D ecember, '14] RUST: NOTES ON COCCIDyE FOUND IN PERU 471 



cannot be doubted after a glance at the following list of host plants, 

 all but two of which are in addition to those recorded in Mrs. Fernald's 

 "Coccidse of the World. " All localities mentioned are in the Depart- 

 ment of Piura, Peru. 



Collected quite generally on cotton; Phaseolus sp., Ricimis communis, Salix hinn- 

 holdtiana, watermelon, Coscomba; Capsicum sp., Sol Sol; Ricinus communis, 

 Catacaos, and Macacard; Prosopis juliflora, Coscomba; Asparagus officinalis, Piura; 

 Sesbania sp. Coscomba; Yucca gloriosa, Samdn; Coscomba; Piura, "cereza," Cos- 

 comba; watermelon, Catacaos; Malvasirum sp., Hacienda San Jacinto. 



Lepidosaphes heckii Newm. 



Many j^ears ago good oranges were grown in the vicinity of Lima 

 but at present even a citrus tree is a rarity and all the citrus fruit is 

 brought either from Ecuador, or small, well isolated valleys in different 

 parts of the Peruvian Republic. This situation is caused by the 

 ravages of various insect pests, among the most formidable of which is 

 L. becJcii, but today the scale is rarely encountered for the simple 

 reason that its food plants have nearly all been destroyed wherever 

 the scale has gained a foothold. Although many parasites are present 

 they do not dominate their hosts to such an extent as to make the 

 raising of citrus fruit, on a commercial scale, an attractive proposition 

 in this section. 



Lepidosaphes heckii has been collected by this office as follows: on orange trees, 

 Lima, and at Hacienda Nana (between Lima and Chosica). 



Two other species of Lepidosaphes have been collected in this Repub- 

 lic but as 3^et neither of them has been classified. The writer has 

 repeatedly taken a small, light-colored species from citrus trees in the 

 Department of Piura where it is a great hindrance to the growth of all 

 species of Citrus, being especially common on the orange. It is also 

 common on a plant which is parasitic on Prosopis jidiflora. 



The other species is very like L. heckii, but a close examination dis- 

 closes differences, the best marked of which is its larger size and slightly 

 different color. Taken by Professor Townsend on oranges from 

 Pacasmayo. 



Orthezia insignis Dougl. 



Collected as follows: on Juslicia sp., Lima; on Ligustrum japonicum, Lima; on 

 Duranta plumieri, Lima; on Jacaranda punctata, Lima; on Bignonia slans, Lima. 



Pseudaonidia articulatus Morg. 

 This coccid is the commonest, and most widely distributed of all 

 those found in this country and is also the most omnivorous feeder, 

 attacking as it does a very wide range of food plants. The hosts most 

 generally infested are the different species of Ficus and Citrus trees, the 

 latter being infested, almost without exception, throughout the Repub- 



