44 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
532. Howard, L. O. Additional observations on the parasites of 
Orgyia leucostigma. <Bull. No. 9, n. s., Div. Ent., U. S. 
Dept. Agric., 1897, pp. 5-18. 
533. Howard, L. O. Temperature experiments as affecting received 
ideas on the hibernation of injurious insects. <Bull. No. 9, 
n. s., Div. Ent., U. S. Dept. Agric., 1897, pp. 18-19. 
Experiment of cold storage company. 
534. Howard, L. O. A useful American scale insect. <Bull. No. 
9, n. s., Div. Ent., IT. S. Dept. Agric., 1897, pp. 38-40. 
Notes on Cerococcus quercus. 
535. Howard, L. O. The Mexican cotton-boll weevil. <Cir. No. 
18, s. s., Div. Ent., U. S. Dept. Agric., March, 1897, pp. 8, 5 
figs. Also German and Spanish editions. 
A revision of No. 14. 
536. Howard, L. O. A study in insect parasitism. <Bull. No. 5, 
Tech. Ser., Div. Ent., U. S. Dept. Agric., April, 1897, pp. 57, 
24 figs. 
A consideration of the parasites of Orgyia leucostigma. 
537. Howard, L. O. The injurious insects of 1896 and the prospects 
for 1897. '<Gentleman Farmer, May, 1897, pp. 389-396, 
12 figs. 
538. Howard, L. O. The desirability of an inspection system against 
foreign insects. <Proc, Natl. Conv. for the repression of 
insect pests and plant diseases by legislation. l T . S. Dept. 
Agric., August, 1897, pp. 11-12. 
539. Howard, L. O. The gipsy moth in America. <Bull. No. 11, 
n. s., Div. Ent., IT. S. Dept. Agric., December, 1897, pp. 39,8 
figs. 
A summary account of the introduction and spread of Porthetria dispar in 
Massachusetts and of the efforts made by the State to repress and exter¬ 
minate it. 
540. Howard, L. O. Mosquitoes and fleas. <Cir. No. 13, s. s., Div. 
Ent., U. S. Dept. Agric. Revised edition, December, 1897, 
pp. 4. 
541. Howard, L. O. Report of the entomologist for 1897. <Rept. 
Seer. Agric. f. 1897 (December, 1897), pp. 111-116. 
542. Howard, L. O. A new parasite of the harlequin cabbage bug. 
<Can. Entom., January, 1898, pp. 17-18. 
543. Howard, L. O. The Mexican cotton-boll weevil in 1897. <Cir. 
No. 27, s. s., Div. Ent., U. S. Dept. Agric., January, 1898, 
pp. 7. 
Progress of Anthonomus grandis. 
544. Howard, L. O. On some parasites of Coccidte; with descrip¬ 
tion of two new genera of Aphelininse. <CProc. Ent. Soc. 
Wash.,IV, February, 189 , pp. 133-139. 
