503 



Mauritius appear only at a certain time of year and then are rapidly 

 destroyed by Syrphids, Braeonids, Coccinellids and fungi. In 

 Mauritius it has however had recourse to the sweet contents of the 

 vesicular hairs of Cordia interrupta, a plant introduced from British 

 Guiana about 15 years previously and now a troublesome weed in all 

 uncultivated fields. Though it would be premature to conclude that 

 lack of suitable food was chiefly responsible for the failure of attempts 

 to establish Tiphia parallela, yet it seems necessary to make a closer 

 study of food requirements when introducing insects from a long 

 distance. 



Bodkin (G.E.). Notes on the Coccidae of British Guiana.— Bull. 



Entom. Research, London, viii, no. 1, August 1917, pp. 103-109. 



This paper supplements an earlier one [see this Rcvieiv, Ser. A, ii, 

 pp. 416-417], and gives a list of 67 species with their host-plants. 

 Although the cost of the annual damage by scale-insects in tiritish 

 Guiana must be enormous, little is done by the smaller farmer to 

 control them, though spraying is carried out with beneficial results 

 on some of the large coconut estates. 



The following species of Coccinellidae, the most important 

 enemies of scale-insects in British Guiana, aie recorded : — Pentilia 

 insidiosa, Muls., predaceous only on Asterolecanium bambusae, Bdv.; 

 Hyperaspis f estiva, Muls., and H. ortliopustidaia, Muls., predaceous on 

 Pseudococcus saccliari, Ckll., on sugar-cane ; Brachyacantha decem- 

 punctafa, Melsh., an uncommon species predaceous on a species of 

 Pseudococcus; Neda dilychnis, Muls., Cryptogjiatha nodiceps, Mshl., 

 and Azya trinitatis, Mshl., predaceous on A. destructor, Sign., on 

 coconuts; A. pontbrianti, Muls., a common enemy of Saissetia liemi- 

 sphaerica, Targ. The Chryopsid, Chrysopa claveri, Navas, is 

 occasionally predaceous on Pseudococcus saccliari. 



The follo^^^ng Hymenopterous parasites have been bred from 

 Coccidae : — Arrhenophagus chionaspidis, Auriv., from Hemichionaspis 

 minor, Mask. ; Leptotnastix dactylopii, Howard, from P. citri, Risso ; 

 and Lecaniobius cockerelli. Ash., bred from Saissetia nigra, Nietn. 



Saissetia nigra., Nietn., S. oleae, Bern., S. hemisphaerica, Targ., and 

 Ceroplastes fioridensis, Comst., are also attacked by the Lepidopterous 

 larvae of Blastobasis lecanieUa, Busck, and the Pyralids, Vitula bodkini, 

 Dyar, and V. toboga, Dyar. 



Two species of entomogenous fungi, well known elsewhere in the AVest 

 Indies, are at times found attacking colonies of scale-insects, being 

 more effective in the more humid districts inland ; these are the red- 

 headed fungus, Sj^ihaerostilbe coccophila, principally attacking Chion- 

 aspis citri, ' and the shield-scale fungus, Cephalosporium lecanii, 

 attacking Saissetia nigra, S. oleae, S. hemisphaerica, Targ., Coccus 

 mangiferae, Green, C. hesperidum, L., and C. viridis. Green. 



The follo^^ang species of ants have been observed to be associated 

 with certain Coccidae, viz. : — Daceton armigerum, Latr., attending 

 P. citri, on cacao pods ; Cryptocerus atratus, L., attending P. citri. 

 Coccus hesperidum and Saissetia nigra ; C. minutus, ¥., attending 

 Pulvina.ria pyriform.is, Ckll, and C. hesperidum, L. ; Ectatoma tuber- 

 culatum, Oliv., attending Saissetia nigra, on Hibiscus; Teiramorium 



