162 



appear in the dead bodies 2 or 3 days after inoculation. The larvae 

 of Vanessa urticae are also very susceptible to this infection. They 

 die in 20 to 24 hours after the first passage, in 8 to 9 hours after the 

 second, and in 6 to 7 after the tenth. Virus of this strength will also 

 kill the larvae if given through the mouth. At the time of death 

 the microbe is relatively scarce in the blood and it therefore appears 

 to cause death by means of the toxin that it secretes. After the 

 death of the insect, the microbe continues to increase rapidly up to 

 the formation of spores. Larvae of Lymantria dispar inoculated with 

 B. hoplosternus behave in a similar manner as when inoculated with 

 Diplobacilhis. In one case inoculated larvae were all ill in 24 hours 

 after inoculation ; their blood was rich in the parasite, but they did 

 not all die ; two were still alive several days later and examination 

 of their blood showed that the Bacillus had not multiplied, nor formed 

 spores, but had assumed a modified form. Silkworms are fairly 

 resistant to the action of B. hoplosternus, only a small number of 

 those inoculated dying at the end of 48 hours. 



Froggatt (W. W.). a Descriptive Catalogue of the Scale Insects 

 ("Coccidae") of Australia. — Agric. Gaz. N.S.W., Sydney, xxvii, 

 no. 12, December 1916, pp. 883-888, 1 fig. [Received 5th 

 February 1917.] 



The species recorded include : — Pseudococcus {Dactylopius) candidus, 

 sp. n., on Acacia decurrens ; P. {D.) ericicola, Msk., on Erica autumnalis ; 

 P. (D.) grevilleae. Full., on GreviUea bipinnatifida ; P. {D.) herbicola, 

 Msk., on Aristida vagans ; P. (D.) hibbertiae, Msk., on Hibbertia 

 linearis and H. virgata ; P. (D.) hilli, sp. n., on Acacia sp. ; P. {D.) 

 lunigerus, Full., on Acacia pulchella ; P. (D.) lobulatus, Msk., on 

 Eucalyptus; P. {D.) longispimis, Targ., on Acacia longifolia and 

 thistle ; P. (D.) macrozamiae, Full., on Macrozamia frazieri ; P. (D.) 

 similans, Lidg., on daphne; and P. (D.) zamiae, Luc, on Zamia 

 spiralis. 



Girault(A. A.). Descriptions of miscellaneous Chalcid-flies. — Insecutor 

 Inscitiae Menstruus, Washington, D.G., iv, no, 10-12, October- 

 December 1916, pp. 109-121. [Received 3rd February 1917.] 



The Chalcidoidea described include : — Tetrastichus malacosomae, 

 sp. n., from the eggs of Malacosoma americana and M. disstria in 

 California and from the eggs of M. fragilis in New Mexico ; Eurytoma 

 ctenodactylomyii, sp. n., and Neocatolaccus livii, sp. n., from the galls 

 of Ctenodactylomyia watsoni on Coccolobis uvifera (sea grape) ; 

 Coelopisthia rotundiventris, sp. n., from New Jersey, associated with 

 Plagiodera versicolora on willow; Elasmus mordax, sp. n., from 

 Phyllorycter {Lithocolletis) guttifinitella from the District of Columbia ; 

 E. aspidiscae, sp. n., reared from a cocoon of Coptodisca (Aspidisca) 

 splendoriferella on Crataegus from the District of Columbia ; and 

 Isodromus abnormicornis, sp. n., reared from leery a braziliensis in 

 Brazil. 



