501 



S. Nigeria, on pigeon-pea ; Icerya nigroareolata, sp. n., from Uganda, 

 on coffee and croton ; 7. suJfurea var. 2^(fiie>'soni, n., from the Gold 

 Coast, on Tectona sp. ; Margarodes buxtoni, sp. n., from Algeria ; 

 Slidococcns intermedins, sp. n., from the Gold Coast, on cacao ; 

 Asfewlecanimn spectabik, sp. n., from Mauritius, on palm trees ; 

 Lecaniodiaspis tarsaUs, sp. n., from S. Africa ; Phenacoccus ballardi, 

 sp. n., from S. India, on mango ; Tackardia bodkini, sp. n., from 

 British Guiana, on Sajnum jenmani ; Pidvinaria aristolochiae, sp. n., 

 from the Gold Coast, on Arislolochia sp. ; P. elongata, sp. n., from 

 British Guiana, on sugar-cane ; P. subterranea, sp. n., from Uganda, 

 on roots of Chryscmthemum ; P. africana, sp. n., from the Gold Coast, 

 on guava, many of the examples being attacked by a parasitic fungus 

 and preyed upon by a Lepidopterous larva ; Ceroplastes avicenniae, 

 sp. n., from British Guiana, on AvicenniO' nitida ; C. bipartitus, sp. n., 

 from S. Africa ; C. destructor, sp. n., from Uganda ; C. lamborni, sp. n., 

 from Southern Nigeria, on cacao ; C. subdenudatus, sp. n., from 

 Uganda, on Acacia ; C. zonatus, sp. n., from S. Africa ; Inglisia 

 theobromae, sp. n., from Uganda, on cacao pods and flowers. 



Descriptions are also given of Monophlebus ? kirfus. Brain, from 

 Nyasaland ; Stictococciis gowdegi, Newst., from Southern Nigeria, on 

 young shoots of cacao, invariably protected by the ant Oecophylla ; 

 S. multispinosus, Newst., from S. Nigeria, on pigeon-pea, and from 

 Uganda, on Markhamia ji^atycalyx ; Pidvinaria ? JIavicans, Mask., 

 from British Guiana, on " blood-wood " plant ; Ceroplastes egbaruni, 

 Ckll., from the Gold Coast, on Pithecolobium saman; and C. vuilleti, 

 March., from S. Nigeria, abundant on pigeon-peas. 



Waterstox (J.). A New Species of Paraphelinus, Perk., from British 

 Guiana, with a Discussion of tlie Genus and the Allied Aphelinus, 

 Da,lm.~-Bull. Entom. Research, London, viii, no. 1, August 1917, 

 pp. 43-58. 



The genus Paraquhelinns is of economic importance o^^ang to the 

 fact that its members destroy the eggs of Xiphidinm and Tomaspis, 

 while most Aphelininae attack Aphids, Coccids and Aleurodids. 



P. xiphidii, Perkins, efficiently controls the grasshopper, Xiphidium 

 varipenne, Swez., the eggs of which it attacks after they have been 

 laid in clusters beneath the leaf-sheath of the sugar-cane. Its hfe-cvcle 

 varies from 20-31 days, that of the host being three months, which 

 places the parasite at a distinct advantage. This parasite was first 

 observed in 19«'!5, in the grounds of the Hawaiian Sugar Planters 

 Association's Experiment Station, Honolulu, where it had almost 

 certainly been introduced. Examples of this Chalcid have been found 

 both in Trinidad and British Guiana, during investigations on the 

 natural enemies of Tomaspis in order to find an effective control of 

 the froghopper, T. saccharina, Dist. Experiments have shovm that 

 P. xijyhidii bred as a hyper-parasite from cocoons of a Dryinid, 

 Haplogonatopus, Perk., readily attack the eggs of Xiphidium, but the 

 resulting imagines quite as freely reverted to Haplogonatopus ; this 

 is unfortunate, since it is desirable to protect this Dryinid enemy of 

 leaf-ho]Dpers. Xiphidium varipenne itself, though a noxious insect in 

 its destruction of young shoots, stamens, etc., is also useful as it 

 devours Aphids. 



