FAMILY CHRYSOMELID^. 131 



green spots which converge to each other, the outer the largest : parallel with the 



marginal line there are three large spots ; the remainder are scattered and smaller. 



The dots are distributed somewhat irregularly, but there is a tendency to arrangement 



in rows, as at the base of the elytra and along the lines and larger spots. 



The insect; from which the description is drawn is rather common, but it does not agree 



with the description of the philadelphica by Kirby, who malies no allusion to the markings 



upon the thorax. The dififerences I regard as sexual. 



In a few plates, I observe that the ground color is too green ; it should be pale, or 

 cream-color. 



Chrysomela decipicns. 



Head, thorax, body and scutel dark green : elytra silvery white or white. Sutural line 

 thickened, and divergent near the scutel : the parallel and proximate lines wide, 

 divergent before, and narrowed towards the apex ; the second is shorter, and united 

 to it ; and the third is similar to two heavy dashes united at their points, but instead 

 of being straight, they form a curve divergent from the other lines : these lines are 

 dotted. The shoulders are marked by a heavy dash or oblong spot : two other spots 

 are situated between the shoulder spot and marginal line ; the upper roundish, and 

 the lower oblong. There are thirteen spots on each elytrum, besides those already 

 described, each of which is enclosed by a row of dots. Antennae, palpi and legs rufous. 

 This species differs from the preceding, in having the thorax entirely of a dark green, 



and also in the distribution and form of the lines and markings upon the elytra. 



Chrysomela scalaris. ( Plate xiv, flg. 10.) 



Head, thorax, body and scutel dark green : elytra silvery white. Sutural line green, and 



extending to the base : a coalescing line falls into it just below the scutel, and forms 



with it an unequal stripe. There are two oblique dashes, which do not meet, on each 



elytrum. The spot upon the shoulder is double, and prolonged in the form of a curve, 



and there is another curved spot between the shoulder spots and sutural line. There 



are three coalescing spots upon the posterior flexure of the elytra. The other spots are 



arranged somewhat in two lines, parallel with the outer margin of the elytra ; and 



there is a solitary dot near the middle, and upon the outer margin of the elytra. The 



(lots are so arranged that they follow the boundaries of the spots. Antennse, palpi and 



legs rust-brown. 



In the specimen figured, a brownish color predominated instead of the silvery white : 



it may be a distinct species from the scalaris, and is found in the autumn upon varioiifl 



plants. 



