Pomona Coi-lege Journal of Entomology 



605 



tliis point till- operation lias also hccii observed repeatedly. I)iit eaniiihalisin is not 

 uncommon among iiredaoeous insects. Though the good from this 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 Coccinellid 

 enemy {Cryptolaemiis moiilroiislcri) of the citrus mealy bug into our orchards 

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

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

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

 bugs also fell a prey to the chrysoi)ids, they seemed to prefer the larvsp of the 

 Cryptolaemus. But other than this I have seen very little to count ag.ainst it, and 

 as an aphid feeder alone the good is very marked. 



Figure 197. Chrysopa calif ornica 



Pupa — (Figure 197 C and D). ^\'hen fully developed and readv to undergo 

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

 (Figure 197 C shows mouth open after escape of the adult, D 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 filament.s — not unlike cotton — bj- 

 which they are fastened, and are 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 development of numbers. The parasite, Isodromus iceri^ae How. 

 is common here and has been reared in large numbers from the pu])a cases of the 

 green lace wing and also from the pupa? of the Brown Lace Wing [Symplierobius 

 augustus Banks). 



Adult — (Figure 197 E and F). The adult insect is from five-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 abdominal segment. 

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



