1911] Heredity in Adalia 285 



considered as intergrading forms to some extent. This form 

 presents a rather strikingly different appearance from the rest 

 of the group, since all of these characters seem as a rule to go 

 together, making a rather pronounced gap in the series of 

 variation. It seems indeed to be closer to coloradensis than to 

 annectans. Furthermore, among the 109 annectans which 

 were reared from eggs of two annectans females and two melano- 

 pleura-annectans hybrid females, mated with one annectans 

 male and one melanopleura male, not one of these forms 

 appeared, which fact seems to show that it is not a common 

 fluctuating variation at least. It seems that the heredity 

 might be segregate and experiments are now in progress to 

 determine this point. It is on this account that I have thought 

 best to call attention to it separately though for the rest of this 

 paper it will be included under annectans. 



Coloradensis Casey, Fig. E, PI. XIX, is described as follows: 

 Head black with fine apical margin of whitish, and triangular 

 pale spot next each eye as found in annectans. Pronotum 

 black with very fine apical pale margin sometimes obliterated, 

 the posteriorly pointed median pale dash from the apical 

 margin very small when present, sides with same pale pattern 

 as melanopleura but lacking the black lateral spot, basal mark- 

 ing absent. Elytra brownish red, about the same color as 

 melanopleura, with a duplex black spot at the middle, some- 

 times in the form of a band, sometimes appearing as two sep- 

 arate spots, also a similar series of spots, two in number at 

 apical fourth, the inner one the larger. Legs and size as in 

 melanopleura, but the shape perhaps a little more narrowly oval. 



Humeralis, Say, Figure D, Plate XIX ; Head same as in melano- 

 pleura, except that sometimes a different pattern appears as 

 shown in Figure D, Plate XIX. Pronotum black with fine apical 

 line and narrow side margins pale, apical line sometimes oblit- 

 erated, basal marking always absent. Elytra black with a 

 large oblong yellowish red to bright red spot at humerus and 

 another small round one at three-fifths and close to the suture. 

 The red marking on the elytra seems identical with the red 

 pattern above mentioned as appearing in some specimens of 

 annectans. Legs and size same as given for melanopleura, shape 

 usually a little more rounded posteriorly. 



The work with these forms was at first undertaken merely 

 for the purpose of obtaining specimens for life history drawings 

 of melanopleura and annectans. In rearing these forms the 



