266 



State officials to prevent its establishment in California. The chief 

 source of danger is the traveller who may have a few infested exotic 

 fruits in his baggage or pockets. 



Smith (H. S.). Insect Parasites and Predators as Adjuncts in the 

 Control of Mealy Bugs. — Mtlily. Bull. Cat. State Commiss. Hortic, 

 Sacramento, vi, no. 3 & 4, April 1917, pp. 108-114, 9 figs. 



About twenty different species of mealy bugs are to be found in 

 California, but only three are usually found on citrus trees, viz. : — 

 Pseudococciis citri (citrus mealy bug), P. bakeri (Baker's mealy bug) 

 and P. citroph Has (citrophilus mealy bug). These are entirely resistant 

 to fumigation as ordinarily carried out. If strong enough to kill the 

 scales, serious injury to the trees results. The most satisfactory' 

 method of controlling these pests has been found to be the introduction 

 of parasitic and predaceous enemies, and in order to get the greatest 

 results by this means the trees must be protected against ants, especially 

 the Argentine ant [Iridomyrmex humilis]. 



Predaceous insects which attack mealy bugs are : — the bro\vn lace- 

 wing {Sympherobius calif ornicus, Banks), which would be more valuable 

 if it were not itself parasitised by a species of Pachyneuron, another 

 Pteromalid, a Cynipid and the Chalcid, Isodromus iceryae ; the 

 Coccinellid, Hyperaspis lateralis, Muls., would also be more valuable 

 but for an internal parasite Homalotylus sp., which destroys large 

 numbers ; Cryptolaemus montrouzieri, Muls. ; Scymnus sordidus, Horn ; 

 S. guttulatus, Lee. ; *S. niarginicollis, Mann. ; S. bipunctatus, Kug. ; 

 Rhizobius ventralis, Er. ; the Agromyzid, Leacopis bella, Lw., which 

 is at present by far the most important enemy of P. citrophilus; 

 and the Syrphid, Baccha lemur, O.S., which is common in the 

 southern part of the State and is, at times, of considerable practical 

 importance. 



The parasitic enemies are : — Paraleptomastix abnormis, Gir. ; Cliry- 

 s&platycerus splendens, How., which seems to be confined to P. citri; 

 Pseudleptomastix squamulatus, Gir. ; Epidinocarsis subalbicornis, Gir. ; 

 Anagyrella corvina, Gir. ; and Pseudaphycus sp. 



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



1917. — Mthly. Bull. Cal. S'.ale Commiss. Hortic, Sacramento, vi, 

 no. 3 & 4, April 1917, pp. 119-120. 



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

 Aspidiotus cyanophylli and Selenaspidus articulatus on bananas. From 

 China : — Cylas formicarius in sweet potatoes ; Pseudaonidia sp., 

 Parlatoria sp., and Pseudommms citri on pomelos and oranges. From 

 Hawaii : — Pseudococcus bromeliae and Diaspis bromeliae on pineapples ; 

 Coccus longulus on betel leaves ; Bruchus sp. in seeds. Aster olecanium, 

 sp., Coccus hesperidum and Chrysomphalus aonidum on oleander 

 cuttings. From Japan : — Lepidopterous larvae in dead wood of 

 persimmon trees ; Pseudococcus sp. and cicada eggs on wistaria ; 

 cicada eggs on persimmon trees ; Cladosporium citri on oranges ; 

 larvae of Bruchus sp. in chestnuts ; Aulacaspis pentagona on peach ; 

 Chrysomphalus aonidum (ficus) and Hemichionaspis aspidistrae on 

 aspidistra ; a Coccid on pear ; Lepidopterous larvae in walnuts ; 



