44 THE BEAN THRIPS. 
A simpler formula and one that possibly will act quite as well on 
this insect, where it is exposed on the foliage, and one that will offer 
no chance for the burning of the foliage, has given good results in 
the destruction of Heliothrips rubrocinctus Giard in Florida. Mr. 
Edward Simmonds, of the Bureau of Plant Industry, advised the 
writer that a solution composed of 1 gallon of blackleaf tobacco ex- 
tract, 1 pound of whale-oil soap, and 50 gallons of water gave excel- 
lent results in treating trees infested by this insect. This formula 
seems a little strong to the writer and he would recommend using the 
blackleaf at the rate of 1 part to 60 parts of water. In the place of 
this, a 40 per cent solution of nicotine can be substituted at the rate 
of 1 part to from 1.000 to 2,000 parts of water. 
DISTRIBUTING THE PARASITE. 
Possibly the parasite of this insect can be artificially distributed 
with good results to sections infested by this thrips where the para- 
site does not occur. For directions and methods of shipping this 
parasite, the reader is referred to Technical Series 23, Part II, Bureau 
of Entomology. U. S. Department of Agriculture, page 51. 
BIBLIOGRAPHY. 
1. Pergande, Theodore. — Insect Life, vol. 7, pp. 391-392, 1895. 
Original description of the species. 
2. Uzel, J.— Mori, der Orel. Thysan., p. 459. 1895. 
Copy of the original description of Pergande. 
3. Hinds, W. E.— Proe. U. S. Nat. Mus., vol. 26, pp. 174-175, 1902. 
Redescription of single female. 
4. Daniel, S. M.— Ent. News, vol. 15, p. 294, 1904. 
This author seems to have taken Pergande's records of locality and host 
of this insect. 
5. Daniel, S. M.— Ent. News, vol. 15, p. 297, 1904. 
Described the male as a new species under the name Caliothrips woodicorthi. 
0. Moulton. Dudley.— Tech Ser. 12, Bur. Ent., U. S. Dept. Agr., pp. 39. 43. 
51, 52. PL II, figs. 12-14, 1907. 
Records capture on orange, pea vines, and wild vetch and places CaHothrips 
woodicorthi as a synonym of H. fasciatus. 
7. Crawford. D. L.— Pomona Jonrn. Ent.. vol. 1, pp. 120-121, 1909. 
Records this species from pine foliage, Lotus fjlaoer, and blossom end of 
ripe apple in southern California. 
8. Bremnee, O. E. — Destructive insects and their control. <Cal. State Coram. 
Hort., 1910. 
This thrips, under the name Euthrips fasciatiiSj was recorded as injuring 
peas and beans and occurring on alfalfa and peach and pear trees. 
9. Coit, J. Eliot, and Packard, W. E.— Cal. Agr. Exp. Sta., Bui. 210, pp. 168, 
184, 1911. 
This thrips, under the name Heliothrips fascietus (sic), recorded as injuring 
alfalfa and cotton in the Imperial Valley, Cal. 
10. Moulton, Dudley.— Tech. Ser. 21, Bur. Ent, U. S. Dept. Agr., pp. 9. 14, 
23-24. 
Notes on synonymy and food plants. 
