499 



noticed [R.A.E., A, iii, 730, 756 ; v, 502 ; vi, 141 ; vii, 4, 8 ; viii, 73, 

 etc.]. The history of the appearance of Phytalus smithi as a sugar-cane 

 pest in Mauritius is reviewed, and an account is given of its habits, 

 the damage done by it, and the remedial measures that have been 

 employed against it, inchiding the collection and destruction of the 

 beetles. The introduction and estabhshment of a Scohid parasite, 

 Tiphia parallela, from Barbados is described. 



The regulations under the Ordinance of 1911 regarding the notification 

 and treatment of areas infested with P. smithi are given, as well as 

 the proclamation of 1918 regarding the movement of infested earth 

 or cane-tops, the inspection of growing sugar-cane or other crops, and 

 the gro\^'ing of trap- crops. 



The cost of the campaign against P. smithi is worked out. It has 

 recently been decided that the entire cost of control of the pest should 

 be borne by the planters, and an export tax on sugar is suggested to 

 meet the cost of future campaigns. The measures taken and the 

 expenditure incurred are regarded as abundantly justifying the residts. 

 It is probable that if no remedial measures had been undertaken, 

 sugar-cane growing woukl have been rendered impracticable over 

 large areas. 



d'Emmerez de Charmoy (D. ). Notes on Insects accidentally introduced 

 into the Island of Mauritius. — Bull. Entom. Res., London, xi, 

 no. 2, September 1920, pp. 171-177. 



Mauritius is remarkable for the number of insect pests that have 

 been introduced into the Island, chiefly on exotic plants. The sugar- 

 cane industry was threatened with ruin owing to the introduction of 

 a borer, Proceras sacchariphaga, Boj., from Ceylon, and again was 

 largely damaged by the introduction of Pulvinoria gasteralpha, leery. 

 The cultivation of coft'ee and vaniUa has been in large part abandoned 

 owing to introduced pests and diseases. Legislation against these 

 indiscriminate importations began in 1882 ; more recent legislative 

 measures are briefly reviewed, and at the present time a regular and 

 efficient control is estabhshed over plant importations. The text of 

 the Ordinance of 1910, and the regulations made under it, are given as 

 an appendix to this paper. 



The introduction and history of the following pests in the Island are 

 discussed : — Phytalus smithi ; a Cecid' •myiicl fly that forms galls on 

 the leaves of mango trees ; Dacus d'emmerezi, which is a pest of marrows 

 and pumpkins ; the fowl flea. Echnidnophaga gallinacea ; the jigger, 

 Dermatophlus (Sarcopsylla) penetrans; a red ant, Solenopsis sp., 

 which is a household pest and attacks seeds and young seedHngs ; 

 the Coccids, Asterolccanium spectabile, Aspidiotus mauritianus, A. 

 destructor, Chionaspis simplex. Coccus (Lecanium) mangiferae, C. (L.) 

 hesperidum, and Pulvinaria antigoni ; a Phalangid, Gagrella fcae, 

 which is numerous in towns and forests and is sometimes so abundant 

 in houses as to constitute a domestic pest ; and a miUipede, Anoplo- 

 desmus saussurei. 



Williams (C. B.). A Pannier Hopper-Dozer. — Bull. Entom. Res., 

 London, xi, no. 2, September 1920, pp. 179-180, 1 plate, 1 fig. 



A hopper-dozer that has proved very satisfactory in the control 

 of the froghopper, Tomaspis saccharina, Dist., damaging sugar-cane 



(717) c2 



