74 



EVOLUTION IN COLOR-PATTERN OF THE LADY-BEETLES. 



Genus ANATIS Mulsant. 

 30?5. Anatis quindecimpunctata Oliv. 



Distribution: Northeastern United States and Canada. 



The dark form mentioned by Leng may well be an age difference, so 

 much does appearance change in specimens when kept alive. There is, 

 however, variation of spots (figs. 80 and 81 ) . 



Form A. Inner apical spot absent. 



Form B. Scutellar and subsutural intermediate spots confluent. 



d 



FIG. SO. Variation in pronntal pattern in Anntix quindecimpunctata. /<=rnode. All from Stony Lake, 

 Michigan. 



FIG. 81. Variation of elytral pattern of A nntis mail and quindecimpunctata. <i and b= o ninli. All from 

 Stony Lake, Michigan. 



3075. Anatis mali Say. 



Distribution: Michigan, Indiana, Wisconsin, Idaho, and Washington. 



The variation of the pattern (figs. 81 and 82) seems to be continuous. 

 There are intergrades of A. quindecimpunctata towards the two costal 

 spots of A. mali. The pronotum and shading of elytra, however, distin- 

 guishes it sharply from A. quindecimpunctata. Its range is within that 

 of quindecimpuctata, which is probably the parent species. 



FIG. 82. Variation of pronotal pattern in Anntix UK///. a=mode. All from Stony Lake, Michigan. 

 Fiu. s:.!. Variation of color-pattern of Amilis leamtci. From Southern Arizona. 



3076. Anatis rathvoni Leconte. 



Distribution: California and Oregon. 



Form A. With some or all of the spots placed as in A. quindecimpunctata indistinctly 

 indicated. 



30f6 a. Anatis lecontei Casey. 



Distribution: Colorado, New Mexico, and Arizona. 

 The black limb is variable in extent (fig. 83). 

 Form A. Without the basal spots on the pronotum. Throughout the range. 



