174 



THE CANADIAN ENTOMOLOGIST. 



spaces between these costfe being occupied by two irregular rows of 

 coarse, deep punctures. It is extremely variable and the varieties have 

 received names as follows : suil/a, Fabr., is applied to the form in 

 which the head and thorax are brown with slight metallic lustre ; costi- 

 pen?iis, Cr. ( Crotchii, Lefvr.), to those specimens with brilliantly metallic 

 head and thorax and brown elytra with yellow costte ; while flavida. Say, 



is the yellowish - testaceous form, 



merely a little darker beneath. 



[Horn.] Length, .16-. 24 in. Fig. 



17 represents C. flavida, natural 



size and magnified. Fig. 18, the 



larva, highly magnified. 



Rhabdopterus, Lefvr. 

 The insect formerly known in 

 collections as Colaspis prcetexta., Say, has been re- 

 ferred to this genus, and Dr. Horn has substituted 

 the older name, picipes, Oliv., therefor. It will there- 

 fore stand as Rhabdopterus picipes, Oliv. It is a rather 

 brilliant bronzed or greenish insect, .16-.20 in. long, of oblong-oval form, 

 very convex above. The antennje are testaceous with darker tip, under 

 surface of body greenish, abdomen brown, tip paler, legs testaceous. 

 Elytra with coarse, irregular punctures on the disk, apex substriate. 



Fig. 17. 



NoDONOTA, Lefor. 



Includes species formerly placed in Colaspis. Our species are all 

 rather small insects, of convex form, something like Colaspis, but shorter 

 in proportion ; in colour more or less metallic, bluish or greenish, legs 

 piceous or testaceous. Dr. Horn separates the three species (formerly 

 recognized only as varieties) found in our region as follows : — 

 Form short, oval, punctuation of prothorax simple. 

 Upper surface shining ; metasternum not punctate at 



sides. . 1 1-. 1 5 in tristis, Oliv. 



Upper surface dull ; metasternum coarsely punctate 



at sides. . 1 5-. 1 8 in .^ co?ivexa, Say. 



Form oblong, subparallel, punctuation of prothorax substrigose ; 

 elytra with distinct costa behind the umbone. 

 . 1 3-. 1 7 in puncticollis, Say. 



