396 



Lintn., and it was discovered that above 76° F. and below 91° F. is 

 the most favourable temperature for the reproduction of this fly. 

 Infestation may take place at 60°-65° F., but at this temperature the 

 increase of the insect is slow. 



CocKERELL (T. D. A.). A ncw Monophlebine Coccid from Borneo. — 



Jl. Econ. Entom. Concord, N.H., xii, no. 3, June 1919, p. 272. 



Llaveia haematoptera, sp. n., from Borneo is described and compared 

 with L. raddoni, Westw., and L. sanguinea, Ckll. 



CocKERELL (T. D. A.). The San Jos§ Scale in the Argentine Republic. 

 — Jl. Econ. Entom., Concord, N.H., xii, no. 3, June 1919, p. 272. 



Attention is drawn to the fact that the San Jose Scale, Aspidiotus 

 pemiciosus, has now been recorded for the first time from Argentina. 



Felt (E. P.). Army Worm [HeliopMla unipuncta, Haw.). — Jl. Econ. 

 Entom., Concord, N.H., xii, no. 3, June 1919, p. 272. 



The army worm, Cirphis (Heliophila) unipuncta,, is reported for the 

 first time from New York State, where it is infesting maize in large 

 numbers. The appearance of this moth so far north leads to the 

 behef that it can withstand cold more successfully than has previously 

 been supposed [see this Review, Ser. A, iii, p. 683]. 



Felt (E. P.). Anihrenus verhasci, Linn., a Seventeen-Year Breeding 

 Record. — Jl. Econ. Entom., Concord, N.H., xii, no. 3, June 1919, 

 p. 273. 



In ears of maize infested with Anthremis verhasci.^ L., that were 

 placed in tightly closed jars in April 1902, this beetle has apparently 

 been breeding without interruption for 17 years. 



Paillot (A.). Contribution a I'Etude des Parasites microbiens des 

 Insectes. Etude de Bacillus hoplosternus (Paillot). — Ann. Inst. 

 Pasteur, Paris, xxxiii, no. 6, June 1919, pp. 403-419, 8 figs. 



Experiments made to test the pathogenic action of Bacillus hoplo- 

 sternus upon various injects are described. The larvae of Porthetria 

 (Lymantria) dispar show a decided imnumity, and the mechanism of 

 this immunity is discussed at length. In the case of Nygmia phaeorrhoea 

 {Euproctis chrysorrhoea) the larvae are very susceptible, and died 

 within 24 hours when inoculated. Larvae of Vanessa urticae and of 

 Arctia (Chelonia) caja are equally susceptible, being killed in 20 to 24 

 hours from the first passage of the bacillus. At the moment of 

 death, the blood is relatively poor in microbes, and it would seem, 

 therefore, that the bacillus is chiefly pathogenic owing to a toxin that 

 it secretes. After the death of the insect, it continues to multiply 

 in the blood. The larvae of Malacosoma neustria perish in 15 to 18 

 hours after inoculation. 



