112 



THE MONTHLY BULLETIN. 



fact led Mr Compere and the writer to believe that it would be of great 



value in California. However, after having been given a thorough 



trial it seems to be unable to adapt itself to our conditions to such an 



extent that it will ever become a practical factor 



in the control of mealybugs, although it has 



become established and will probably he able to 



• maintain an existence, 



a round reddish spot 

 elytron. The larvae 

 resemble those of the 

 other species o f 

 Scvmnus. 



The"adult is black with 

 in tin- center of each 



Fig. 36. S c ii m n u 8 

 bipunctatus Kug. Im- 

 porter] from the Philip- 

 pines i>\ ill' i nsectarj . 

 ( ( Iriginal. I 



Rhizobius Ventralis 

 Er. 



This v a 1 u a b 1 e 

 beetle, like Crypto- 

 Icemus, was intro- 

 duced by Albert 

 Koebelc. from Aus- 

 tralia, in the early 

 nineties as an enemy 

 of the Black Scale. 

 While the latter in- 

 sed probably is its most important host, yet 

 it has been found at times to breed abun- 

 dantly upon the citrus mealybug. The 

 adult beetle is entirely black, and a little less 



than a quarter 



of an inch long. 



The larva?, too. 



are almost black 



in color and sparsely 



covered with spines 



or hairs. The beetle 



can he reared in con- 



H n e m e n t. b U t 



whether or not it can 



lie made of practical 



value by liberating 



large numbers in the 



infested groves re- 

 mains to be seen. 



Leucopis Bella I. new. 



This small fly is to 

 date by far the most 

 important enemy of the Citrophilus mealybug. 

 recenl trip to Riverside he found the puparia of this fly in great abun- 

 dance among the colonics of Citrophilus. The adnll fly is of a silvery- 

 gray color with certain distinct black markings. The egg is pure white. 

 oblong-oval in shape, ami delicately sculptured with longitudinal ridges. 

 The larva- are yellowish-brown in color, depending upon the host insect. 



Fig. 37. Larva of Scymnus 

 bipunctatus Kug. Showing 

 its close resemblance to 

 mealybugs. (Original. 1 



Fig. 38. The h 1 a c k 

 ladybird beetle, Rhizobius 

 Di ntralis Er. Larva and 

 adult greatly enlarged. 

 (After Kssig. ) 



During the writer's 



