CIRCULARS, SECOND SERIES. Le 
No. 91. Note on the occurrence of the North American fever tick [Margaropus 
(Boophilus) annulatus) Say] on sheep. By W. D. Hunter. pp. 3. Issued 
July 3, 1907. 
No. 92. Mites and lice on poultry. By Nathan Banks. pp. 88, figs. 6. Issued 
September 25, 1907. 
No. 93, The spring grain-aphis or so-called “ green bug” (Toxoptera graminum 
Rond.). By F. M. Webster. pp. 18, figs. 7. Issued August 22, 1907. 
No. 94. The cause of American foul brood [Bacillus larve]. By G. F. White. 
pp. 4. Issued July 29, 1907. 
No. 95. (Revision of Circular No. 56.) The most important step in the control 
of the boll weevil [Anthonomus grandis Boh.]. By W. D. Hunter. pp. 8. 
Issued October 3, 1907. 
No. 96 The catalpa sphinx (Ceratomia catalpe Bdv.). By L. O. Howard and 
I. H. Chittenden. pp. 7, figs. 2. Issued December 16, 1907. 
No. 97. The bagworm (Thyridopteryx ephmereformis Haw.). By L. O. Howard 
and F. H. Chittenden. pp. 10, figs. 11. Issued. February 6, 1908. 
No. 98. The apple-tree tent caterpillar (J/alacosoma americana Fab.). By A. L. 
Quaintance. pp. 8, figs. 4. Issued January 28, 1908. 
TECHNICAL SERIES. 
No.1. Revision of the Aphelininz of North America, a subfamily of hymen- 
opterous parasites of the family Chalcidide. By L. O. Howard. pp. 44, figs. 
14. 1895. Out of print. 
No. 2. The grass and grain joint-worm flies and their allies: a consideration of 
some North American phytophagic Hurytomine. By L. O. Howard. pp. 24, 
figs. 10. 1896. Out of print. 
No. 3. Revision of the Nematinz of North America, a subfamily of leaf-feeding 
Hymenoptera of the family Tenthredinid. By C. L. Marlatt. pp. 155, figs. 
10, pl. 1. 1896. Out of print. 
No. 4. Some Mexican and Japanese injurious insects liable to be introduced 
into the United States. pp. 56, figs. 6. 1896. Out of print. 
No. 5. A study in insect parasitism: a consideration of the parasites of the 
white-marked tussock moth [Hemerocampa (Orgyia) leucostigma S. & A.], 
with an account of their habits and interrelations, and with descriptions of 
new species. By L. O. Howard. pp. 57, figs. 24. 1897. Out of print. 
No. 6. The San Jose scale [Aspidiotus perniciosus Comst.] and its nearest 
allies. A brief consideration of the characters which distinguish these closely 
related scale insects. By T. D. A. Cockerell. pp. 31, figs. 15. 1897. Out 
of print. 
No. 7. Revision of the Tachinidse of America north of Mexico. A family of 
parasitic two-winged insects. pp. 156. 1897. (Corrected index issued De- 
cember. 1897.) Out of print. 
No. 8. Contributions to a monograph of the American Aleurodide. By A. L. 
Quaintance. The red spiders of the United States (Tetranychus and Stig- 
meus). By Nathan Banks. pp. 79, figs. 16, pls. 8. 1900. Price 10 cents. 
Postage 4 cents. 
No. 9. The life history of two species of plant-lice |[Hormaphis hamamelidis 
Fitch and Hamamelistes spinosus Shimer] inhabiting both the witch-hazel 
and birch. By Theo. Pergande. pp. 44, figs. 28. 1901. Price 5 cents. Post- 
age 2 cents. 
[Cir. 76] 
