BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
47 
742. Howard, L. O. Nocturnal flight of grasshoppers. <Bull. No. 
22, n. s., Div. Ent., IT. S. Dept. Agric., January, 1900, p. 106. 
743. Howard, L. O. A new clothes-moth remedy. <Bull. No. 22, 
n. s., Div. Ent., U. 8. Dept. Agric., January, 1900, p. 106. 
744. Howard, L. O. Notes from correspondence. <Bull. No. 22, 
n. s., Div. Ent., U. S. Dept. Agric., January, 1900, pp. 107- 
109. 
745. Howard, L. O. The present status of the caprifig experiments irf 
California. <Proc. Amer. Pomol. Soc., 1899 (May, 1900), 
pp. 27-32. 
746. Howard, L. O. Notes on the mosquitoes of the United States. 
<Bull. No. 25, n. s., Div. Ent., U. S. Dept. Agric., August, 
1900, pp. 70, figs. 22. 
747. Howard, L. O. How to distinguish between the different mos¬ 
quitoes of North America. <Circ. No. 40, s.s., Div. Entom., 
U. 8. Dept. Agric., 1900, 8 pp., 4 figs. 
748. Howard, L. O. Regulations of foreign governments regarding 
importation of American plants, trees, and fruits. <Cir. No. 
41, s. s., Div. Ent., U. 8. Dept. Agric., September, 1900, 
4 pp ' 
749. Howard, L. O. Establishment of a new beneficial insect in Cali¬ 
fornia. <Bull. No. 26, n. s., Div. Ent., U. 8. Dept. Agric., 
October, 1900, pp. 16-17. 
Introduction of Scutellista cyanea Mots. 
750. Howard, L. O. Beneficial work of Hyperaspis signata Oliv. 
<Bull. No. 26, n. s., Div. Ent., U. S. Dept. Agric., October, 
1900, pp. 17-18, 1 fig. 
Feeding on Pulvinaria. 
751. Howard, L. O. Remarks on Psorophora ciliata Desv., with 
notes on its early stages. <Can. Entom., December, 1900, 
pp. 353-357, 3 figs. 
752. Howard, L. O. A contribution to the study of the insect fauna 
of human excrement, with especial reference to the spread of 
typhoid fever by flies. <Proc. Wash. Acad. Science, Decem¬ 
ber, 1900, pp. 541-600, 2 pis., 22 figs. 
753. Howard, L. O. On some Diptera bred from cow-manure. <Can. 
Entom., February, 1901, pp. 42-44. 
754. Howard, L. O. To destroy the imported elm bark-louse. <Mee- 
han’s Monthly, May, 1901. 
755. Howard, L. O. Fighting the borers. <American Gardening, 
' 22 June, 1901, p. 448. 
756. Howard, L. O. The carriage of disease by flies. <Bull. No. 
30, n. s., Div. Ent., IT. 8. Dept. Agric., October, 1901, pp, 
39-45, 6 figs, 
