoberg’s Swedish Scientific Expeditions to 
Australia, 1910-13. 12, Cerambycidae. 
[Arkiv for Zool. Stockholm, Band 10, 1917.] 
———- — Svensk Insektfauna. 1. Gaddsteklar, Aculeata (Vespidae, Scoliidae, 
Mutillidae, Sapygidae). 
[Entomologiska Foreningen i Stockholm, Uppsala, 1918. } 
——— Svensk Insektfauna. 2. Ratvingar, Orthoptera. 
[Entomologiska Féreningen i Stockholm, Uppsala, 1918. ] 
———— Godfred Agaton Adlerz (Obit. Notice). 
[Ent. Tidskr. Stockholm, Vol. XL, 1919.] 
-—-—— Wissenschaftliche Ergebnisse der Schwedischen entomologischen 
Reise des Herrn Dr. A. Roman in Amazons, 1914-15. 
[Arkiv Zool. Uppsala, Band XII, 1919.] 
———— Eine neue Papilio-Art (P. mérnert). 
[Ent. Tidskr. Stockholm, Vol. XL, 1919.] 
——_—— Neue oder wenig bekannte Coleoptera Longicornia, 17. 
[Arkiv Zool. Uppsala, Band XIII, 1920 ] 
