292 



Annals Entomological Society of America [Vol. X, 



spots. One of these, a female, was mated with its annectans 

 father and produced 3 small-spotted bipunctata and 2 typical 

 annectans. Another of this lot of first generation females was 

 mated with an annectans male from out of doors (Figure 9) 

 and the first egg patch resulted in 3 bipunctata, 2 fairly small- 

 spotted and one with a dot mesad of the elytral spots. The 

 second egg patch gave 1 bipunctata normal, 1 bipunctata with 

 spots reduced to dots, and 1 annectans. The original female 

 (Figure 8) was then mated with a small-spotted bipunctata 

 male (Figure 11) and 16 large-spotted bipunctata resulted. 



r,g.9 



Fig. 8. Bipunctata female from Iowa mated with atmectans male, and progeny. 



Fig. 9. Female of F'. generation of Fig. 8 mated with annectans male, and progeny. 



Fig. 10. Female of F'. generation of Fig. 8 mated with annectans male (father). 



Fig. 11. Bipunctata female of Fig. 8 mated with bipunctata male from Colorado. 



The 5 other females from Iowa were put together in one cage 

 with a bipunctata male (Figure 6) and from the eggs 95 beetles 

 were reared, all bipunctata, 2 small-spotted, 4 medium-spotted, 

 and the rest of the same size of spots as the parents. One of 

 the females was separately mated with a bipunctata male with 

 small spots (Figure 7), and there resulted 24 bipunctata with 

 spots the same size as the mother. 



From the bipunctata beetles taken in Colorado there were 

 also a considerable number of beetles reared. These were 

 taken in Denver on two occasions, ten on April 19th by Mr. 

 L. C. Bragg, and three on April 28 by Prof. C. P. Gillette. 

 The first lot consisted of 6 females and 4 males and the second 

 lot were all males and small-spotted. From one female (Fig. 12) 

 mated with a bipunctata male 29 beetles were reared in the first 

 generation, all apparently normal except that one was smaller- 



