216 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



Citrus Fruit Insects 



On the orange insects there need be no especial comment except in 

 the case of the white fly, Aleyrodes citri R. & H. This insect has 

 again gained a foothold in Plaquemines Parish, the principal orange- 

 growing section of the State, and this season has done considerable 

 damage. Efforts are being made to hold this insect in check by means 

 of the various fungus enemies which have given good results in 

 Florida, and with fair results. The white fly was formerly very 

 abundant in the orange groves of Plaquemines Parish, but was prac- 

 tically eradicated there by the destructive freeze of February, 1899, 

 which killed most of the orange trees in Louisiana and Florida. 



Insects Injurious to Pecans 



The walnut caterpillar, Datana integerrima G. & R., has done con- 

 siderable damage to pecan foliage, while the fall webworm, Hyphan- 

 tria cunea Dru., and the hickory twig-girdler, Oncideres cingulata 

 Say, have been about normally abundant. More than the usual num- 

 ber of complaints of attacks of the pecan huskworm, Enarmonia 

 prunivora Fitch, have been received. 



In December, 1908, Mr. T. C. Barber collected a number of newly 

 budded pecan branches (ring budded) which showed indications of 

 the attack of boring larvae. On investigation a number of Sesiid 

 larvae were found, in one case thirty being dug from a single limb. 

 They seemed to enter through the wound caused by the budding and 

 to work upwards from the bud. This caused a large swelling at the 

 point of injury, which was covered with the borings of the larvae. 

 Three infested limbs were placed in the insectary, and in March the 

 adults began to emerge, something like fifty specimens emerging from 

 these three small pieces of infested limbs between March 24 and April 

 28, 1909. Doctor Dyar kindly identified the moth as Sesia corusca 

 Hy Edw. 



The obscure scale, Chrysomphalus ohscurus Comst., has been found 

 abundant on pecan trees all over Louisiana. Cecidomyia caryw 

 0. S. is also abundant in all parts of the state, on wild pignut as 

 well as on cultivated pecan. 



We have on record one case of severe injury to a pecan tree at 

 Morgan City, La., by an ambrosia beetle, identified by Prof. F. H. 

 Chittenden, of the Bureau of Entomology, as Platypus compositus 

 Say. 



The two May beetles, LacJuiosterna prunina Lee, and L. fusca 

 Froh., which were very destructive locally in some sections in north- 



