536 



Reyne (A.). Verslag van den Entomoloog. [Entomologists' Report.] 

 — Verslag Dept. Landbouw in Suriname, 1918, Paramaribo, 1919, 

 p. 21. [Received 19th October 1920.] 



In the course of a study of the cacao thrips [Heliothrrps rubrocinctus] 

 only one natural enemy of any importance, a Chiysopid larva, has been 

 found in Surinam. Lasioderma occurred in stored coffee. A Penta- 

 tomid bug severely injured rice by sucking the young grain. 



Reyne (A.). Verslag van den Entomoloog. [Entomologist's Report.] 

 — Verslag Dept. Landbouw in Suriname, 1919, Paramaribo, 

 1920, pp. 20-24. [Received 19th October 1920.] 



The study of the cacao thrips [Heliothrips rt(brocinctus]\v^s continued. 

 Its natural enemies, larvae of Ckrysopa sp. and FrankUnothrips sp., 

 were noticed, but their numbers were too small to have any effect. 

 In one instance Xyleborus perforans, WoU., attacked old cacao plants, 

 though it is usually a secondary pest that occurs on cacao attacked 

 by canker. Caterpillars noticed on cacao in the preceding year have 

 been identified as Boccharis plenetinealis, Dyar, which rolls and binds 

 up the young leaves, Catephiodes zideana, Schaus, which eats holes 

 in the young leaves, and Zetesima theobromae, Busck, which binds 

 two old leaves together face to face before feeding. 



Coffee pests included Coptotennes marabitanos, Silv. (Joccus {Lecan- 

 ium) viridis occurred on Eugenia chrysopkylloides, a tree pecuhar to 

 Guiana, and on Phitirusa sp. If the latter is infested, any coffee bushes 

 among which it is planted are certain also to be attacked. 



The rice bug referred to in the previous report has been determined 

 as Mormidea sp. It did httle damage during 1919. A large quantity 

 of paddy swarmed with a moth, Sifotroga cerealella, which, however, 

 did no damage. 



Some coconut palms were severely attacked by caterpillars belonging 

 to the genus i^astnia, probably C. daedalus, and bananas were injured 

 by C. licus. 



The parasol a,nt, Atta sp., caused much annoyance to small cultivators, 

 and attempts to replace carbon bisulphide, which was unobtainable, 

 by other insecticides proved unsatisfactory against it. 



Reyne (A.). Eenlge Opmerkingen over de Bestrijding van Insekten, 

 sehadelijk voor Liberiakoflie. [Some Remarks on combating 

 Insects injurious to Liberian Coffee.] — Dept. Landbouw in Suri- 

 name, Paramaribo, Bull. 37, October 1919, 18 pp. [Received 

 19th October 1920.] 



Liberian coffee has not suffered much from insects in Surinam. The 

 green scale, Coccus (Lecanium) viridis, Green, has been disregarded 

 hitherto ; its excreta attract a small black ant, Cremastogaster sp., and 

 — on sandy soils — a red ant, Solenopsis saevissima, F. Smith, both of 

 which nest either in the ground or in the bushes. Especially during 

 the rainy season these tree-nests are full of scales. Dolichoderus 

 bidens, Latr. , interferes with the harvesting of the berries, but cannot 

 be said to be specially attracted by the scale. The latter also infests 

 Citrus and Artocarpus integrifolia. It may be held in check by natural 

 enemies in the Colony, but the apphcation of remedies is urged and 



