99 



the Aphids of Florida, some 30 species are enumerated, while many 

 collected could not be determined owing to the lack of mature or 

 winged forms. At least two hitherto undescribed species were found, 

 and there are undoubtedly many more. 



Chaffin (J.). Mealyhngs.—Floyida Ent., Gainesville, v, no. 2, October 

 1921, pp. 31-33. 



The most injurious mealybug in Florida at the present time is 

 Pseudococc'us citri (common citrus mealybug), found in nurseries and 

 greenhouses and sometimes in citrus groves. The dry summer of 

 1921 was favourable to it, and the damage done was above the 

 normal. P. nipae (coconut mealybug) is always present in the southern 

 part of the State ; in 1921, avocados, mangos, sapodillas, palms and 

 other ornamental plants were covered with the insects. This species 

 has fewer natural enemies than P. citri. P. hromeliae (pineapple 

 mealybug) is becoming quite an important pest. 



Owing to the large number of food-plants, rotation of crops is of very 

 little use in control ; natural enemies are Hymenopterous parasites, 

 Coccinellids and the larvae of Syrphid and lacewing flies. x\ fungus 

 was observed attacking the mealybugs, and during the rainy weather 

 destroyed them in several groves ; if this fungus can be induced to 

 thrive in dry weather, or some parasite be found to operate until the 

 rainy season begins, control of these pests would be assured. 



Grossexbacher (J. G.). It pays to control Rust mH^.— Florida Ent., 

 Gainesville, v, no. 2, October 1921, pp. 33-35. 

 The rust mite [Eriophyes oleivorus] feeds on the new, green growth 

 of citrus trees, including leaves, fruit and twigs, and lives on the 

 juices extracted, particularly the oil. The rusty appearance is due 

 to oil oozing from glands that have been punctured by the mites. 

 The effects of infestation on fruit are considerable and various, depend- 

 ing upon the relative earliness and intensity of the infestation and 

 on weather conditions during the period of greatest activity. The 

 loss caused to growers is of two kinds, the discoloration of the rmd 

 and stunting of the fruit, and the devitalising effects on the trees, 

 which reduces the fruit crop of the following season. 



Beeson (C. F. C). Bark-beetles of the Genus SpJmerotrypes.^Ind. 

 Forester, Allahabad, xlvii, no. 12, December 1921, pp. 514-518. 

 During recent investigations on borers of sal and other trees in 

 natural Indian forests, it has become apparent that considerable 

 confusion exists as to the identity of the insects concerned, and that 

 some of the species dealt with in Stebbing's " Indian Forest Insects 

 [R. A.E., A, iii, 154] have been wrongly named. The genus Sphaero- 

 trypes has in particular been under observation, and the life-histories 

 of these bark-beetles studied. The author has previously pointed out 

 that 5. assamensis, Steb., should be treated as a synonym of 5. siwali- 

 kensis, Steb. [R.A.E., A, iii, 706], and also that S. coimhatorensis, 

 Steb., is a synonym of 5. globulus, Blandf. Chramesus globidus, Steb., 

 should be transferred to the genus Sphaerotrypes, and S. tedus, Winn- 

 Samps. iin litt.) n. n., is proposed for it. A revision of this genus 

 is now being made ; meantime a summary of the principal conclusions 

 is published, with a corrected synonymy and distribution of the genus 

 as occurring in India. 



