Pomona College .Iotrnal of Entomoloov 



fi05 



this point tlir operation Ims also bftn observed repentedlv. but eaniiibalisni is not 

 uncommon among |)redaceous insects. Though the good from tliis insect is often 

 great, I have often thought that the harm done, by eating other beneficial insects, 

 more than overbalanced the good done. For instance we imported the C'occinellid 

 enemy {Cryptolaemus montrou:irri) of tlie citrus mealy bug into our orchards 

 at Santa Paula and it was impossible to go into the field without finding nearlv 

 every chrysopid larva with the young of this ladybird beetle. In not a few 

 instances entire colonies were entirely destroyed, and though many of the mealy 

 bugs also fell a prey to the ehrysopids. they seemed to prefer the larva- of the 

 ('ryi)tolivmus. But other than this I have seen very little to count against it, and 

 as an a|)hid feeder alone the good is verv marked. 



Figure 197. Chrysopa californica 



Pupa — (Figure 1!>7 C and I)). When fully developed and re.idy to undergo 

 transformations it spins a thin, hard-walled, globular, pupa case about itself 

 (F'igure 197 C shows mouth open after escape of the adult. I) shows the cocoon) 

 in some crack or crevice and remains dormant for some time. These globular pupa 

 cases are often nearly covered with long white tilaments — not unlike cotton — by 

 which they are fastened, and arc grouped together in small lots or may be single. 

 It is this stage that is subject to severe attacks of internal parasites, which plays 

 havoc with rapid develo))ment of numbers. The parasite. Isotirnmut icerifar How. 

 is common here and has been reared in large numbers from the pupa eases of tin- 

 green lace wing and also from the |)Mpa- of the Hrowii I, ace Wing {Si/mphiTohiut 

 augustiis Banks). 



.Idult — (Figure 197 F- and F'). The adult insect is from tive-sixteenths to 

 three-eights of an inch long and twice as long including the length to the tip of 

 the folded wings, of a beautiful green color with a longitudinal, dorsal, yellow 

 band extending from the front of the head to the penultimate al>dominal segment. 

 There are four large, membranous wings, wonderfully nerved (from which comes 



