1911] Heredity in Adalia 301 



EXPLANATION OF PLATES. 

 PLATE XIX. 



Fig. A. Adalia melanopleura Leconte. 



Fit;. B. Adalia anneclans Crotch. 



Fig. C. Adalia anneclans Crotch. 



Fig. D. Adalia humeralis Say. 



Fig. E. Adalia coloradensis Casey. 



Fig. F. Adalia anneclans Crotch. 



Fig. G. Adalia melanopleura (more albinic form). 



FlG. H. Pupa of .1. anneclans, melanopleura, coloradensis, and humeralis. 



Fig. I. Larva of .1. anneclans, melanopleura, coloradensis and humeralis. 



FlG. J. Eggs of A. anneclans, melanopleura, coloradensis and humeralis. 

 All drawings are magnified 5 diameters. 



PLATE XX. 

 Fig. 1 shows in diagram the results of the foregoing experiments in inheritance 

 between anneclans, melanopleura, coloradensis, ami humeralis. The numerals be- 

 neath the circles in each case indicate the number of individuals in that class. The 

 lines connecting with higher circles indicate parentage in each case. 



Fig. 2. a and b — characters of anneclans-humeralis female, mated with males 

 indicated. 

 c to j — elytral characters of anneclans offspring. 



k to n — pronotal characters of melanopleura and anneclans offspring. 

 Numerals indicate number of individuals in the class in each 

 case. 

 FlG. 3. a — elytral characters of anneclans mother, mated with male indi- 

 cated. 

 b to o — elytral characters of anneclans offspring. 

 p to V — pronotal characters of anneclans offspring. 

 Numerals indicate number of individuals in each class. 



PLATE XXI. 

 Fig. 4. a and b — characters of melanopleura anneclans mother mated with 

 male indicated. 

 c to 1 — elytral characters of anneclans offspring. 

 m to / — protonal characters of anneclans offspring. 

 u to !' — pronotal characters of melanopleura offspring. 

 Numerals indicate number of individuals in each class. 

 Fig. 5. a and b — characters of melanopleura-annectans mother, mated with 

 male indicated. 

 c to d — pronotal characters of annet tans offspring. 

 e to k — elytral characters of anneclans offspring. 

 / to r — pronotal characters of melanopleura offspring. 

 Numerals indicate number of individuals in each class. 

 FlG. 0. Shows the curves representing the variation in the elytral characters 

 of the anneclans offspring, drawn in the foregoing figures. The numerals on the 

 left show the number of individuals. The degrees of melanism are designated by 

 the legend below in each case, the most albinic being at the extreme left and the 

 most melanic at the right. "Confluence J^"means one case of tendency to con- 

 fluence, "confluence |" means two cases of tendency to confluence. The latter 

 is here given a rank of its own as it does not seem equal in melanism to one full con- 

 fluence. The curve above the legend "spot G absent" does not represent all the 

 individuals lacking that spot, but only those with no case of confluence. 



Curve (a) represents the series in Fig. 2, Plate II. The full line triangle shows 

 the position of the mother in this series. 



Curve (b) represents the series in Fig. 3, Plate II. The broken line triangle 

 represents the position of the mother. 



Curve (c) represents the series shown in Fig. 4, Plate III. 

 Curve (d) represents the series shown in Fig. 5, Plate III. 



The mother of the series for curves (c) and id I were melanopleura and so have 

 no place in this diagram. 



