484 THE MONTHLY BULLETIN. 



INSECT NOTES. 



The ladybirds Cryptolwmus montrouzieri Mulsant, and Hyperaspis lateralis Mulsant, 

 are doing effective worlc against the citrus mealy bug, Pseudococcus citri (Risso), in 

 certain sections of Los Angeles County and in the Sweetwater Valley section of San 

 Diego County. — E. J. Branigan. 



The Solanum mealy bug, Pseudococcus solani (Ckll.), is reported from Escondido as 

 injuring tomato vines. — H. M. Armitage. 



The "Western twig borer, Amphicerus punctijiennis (Leconte) has been found work- 

 ing in prunings from an orange orchard in San Diego County. In one limb the burrow 

 measured twelve inches in length. — H. M. Armitage. 



Scymnus sordid^ls Horn is another predator which is aiding in the control of the 

 citrus mealy bug, Pseudococcus citri (Risso), in the vicinity of Pasadena. — E. J. Bran- 

 igan. 



The cypress mealy bug, Pseudococcus ryani (Coq. ), is being controlled by the lady- 

 bird Hyperaspis lateralis Mulsant, in the Golden Gate Park at San Francisco. The 

 larvae of this ladybird are very conspicuous during the spring months and are often 

 mistaken for mealy bugs on account of their white cottony covering. — Harold Compere. 



Bamboo at Sierra Madre is heavily infested by Asterolecanium hambusw Bdv. — 

 E. J. Branigan. 



Scymnus coniferarum has been found working upon Pseudococcus pini in Golden 

 Gate Park at San Francisco. — Harold Compere. 



Norfolk Island Pine, Araucaria excelsa, is heavily infested with the golden mealy 

 bug, Pseudococcus awilanatus (Mask.) in Pasadena. Scy^nnus guttulatus Lee, and 

 Scymnus sordidus Horn, were found to be breeding upon this mealy bug. — E. J. 

 Branigan. 



Scymnus marginicollis Mannerheim is another species of the Coccinellids, which is 

 feeding upon Coccidse in the Golden Gate Park at San Francisco. — Harold Compere. 



Camphor trees are heavily infested with the red scale, Chrysomphalus aurantii 

 (Mask.), in Pasadena. — E. J. Branigan. 



Raphidia ohlita Hagen is frequently encountered in Golden Gate Park during the 

 summer months. — Harold Compere. 



Experiments have been conducted in the Pasadena and Upland sections of I^os 

 Angeles County against the mealy bugs infesting citrus groves. The trees were 

 sprayed with water, using a pressure of 250 pounds, witli very satisfactory results. — 

 E. J. Branigan. 



During the past summer Sinodendron ruposum (Mann.) was present in limited num- 

 bers in the canyons about Ukiah, tunneling in the partially decayed trunks of alders, 

 birches and laurels. The male of this insect is characterized by a conspicuous horn 

 on the head. — Harold Compere. 



The mealy bug, Pseudococcus sp., which is infesting citrus trees at Upland, Cali- 

 fornia, is present in considerable numbers this season. The infestation is quite bad 

 on the Grevillea trees bordering the roads. The saine mealy bug can be found on the 

 peach, plum and apple trees, also on rhubarb plants bordering infested citrus groves. 

 The green lacewing, Chrysopus californica Coq., the brown lacewing, Sympherobius 

 anffustus Banks, and a species of Leucopis were the only beneficial insects found to be 

 attacking this mealy bug. The green lacewing was found to be heavily parasitized by 

 several species of parasites. — E. J. Branigan. 



The Monterey pine weevil, Pissodes radintw was reared from a Pimis silvcstris 

 sapling during the early part of September. The infestation by this weevil occurs in 

 only one part of Golden Gate Park. — Harold Compere. 



