1911] Heredity in Adalia 299 



These results seem to furnish conclusive evidence 



1. That coloradensis is a good variety or type equal with melanopleura, 

 annectans, and humeralis, acting as a unit character in heredity. 



'2. That when crossed with annectans, coloradensis produces a blended 

 hybrid, in both elytral and pronotal characters, namely the form 

 above referred to as an albinic form of annectans. 



3. That when crossed with melano pleura a blend is produced in the 



pronotal characters, identical with the annectans blend; but in 

 the elytra melano pleura dominates entirely.* This form was 

 mentioned in the description of melanopleura as a "more albinic 

 form." 



4. That when crossed with humeralis coloradensis dominates perfectly 



so that the hybrid form is indistinguishable from the pure strain 

 of coloradensis. 



It seems that in every instance the more albinic character 

 dominated over the more melanic one ; for example : immaculate 

 elytra, in melanopleura, dominate over the spotted ones of each 

 of the other forms. The absence of the black lateral dot in the 

 pronotum, in coloradensis, dominates over its presence in each of 

 the other forms. The presence of the whitish basal marking on 

 the pronotum, of annectans and melanopleura, dominates over its 

 absence in coloradensis and humeralis. The absence of the 

 basal elytral spots, in coloradensis, dominates over its presence 

 in annectans. The usual absence of confluence in the median 

 and apical series of spots in annectans dominates over the con- 

 fluence in these spots in coloradensis. Humeralis which pre- 

 sents the most melanic characters in every particular in both 

 elytra and pronotum is perfectly recessive to each of the other 

 forms. 



The inheritance of the faint lateral dot on the elytra in 

 melanopleura was observed in the specimens at hand but no 

 law was ascertained. It seems to be a mere fluctuating 

 variation. 



The single humeralis beetle mentioned in the article as 

 appearing among the first generation offspring in the 4th cross 

 in the table, between humeralis and melanopleura parents, was 

 tested in breeding. It proved to be a male and was put into a 

 cage with two humeralis females, from the eggs of which seven 

 progeny were reared to maturity. All of these were humeralis 



* This statement is to be reconciled with the statement in the foregoing ar- 

 ticle that melanopleura is dominant over coloradensis by the fact that at that time 

 the hybrid was considered as only a variant of melanopleura. 



