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quently found on Melaleuca leucadendron L. It is also found on necan, plum, ro- 
selle, sour son (which apoears to be a favorite host olant), and ylang-ylang., San 
Pedro de Montes de Oca, August 13 to September 8. M. mexicana is doing little if 
any damage to coffee;, it feeds uoon the leaves of malacca -neir -^i tho'ut dorttg much 
damage; also on ~ooro ( Srythrina ruhrinervia ) , which is used as -a shade for coffee 
and for living fence nosts; it "breeds on ylang-ylang. San Pedro de pontes' de Oca. 
Mo n ec-pho ra b i c i nc ta Say, a cerconid found on nara grass, is not very abun- 
dant and appears to do less damage at San Pedro de Montes de Oca than in the Cauca 
Valley of Colombia or in Camaguey, Cuba, where it is a nest of nrime importance. 
Saissetia hemi sphaerica Targ. is found on cosmos and Cyca s. revoluta ; it is 
especially harmful just now (September 8) on tender new growth of lemon, a serious 
pest on orange, appears to be the worst -nest on pitanga ( Eugenia uni flora ) . and is 
an important pest on Poncirus trifoliata and abiu ( Pout or ia caimitp Radlk. ), a 
valuable fruit; San Pedro de Montes de Oca. 
Saissetia oleae Bern. attacks cherimoya, San Pedro de Montes de Oca. It does 
but little damage to Mandarin orange, is not very -harm ful to orange, is harmful 
to Poncirus trifoliatus . and scarce on leaves of ylang-ylang. 
Pseudococcus citri Risso is not very important on grapefruit at San Pedro de 
Montes de. Oca, but is a serious nest on orange. 
At San Fedro de Montes de Oca, Al euro can thus wpglumi Ashby. is found on lemon; 
present on mango, but not important; a serious nest on orange. It is found on 
pitanga ( Eureni a uni flora ) but is not important. It is on lime in Tres Rios. 
Adults of the. citrus blackfly- gather in numbers on the tender new leaves of Ceiba 
' nehtandra to feed. It is nresent on coffee but not abundant at San Pedro.de Mon- 
tes de Oca and Paso Ancho do San Sebastian. The insect feeds on the leaves of Ma- 
lacca near (2, malaccensis ) without doing much damage, San Pedro de Montes de Oca. 
Adults are abundant on leaves of mulberry at ITaranja. It is a serious nest on 
orange. 
Selenasnidus articulata Morg. on orange from Liberia, Province, of Guanacaste. 
I have not seen this scale in the Meseta Central. (August 13 to September 8.) 
.. Lenidosa-phes beckii Newm. i3 found on lemon at San Pedro de Montes de Oca; 
it is a serious pest on orange. , . 
Leni do sashes gloveri Pack, is a serious pest on orange at San- Pedro de 7'ontes 
de Oca.' ■ • ■ , • 
Aulacasnis nentr-ziona Targ. is always bad on mulberry (M. rubra ) , also harm- 
ful on Hibiscus mutabilis L. and peach. This insect is serious on an Excelsior 
plum tree in San Pedro de Montes de Oca, October 8. 
Ischnasni s long i rostris Sign, causes yellowing and death of vines on isolated 
plants of Asparagus snren,-:eri at Paso Ancho de San Sebastian and San Jose, Oct. 8. 
A homopterous insect, Aethalion quadra turn Fowl. , is sometimes found in colo- 
nies on the branches and twigs of avocado. The females deposit a mass of eggs 
over which they remain until hatched. 'Then the colonies are large they cause de- 
