10 WORKS ON NORTH AMERICAN ENTOMOLOGY. 
Fauna Arctrica.—Edited by Romer and Schaudinn, Jena. Entomo- 
logical parts are: Collembola, by Scheffer, 1900; Lepidoptera, 
by Pagenstecher, 1901; Tenthredinide, by Kiaer, 1902; Hymen- 
optera, by Friese, 1902; Hemiptera, by Breddin, 1902; Acarida, 
by Tragardh, 1905; Aranez, Opiliones, Chernetes, by Strand, 
1906; Myriopoda, by Attems, 1906. 
SYSTEMATIC WORKS ON SINGLE ORDERS OF INSECTS. 
HYMENOPTERA. 
I.—CATALOGUES. 
Cresson, E. T.—Catalogue of species and bibliography. Part 2 of 
Synopsis of the Hymenoptera of America, north of Mexico. 
Synopsis and catalogue. <Trans. Amer. Ent. Soc., Supple- 
mentary volume, 1887. Philadelphia, 1887. 
Datta Torre, C. G. pe.—Catalogus Hymenopterorum. 10 vols. 
Leipzig, 1893-1900. . 
I, Tenthredinide ; II, Cynipidz ; III, Ichneumonide, etc.; IV, Braconide ; 
V, Chalcididse and Proctotrupide; VI, Chrysidide; VII, Formi- 
cide; VIII, Fossores; IX, Vespide; X, Apidse. Each volume can 
be purchased separately. 
Il, GENERAL WORKS ON CLASSIFICATION. 
Cresson, E. T.—Synopsis of the families and genera of the Hymen- 
optera, north of Mexico, together with a catalogue of the de- 
scribed species and bibliography. <Trans. Amer. Ent. Soc., 
supplementary volume, Part I, 1887. 
The second part contains the Catalogue of Species and Bibliography. 
IePELETIER DE SaAtntT Farceau, Compre Am&pre.—Histoire naturelle 
des insectes, Hymenoptéres. 4 vols., Paris, 1836-1846, pls. 48. 
Fourth vol. by A. Brullé. 
Fox, W. J.—A proposed classification of the fossorial Hymenoptera 
of North America. <Proc. Acad. Nat. Sci. Phila., 1894, pp. 292- 
307. 
AsuMmerap, W. H.—Classification of the horntails and sawflies, or the 
suborder Phytophaga. <Can. Ent., 1898, pp. 142-148, 177-183, 
205-213, 226-232, 249-957, 281-287. 
Classification of the bees, or the superfamily Apoidea. 
<Trans. Amer. Ent. Soc., xxv1, pp. 49-100, 1899. 
Superfamilies in the Hymenoptera and generic synopses of 
the families Thynnide, Mvrmoside, and Mutillide. <Journ. 
N. Y. Ent. Soc., 1899, pp. 45-60. 
