ANNALS 



OF 



The Entomological Society of America 



Volume X DECEMBER. 19 17 Number 4 



ADDITIONAL NOTES ON HEREDITY AND LIFE HISTORY 

 IN THE COCCINELLID GENUS ADALIA MULSANT. 



By Miriam A. Palmer. 



In 1911 an article was published by the writer in the Annals 

 of the Ent. Soc. of America, entitled "Some Notes on Heredity 

 in the Coccinellid Genus Adalia Muls. " This paper comprised 

 all of the forms of Adalia at that time known to the writer to 

 have been taken in Colo., viz., melano pleura Lee, amiectans 

 Crotch, coloradensis Casey, and humeralis Say. These forms 

 were all found to interbreed freely, the different types acting 

 as Mendelian units. In the spring of 1916 experiments were 

 begun for the purpose of determining the biological relation 

 between these forms and A. bipunctata Linn. 



Adalia bipunctata Linn, as dealt with in this paper may be 

 described as follows: Head black, with two white spots 

 bordering the eyes. Pronotum pale with black M-shaped 

 design with the broad pale margins, except in rare cases, 

 immaculate instead of the black lateral dot as in ^. annectans. 

 Elytra brownish red with a rather large rounded black spot 

 in the center of each. Legs black or brownish black. Length 

 4-5.5 mm., width 3.5-4 mm. 



The appearance of the egg and larva in all stages seems 

 indistinguishable from the rest of the Adalia group studied.* 

 The color of the egg varied from pale lemon yellow to strong 

 orange. This difference of color seemed to have no real signifi- 

 cance, as eggs of both colors were laid by the same female and 



*See Annals Ent. Soc. of America, Vol. VII, 1914, p. 228. 



289 



