227 



VAN ZwALuwENBURG (R. H.)- Report of the Entomologist.— i?qj?. 

 Porto Rico Agnc. Expt. Sta.191'), Washington, D.C., 23 November 

 1916, pp. 42-45. [Received 30th March 1917.] 



The principal sugar-cane pests were white grubs [Lachiosterna] and 

 the moth borer [Diatraea]. The pests of coffee included the coffee 

 weevil {Lachnopus sp.), the leaf-miner [Leucoptera coffceUa] and 

 Mijnnelachista ambigua ramuhrum. Experiments were made with 

 native trees in the hopes of finding one on which this ant could not 

 form colonies of scale-insects, but no suitable one was fomid. 



Among garden insects, the changa {Soapier isciis didactylus), the flea 

 beetle {Systena basalis) on beans, beets and okra, and a weevil {Bar is 

 torquatuii) on egg-plant, were very troublesome. The adults of this^ 

 last are very common on Solanum torvum, but the young stages have 

 only been found on egg-plant. A lace-wing {Corgthaica monacha) 

 is also very common on egg-plant. A 1 : 10 kerosene emulsion spray 

 will act as an effective control of this insect. 



Furniture and wood- work in houses were attacked by two species 

 of termites, Eutermcs morio and Leucofermes sp. The former may be 

 cheaply and effectively controlled by placnig liberal quantities of any 

 powdered arsenical poison in the runways and nests. London purple 

 gives quicker results than Paris green, probably owing to the finer 

 division of the particles. The other species is most effectively con- 

 trolled by fumigation with hydrocyanic acid. 



Young coconut trees are often killed as the result of damage done by 

 the adult rhinoceros beetle {Sfrategus quadrijovealus). The larvae of 

 this beetle only feed in dead wood, so that if care is taken to have no 

 logs lying about, no breeding places will be left in the vicinity and 

 the chances of attack by the adults will be lessened. The larval 

 period is a long one, probably requiring over a year for completion. 

 Some growers make piles of decaying logs and cover them loosely 

 with earth ; these are inspected about once in six months, and all 

 larvae found in them destroyed. 



Yomig mahogany trees are often attacked by the Bostrychid, 

 Apate francisca. The yoimg stages are only found in dead trees, but 

 the adult often so weakens the tree that it is easily broken in a heavy 

 wind. The adults may be killed by running a stiff wire into the 

 burrows. This beetle also attacks coffee, citrus and pigeon-peas. 



Miscellaneous insects included a Lepidopterous larva attacking 

 ornamental palms and a Noctuid (probably Eriopus floridensis) on 

 ornamental ferns. Aspidiotus destructor often seriously injures coco- 

 nuts, especially in the dry parts of the island. The best method of 

 control on yoimg trees is an oil spray. On large trees the removal 

 and destruction of the leaves most heavily infested is advised. Sipha 

 jlava, the yellow Aphid of sugar-cane, was very numerous in small 

 areas, but is for the most part effectively controlled by predaceous 

 enemies. Oleanders are often attacked by the larvae of Em.pgreuma 

 Jichas. Hand-picking the larvae is the best means of control. 



Gillette (C. P.). Habits of Some Common Plant Lice. — Mtldy. Bull. 



Cal. State Commiss. Hortic, Sacramento, \i, no. 2, February 1917, 



pp. 59-63, 2 figs. 

 This paper gives a popular accomit of the habits of some of the 

 commoner Aphids. They are preyed upon by Coccinellids, in both 



