299 



The Cerambycids dealt with in this paper inchide Macrotoma editlis, 

 Karsch, found in all old plantations in San Thome ; Mallodon downesi, 

 Hope, which is rather less numerous and apparently only frequents 

 large trunks already infested by other insects ; Ancylonotits tribtdus, F., 

 evidently introduced from Africa, and occurring on almost all plantations 

 in the Island; and Sternotomis rnfozonatus, Fairm., common throughout 

 the Island. 



DE Seabra (A. F.) . Etudes sur les Maladies et les Parasites du Cacaoyer 

 et d'autres Plantes cultivees a S. Thome, xiii. Sur I'Existence 

 du Micyoccrotey))ics dolichogiuU/iiis, F. Silvestri, a S. Thome. — 

 Lisbon, Companhia Agricola Ultramarina, 1921, pp. 11-13, 

 1 plate, 6 figs. [Received 4th April 1922.1 

 A termite, distinct from Micyocerotermes tJieobyomac , has recently 



been observed in San Thome occurring in trees ; it is thought to be 



M. dolichognathus, which has not previously been recorded from the 



Island. 



DE Seabra (A. F.). Etudes sur les Maladies et les Parasites du Cacaoyer 



et d'autres Plantes cultivees a S. Thome, xiv. Le Toxopicya 



coffeae, Nietner, a S. Thome {Toxopteya coffeae thomcnsis, s. sp. n.). 



— Lisbon, Companhia Agricola Ultramarina, 1921, pp. 15-18, 



9 figs. [Received 4th April 1922.] 



On comparing Toxoptera coffeae, Nietn., described by Theobald 



from Africa [R.A.E., A, v, 456], with individuals taken in San Thome, 



certain dift'erences are observed that warrant the creation of a new 



subspecies, which is here described as T. coffeae tJwmensis. 



DE Seabra (A. F.). Etudes sur les Maladies et les Parasites du Cacaoyer 



et d'autres Plantes cultivees a S. Thome, xv. Les Termites des 



Plantations de Cacaoyers. Etude agricole. — Lisbon, Companhia 



Agricola Ultramarina, 1921, pp. 3-11, 7 plates, 11 figs. [Received 



4th April 1922.] 



The most important termite occurring in San Thome is A'eofermes 



gestroi, Silv., the only species that damages trees, killing the trunks 



and branches, which it enters by means of old wounds caused by 



Microceyotermes dolichognathus, Silv. Less important species commonly 



observed in the cacao plantations are Neotermes pallidicollis, Sjost., 



Schedoyhinoleymesputorius, Sjost., Teynies ostenians, Silv., Cephaloteymes 



rectangnlayis, Sjost., M. payvits theobyomae, Hav., and Miyoteymes 



amamlii[cf. R.A.E., A, viii, 492-3]. 



DE Seabra (A. F .) . Etudes sur les Maladies et les Parasites du Cacaoyer 

 et d'autres Plantes cultivees a S. Thome, xxi. Description d'un 

 Psyllidae Ravageur des Feuilles et des jeunes Fruits des Cacaoyers. 



— Lisbon, Companhia Agricola Ultramarina, 1920, pp. 3-6, 

 4 figs. [Received 4th April 1922.] 



Among the pests of cacao observed at San Thome is a Psyllid, 

 probably belonging to the genus Psylla, but which it has been impossible 

 to identify. Its principal characters are described. The form of injury 

 is very similar to that produced by Euphylhira olivina {Psylla oleae) 

 among olive trees in Europe, causing the death of the j^oung shoots, 

 leaves and newly formed fruits, and often preceding some serious 

 fungous disease. This pest may become as important as E. olivina is 

 in Europe if measures are not promptly taken against it. 



(6551) u 2 



