NOTES ON THE COCCIDAE OF BRITISH GUIANA. 107 



Lepidosaphes pinnaeformis, Bouche. Recorded from British Guiana in 1892 by 

 Maskell. It has not been taken here since. 



Ischnaspis longirostris, Sign. Commonly occurs on mango (Mangifera indica), 

 Liberian coffee, and many species of ornamental palms. 



Parlatoria ziziphus, Lucas. To be found at times on citrus plants, though it is 

 not a common species. 



Subfamily Ortheziinae. 



Orthezia insignis, Douglas. An exceedingly injurious and common species. 

 Found on a large variety of plants, chiefly belonging to the order Compositae. This 

 and the following species are well-known garden pests, especially in Georgetown. 



Orthezia praelonga, Douglas. Commonly infests a number of plants such as crotons, 

 mangoes, Barbados cherry, etc. ; it has also been known to attack sugar-cane and 

 a species of rubber tree (Sapium jenmani). 



Subfamily Dactylopiinae. 



Asterolecanium bambusae, Bdv. The ordinary species of bamboo are seldom 

 without this Coccid. It is widely distributed over the Colony. 



Asterolecanium jimbriatum, Fonsc. Recorded from British Guiana in 1889 by 

 Morgan on leaves of Cupania sapida. I have been quite unable to find this species 

 despite a vigorous search. 



Asterolecanium pustulans, Ckll. A not uncommon Coccid on the leaves of some 

 orchids and the akee (Blighia sapida). On several occasions I have observed it on 

 the twigs of Hevea brasiliensis, where it was causing considerable damage. 



Lecaniodiaspis dendrobii, Douglas. Recorded from British Guiana by Douglas 

 in 1892. I have not been able to find this species on the host-plant mentioned by 

 Douglas. 



Pseudococcus citri, Risso. Of frequent occurence on citrus plants, cacao, ferns, 

 crotons, occasionally on rice plants and several species of grasses, rarely on sugar- 

 cane. 



Pseudococcus nipae, Mask. Recorded from British Guiana in 1893 by R. Newstead 

 on coconut palms. Not a common species. 



Pseudococcus virgatus, Ckll. On one occasion collected from the leaves of Boulanger 

 or egg-plant. It occurs also on some garden plants, such as violets. 



Pseudococcus sacchari, Ckll. The common sugar-cane mealy bug of British 

 Guiana. Found wherever sugar-cane is grown. It is much more prevalent in dry 

 weather, when it flourishes ; wet weather causes it to be attacked by a green parasitic 

 fungus which causes great mortality. 



Subfamily Tachardiinae. 



Tachardia lacca, Kerr. Collected here in 1890 by Robert Ward in the Botanic 

 Gardens. I have not observed the species personally. 



Tachardia bodkini, Newst. Collected on the twigs of a native rubber-producing 

 tree, Sapium jenmani. A rare species. 



