104 G. E. BODKIN. 



a few species, either dried or microscopical preparations, and in many cases both, 

 are preserved in this laboratory. 



For the sake of convenience the classification adhered to throughout the paper 

 is that adopted by Mrs. Fernald in her well-known catalogue. 



In British Guiana, as elsewhere, scale-insects are among the worst insect enemies 

 with which agriculturists have to deal. The cost of their annual depredations must 

 be enormous, yet little is done by the smaller farmer in the way of controlling them. 

 Systematic spraying is carried out on some of the large coconut estates with beneficial 

 results. 



The Coccinellidae are among the most important enemies of scale-insects in 

 this country and the following species have been observed and identified. 



Pentilia insidiosa, Muls. Observed to be predaceous only on Asterolecanium 

 bambusae, Bdv. It is a common species where this Coccid occurs ; few bamboos 

 are free from them. 



Hyperaspis festiva, Muls. Predaceous on Pseudococcus sacchari, Ckll. Occurs 

 commonly, being found beneath the leaf-sheaths of sugar-cane with the scale. 



Hyperaspis orthopustulata, Muls. Another common enemy of P. sacchari, Ckll. 



Brachyacantha 10-punctata, Melsh. Predaceous on a species of Pseudoccus. An 

 uncommon species. 



Neda dilychnis, Muls. Predaceous on Aspidiotus destructor, Sign. An uncommon 

 species, but found in this one instance occurring in large numbers on a heavily infested 

 coconut palm. 



Cryptognatha nodiceps, Mshl. A common species preying on A. destructor, Sign. 



Azya trinitatis, Mshl. Another common enemy of A. destructor, Sign. 



Azya pontbrianti, Muls. Frequently occurs as an enemy of Saissetia hemi- 

 sphaerica, Targ. 



The Chrysopid, Chrysopa claveri, Navas, is occasionally found as a predaceous 

 enemy of the sugar-cane mealy bug (Pseudococcus sacchari, Ckll.). 



The following Hymenopterous parasites have been bred from Coccidae at various 

 times. Considerable difficulty has been experienced in obtaining identifications. A 

 large number of species still await determination. 



Arrhenophagus chionaspidis, Auriv., bred from Hemichionaspis minor, Mask. 



Leptomastix dactylopii, Howard, bred from Pseudococcus citri, Risso. 



Lecaniobius cockerelli, Ashm., bred from Saissetia nigra, Nietn. 



Three species of coccophagous Lepidopterous larvae occasionally occur, namely 

 Blastobasis lecaniella, Busck (Blastobasidae), Vitula bodkini, Dyar (Pyralidae) and 

 Vitula toboga, Dyar (Pyralidae). These three species attack indiscriminately the 

 following Coccids : Saissetia nigra, Nietn., Saissetia oleae, Bern., Saissetia hemi- 

 sphaerica, Targ., and Ceroplastes floridensis, Comstock. 



Two species of entomogenous fungi are at times found attacking colonies of scale- 

 insects. Both species are well known elsewhere in the West Indies. They are the 

 red-headed fungus (Sphaerostilbe coccophila, Tul.) and the shield-scale fuugus 

 (Cephalosporium lecanii). The red-headed fungus principally attacks Chionaspis 

 citri, Comstock ; while the shield-scale fungus attacks such Coccids as Saissetia 



