456 EXPEKIMENT STATION RECORD. 



It is stated that some species are not recorded in the present paper because 

 of the imperfect condition of the specimens and that these will be treated in 

 a future paper, together with fungi parasitic on scale insects found in other 

 parts of Japan. A list of the papers referred to is appended. 



On the development of the eg-gs of Bombyx (Sericaria) mori the first 

 month after deposition, M. Rizzi {Redia, 8 {1912), No. 2, pp. 323-359, pis. 4).— 

 The report of an embryological study of the silkworm, with a bibliography of 

 17 titles. 



Control of army worm and cotton caterpillar, E. L. Worsham {Ga. Bd. 

 Ent. Bui. 36, 1912, pp. 8, figs. 5).— A popular account. 



The wilt disease of g-ipsy moth caterpillars, R. W. Glaseb and J. W. 

 Chapman (Jour. Econ. Ent., 6 {1913), No. 6, pp. 479-488) .—The authors' experi- 

 ments and observations are summarized as follows : 



" The presence of polyhedral bodies in the blood corpuscles may be useful 

 in diagnosing the health of nun moth caterpillars, but this test can not be used 

 for gipsy moth caterpillars with any degree of certainty. The virus of wilt 

 disease is filterable with difiiculty. Such a filtrate is free from bacteria and 

 polyhedral bodies. Caterpillars dead from the infection with the filtered virus 

 are flaccid, completely disintegrated, and full of polyhedral bodies. Usually 

 the complete absence of bacteria immediately after death is very striking as 

 cultures and smears show. Minute dancing granules were observed in the 

 diseased tissue cells with very high powers. These same granules were also 

 noticed in the Berkefeld filtrate. There is no evidence that polyhedral bodies 

 are stages of the filterable virus. A large number .of caterpillars used in the 

 experiments died, due to disturbances in their normal physiological activities. 

 There is no evidence that the wind is an important factor in distributing the 

 disease. Infection naturally takes place through the mouth by means of the 

 food. Apparent immunity is a striking phenomenon." 



A bibliography of 17 titles is appended. See also a previous note (E. S. R., 

 27, p. 660). 



Notes on a chestnut tree insect, A. G. Ruggles {Science, n. ser., 38 {1913), 

 No. 989, p. 852). — These notes relate to an undetermined lepidopteran which is 

 referred to as the " bast miner " because of the habit of the larvae of burrowing 

 in the bark of the chestnut tree, particularly in smooth-barked trees. The 

 larvse hibernate in the burrows in either the second or third instar. The bur- 

 row, which extends longitudinally, is not very extensive, the longest not being 

 more than 6 in. ; it can not be detected externally while the borer is within the 

 bark, but after the emergence of the larvae the bark swells over the burrow, 

 often cracking and making a conspicuous wound. The larvie leave the trees 

 during the first part of June through minute exit holes and drop to the soil, 

 in which they spin a seed-pod-like cocoon. Under insectary conditions the 

 adult insect emerges during August. 



Since the number of exit holes made by these larvae is enormous in any 

 given area of chestnut forest and as these holes are made just at the time of 

 the year when the blight spores are very abundant and conditions generally are 

 favorable to their development, it is thought that this insect has an important 

 bearing upon the spread of Endothia parasitica. 



A list of mosquitoes hitherto reported from New Orleans, C. Wellman 

 and H. D. King {Amer. Jour. Trop. Diseases and Prev. Med., 1 {1913), No. 4» 

 pp. 267-280). — Twenty species representing 9 genera are recorded in this paper, 

 which is said to be preliminary to a systematic mosquito survey of the city 

 and environs of New Orleans, planned for the spring and summer of 1914. 

 References to the medical and zoological literature which has been searched 



