12 



more numerous on acacia than on citrus trees and in some cases has 

 been a more important factor in the control of Icerya purchasi than has 

 Novius cardinalis. The adult fly and the early stages are described. 

 Oviposition is usually efiected on half-grown scales, and several eggs 

 may be deposited in the same host. The length of the egg-stage has 

 not been ascertained owing to the difficulty of getting the female to 

 oviposit in confinement, but it probably lasts four to five days. Two 

 hundred eggs may be laid by a single female. The young larva has 

 two long tails, which are sometimes twice the length of the body, and 

 swims about freely in the body cavity without inconveniencing the 

 host. The mature larva is pear-shaped and the tails are enormously 

 lengthened. In this stage it begins to destroy the tissues of the host, 

 which takes on the characteristic convex appearance of parasitised 

 individuals. The pupa is enclosed within the hardened contracted 

 larval skin which forms the puparium. In the cases observed several 

 days were required for the formation of the pupa. 



There are apparently five or six generations of this parasite during 

 the season, varying with the climatic conditions. 



Maskew (F.). Quarantine Division. Report for the month of August 

 1916. — Mthly. Bull. State Commiss. Hortic, Sacramento, Col., v, 

 no. 10, October 1916, pp. 391-392. 



The following insect pests were intercepted : — From Central America : 

 Lepidopterous larvae in chili peppers; Pseudococcus sp., Aspidiotus 

 cydoniae, Saissetia hemisphaerica, Aspidiotus cyanophylli and Chrysom- 

 phalus scutiformis on bananas. From Florida : Coccus {Lecanium) 

 mangiferae on mango. From Hawaii : Asterolecanium sp., Coccus sp., 

 and ChrysompJialus sp. on Hibiscus and oleander cuttings ; Diaspis 

 brmneliae and Pseudococcus bromeliae on pine-apples ; Hetnichionaspis 

 minor and ChrysompJialus aonidum on green coconuts ; weevils in 

 bean pods. From Japan : Aphis sp. on lotus plants ; larvae of a 

 borer in dry plant roots ; Calandra oryzae in rice flour ; mites in 

 bulbs. From New York : Aphis sp. on chrysanthemums ; Diaspis 

 boisduvali and Aspidiotus britannicus on orchids. From Philadelphia : 

 Aleurodes (Dialeurodes) citri, Aphis sp. and Pseudococcus sp. on 

 gardenias. From Tahiti : Lepidosaphes beckii on limes. From 

 Venezuela : Isosotna orchidearum on orchids. From Mexico : Chry- 

 somphalus aonidum and C. aurantii on coconuts ; unidentified Lepidop- 

 terous larvae and pupae on unknown fruit ; Phthorimaea operculellu 

 in potatoes ; Heliothis {Chloridea) obsoleta in maize. From New 

 Jersey : Diaspis boisduvali and Coccus hesperidum on orchids. From 

 Oregon : Chrysomphalus aurantii on a rubber tree. 



Davidson (W. M.). Economic Syrphidae in California. — Jl. Econ. 

 Entom., Concord, ix, no. 5, October 1916, pp. 454-457. 



The majority of Syrphids in California belong to the genus 

 Syrphus and prey almost exclusively on Aphids, though Baccha 

 lemur, 0. S., attacks mealy bugs (Pseudococcus) and Splmerophoria 

 sulphuripes, Thom., is predaceous on the bean thrips {Heliothrips 

 fasci<itus,'P erg.) in Southern Cahfornia. The injurious Aphids imported 

 from Europe — e.g., Aphis potni, De G., on apple, pear and loquat; 



