270 University of California Publications. [Entomology 



Hippodamia ambigua Lee. 



The same general considerations may be applied for this 

 species as were given for H. convergens. The elytra, being red 

 and devoid of marking, easily serve to distinguish this species. 

 So far as known no detailed breeding has been carried on to de- 

 termine the exact relationship of these two forms. 



Oviposition. — Egg-laying records were secured for eight in- 

 dividuals, with results corresponding quite closely to those 

 secured with H. convergens. The maximum number secured in 

 one day was 24 and for the entire period 421, with a minimum of 

 199 and a general average of 312 eggs. The daily individual 

 averages ranged from 6.5 to 8.4, with a general average of 6.3 

 eggs per day. The total length of the egg-laying period ranged 

 from 25 to 59 days, averaging 48.1. The proportion of days upon 

 which eggs were deposited was 61.4 per cent, the variation being 

 from 48.0 to 25.0 per cent. 



Egg-Laying Eecords — Hippodamia amhigua Lee. 

 Berkeley, 1914 

 Date 

 March 2.5 

 26 

 27 

 28 

 29 

 30 

 .31 

 April 1 

 2 

 3 

 4 



8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 



