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DIPTERA 
Argyrophyl ax albincisa Wied. adults were numerous on "banana leaves at 
Guayama on~December 24, 1933. (Det. J. M. Aldrich.) (A. S. M.) 
Adults of Lixophaga diatraeae Tns. were numerous on "banana leaves at 
Guayama on December 24, 1933. (Det. J. M. A.) (A. S. M.) 
Many Agrom yza caerulea Malloch adults were reared from flower heads of 
margarita at Guayama on December 25, 1933. (Det. J. M. A.) (A, S. M.) 
Psychodid adult, larvae, and pupae ( Psycho da alb i punct ata Will.) were 
reared from a dead cockroach which was lying in a wet position at Mayaguez 
on October 13, 1933. (Det. Alan Stone.) (A. G. H.) 
ORTHOPTERA 
Nymphs of Ellipes rainuta Scudd. were common on leaves of cucumbers at 
Caguas on November 17, 1933. (Det. A. N. Caudell.) (C. G. A.) 
i 
INSECT CONDITIONS IN COSTA RICA OCTOBER 1 - December 31, 1933 
C. H. Ballou, San Jose, Costa Rica. 
(Unless otherwise indicated, observations were made at San Pedro de Montes de Oca.) 
COCCIBAE 
Aulacaspis pentag ona Targ. was very abundant and severely damaging peach 
during the time here covered, and observed damaging Diosoyros virginiana and 
Hibiscus mutabilis . This scale was observed on peach at Gaudalupe, at San 
Ysidro de Coronado, and at Paso Ancho de Sebastian in late November and early 
December. 
Pseudococcus citri Risso was noted as damaging mandarin and orange during 
the time here covered and during December was observed in injurious numbers on 
coffee. 
Saissetia hemisphaerica Targ. was noted in damaging numbers on Diospyros 
kaki the last of October. The scale was being attended by Solenopsis geminata 
Eab. 
Chrysomphalus dictyospermi Morg. was noted in damaging numbers on rose 
at Chapui on October 8. The scale was very abundant on and injurious to 
orange the middle of December. 
APHIIDAE 
Toxopt era a urant iae Boyer damaged orange during the entire period. 
Apni s spiraecola Patch was appearing in injurious, numbers on orange the 
last of December. All stages were present. 
Aphis pomi DeG. was noted as injurious to quince on November 28, 1933. 
