714 



numbers of Xijlofnipcs gideon, L., were also collected and were stated 

 by the coolies to have all been caught on the leaves. Larvae of 

 Brachartona catoxantha were only found here and there. 



The Pyralid, Metis sohlaptes rufovenalis, was found in great numbers 

 on the same plantation, which is in another district from that in 

 which the author first met with it. In a Hevea plantation, Pulvinaria 

 {Lecanium) psidii was found ; this is an addition to the list of the 

 pests of Hevea in Java. 



Cornwall (J. W.). Lepisma sacchirina (?); its Life-History and 

 Anatomy and its Gregarine Parasites. — Ind. JI. Med. Research, 

 Calcutta, iii, no. 1, July 1915, pp. 116-131, 5 plates. 



Lepisma saccharina (silver fish) in the Madras Presidency seems to 

 thrive better in the hills than in the plains. Its ravages amongst 

 unprotected books, papers, etc., are sufficient to make measures of 

 extermination advisable. The female deposits from 6 to 10 eggs at a 

 time in sheltered crevices. Hatching takes place in 45 to 60 days at 

 65°-68° F. The young insect resembles the adult in its main 

 characteristics. "Maturity is reached about 2 years after hatching. 

 Feeding takes place at night. The mean duration of life without food 

 was 88 days in insects kept under observation. A mixed diet, containing 

 proteid as well as carbohydrate, is necessary to maintain full vigour, 

 though how proteid is obtained in the usual surroundings is not 

 obvious. The adults do not tolerate an increase in temperature, if the 

 air is dry. They are killed by the vapours of camphor, naphthaline, 

 etc., in a confined space ; also by crushed eucalyptus leaves, oil gas 

 and tobacco smoke. Paper impregnated with mercuric chloride is 

 poisonous to them ; white arsenic kills very slowly, wdiile red phos- 

 phorus has no effect. A monthly cleansing of books and papers 

 should be sufficient to keep them from doing damage. 



Two distinct species of Gregarines are parasitic in the gut of Lepisma, 

 occurring either attached to the mucous membrane of the anterior 

 part of the mid -gut, or else free in the gut cavity. When collections 

 of the old excreta of Lepisma were made from undisturbed places, a 

 number of Psocidae were swept up as well, but no connection between 

 the two insects was apparent. The Psocidae were preyed on by small 

 Arachnids, which may also prey on young Lepisma, but were not 

 observed to do so. 



An account of the anatomy of L. saccharina and its parasites is given.. 



De Stefa2vi (T.). Due parassiti su piante della grande coltura siciliana, 

 [Two pests of plants largely growTi in Sicily.] — U AgricoUore Agri- 

 gentino, Girgenii, vii, no. 1, April 1915, pp. 61-65, 1 fig. [Received 

 27th September 1915.] 



A list of plants injured by Tylenchus devastator is given. The second 

 pest, a Cynipid, Aulax lini, sp. n., causes considerable injury to the 

 stems of flax, on which it produces a gall about the size of a small 

 pea. 



