-98- 
INSECT CONDITIONS III COSTA RICA. 
C. H. Ballou 
San Jose, Costa Bica 
(Unless otherwise indicated, observations were made at 
San Pedro de Montes de Oca) 
COCCI DAE 
Aleurocanthus woglurai Ashby was present on sweet orange during March. 
During January, February, and March Aulacaspis pentagona Targ. was abundant 
and injurious on Diospyros virginiana L. and peach. 
In March Cerp-plastes f loridensis Comst. was attacking croton and sweet 
orange at San Pedro de Montes de Oca and Lourdes. 
Chrysomphalus dictyospermi Morg. was very harmful on mango and sour orange 
during March. 
Ischnaspis longirostris Sign, was -found on mango March 7. 
Pseudococcus citri Risso was present on sweet orange March 17. 
Pseudococcus virgatus Ckll. was harmful to croton during March. 
Pulvinaria psidii Mask, was found on Diospyros kaki March 7, on D. 
virginiana March 13, and during the month on ylang-ylang. 
Saissetia hemisphaerica Targ. was taken on toronjo ( Citrus sp.) March 10, 
and on coffee March 22. 
Trionymus sacchari Ckll. was reported on sugarcane March 10. 
Lepidosaphcs beckii Newm. was very harmful to sweet orange during March. 
APHIIDAE 
Aphis illinoisensis Shim, was harmful to muscadine grapes during '.'. 
Aphi s pomi DeG. was taken on apple March 6. 
Toxoptera aurantii Boyer was doing serious damage on March 31 on tender 
leaves of coffee plants that had been defoliated by Cercospora coffeicola E. & C. 
March 6, at Lourdes, and March 14 a t San Pedro de Montes de Oca it was. observed 
as very harmful on sweet orange. 
Anoecia sp.,a root aphid, (close to A. querci Fitch), was busily at work, 
with other insects, on rice and the rice suffered heavily, November 12 to 
December 18, 1932. (Det. P. W. Mason.) 
MI SC3LLANE0US HOMOPTEEA 
Cicadella sexlineata Sign, was reported on geranium ( Pelargonium gp.) 
March 12. 
