222 



INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



THE TWO-STABBED LADYBIRD BEETLE 



Chilocorus bivulnerus Mulsant 

 i Fig. 204) 



Description. — The adults arc broadly oval and 

 The color is shiny black with two round, blood 

 elytra. The extreme margins 

 of the prothorax are pale. The 

 underside of the abdomen is 

 red. The larva' are very spiny, 

 dark in color, with a" yellow 

 transverse band across the 

 middle. 



Distribution. — This is one of 

 the commoner native ladybird 

 beetles and is to be found in 

 almost every part of the State. 



Hosts. — The larva 1 and adults 

 are voracious feeders upon the 

 pernicious or San Jose scale, 

 Aspidiotus perniciosus Comst., 

 the young' of the black scale, 

 Saisseiia olece (Bern.), mealy 

 bugs, oyster-shell scale, Lepi- 

 dosa pin s ulmi (Linn.), Euro- 

 pean or Italian pear scale, 

 Epidiaspis piricola (Del Guer- 

 cio), the European elm scale. 

 Gossyparia ulmi (Linn.) and 

 other scale insects. 



about jV; inch long, 

 red spots upon the 



FiK- 204. — The two-stabbed ladybird beetle, 

 Chilocorus bivulnerus Muls. Larvae, pupje and 

 adults, enlarged slightly more than twice. 

 (Original > 



THE MEALY BUG DESTROYER 

 < 'ryptolcemua montrouzieri Mulsant 



(Figs. 205, 206 A) 



Description.— The adults are as large as 

 the ordinary red ladybird beetle, but de- 

 cidedly pointed posteriorly. They are 

 black, with the head, prothorax and pos- 

 terior ends of the elytra cinnamon red, and 

 the entire body is covered with fine, light 

 hair. The larva- are yellow and covered 

 bu? i& dl s 5 t^e U " O Cr^oS£witJi long filaments of white flocculence 

 montrouzieri Muls. Greatly en- (Fig. 206 A). The eggs are regularly oval, 

 larged. (Author's illustration, P. & n j i n T1 



C. jr. Ent.) very small and lemon yellow. 1 hey are 



deposited singly among the eggs of the 

 mealy bugs and are therefore very difficult to find. 



Distribution. — This species was introduced into California by 

 Albert Kcebele and is redistributed from time to time by the State 



