NOTES ON THE COCCIDAE OF BRITISH GUIANA. 105 



nigra, Nietn., Saissetia oleae, Bern., Saissetia hemisphaerica,T 'arg., Coccus mangiferae, 

 Green, Coccus hesperidum, Linn., and Coccus viridis, Green. 



Both of these fungi are more effective in the interior districts, where a more humid 

 climate prevails. On the coast lands they are only operative during the rainy season. 

 The following species of ants have been observed to attend certain species of 

 Coccidae. 



Daceton armigerum, Latr. P. citri, Risso, on cacao pods. 



Cryptocerus atratus, L. P. citri, Risso, Coccus hesperidum, Linn., 



Saissetia nigra, Nietn. 

 Cryptocerus minutus, F. Pulvinaria piriformis, Ckll., Coccus hesperidum, 



Linn. 

 Ectatoma tuberculatum, Oliv. Saissetia nigra, Nietn., on Hibiscus. 



Tetramorium guineense, F. Pseudococcus sacchari, Newst. , on sugar-cane ; 



P. citri, Risso, on cacao pods. 

 Azteca schimperi, Em. Lecanium aequale, Newst., on Courida ; Cero- 



plastes avicenniae, Newst., on Courida. 

 Dolichoderus (Hypoclinea) Pseudococcus citri, Risso, on cacao pods. 



bidens, L. 

 Solenopsis pylades, Forel. Pseudococcus sacchari, Newst. 



A species of Cremastogaster fosters AJcermes quinquepori, Newst. 



Family COCCIDAE. 

 Subfamily Monophlebinae. 



Llaveia abrahami, Newst. A rare species. First observed by Mr. A. A. Abraham 

 at the Government Experimental Station, Issororo, N.W.D. It was only found 

 in this- instance in an indentation of the bark of the native rubber tree, Sapium 

 jenmani. 



Subfamily Diaspinae. 



Chionaspis citri, Comstock. A very common species ; to be found on the bark 

 of most species of citrus trees and also on the castor oil plant. 



Howardia biclavis, Comst. Fairly common on the branches of jasmin (Jasminum 

 sp.). 



Howardia biclavis detecta, Mask. A very uncommon form. Only once collected 

 on the branches and twigs of the native rubber tree, Sapium jenmani. 



Diaspis boisduvali, Signoret. Occasionally found on the stem of plantains. 

 Common on the leaves of some orchids, especially the Cattleyas. 



Diaspis echinocacti opuntiae, Ckll. Recorded in 1893 from British Guiana by 

 T. D. A. Cockerell and in 1889 by Newstead. I have personally never collected 

 this species in the Colony. 



Aulacaspis rosae, Bouche. Very common on the leaves of mango trees ; also 

 found on cinnamon (Laurus cinnamonum). The males are always more conspicuous. 



Hemichionaspis minor, Mask. Fairly common on cultivated cotton and also on a 

 species of wild ipecacuanha. 



