THE CANADIAN ENTOMOLOGIST, 201 



c. Each elytron with more than one vitta besides the sutural one. 



First vitta free from the suture for its entire length, the fourth 



interrupted. .28-30 in exclamationis, Fabr. 



First vitta uniting with the sutural, second and third con- 

 fluent towards the apex, fourth much reduced. .22-.28 



in conjuncta, Rog. 



cc. Each elytron with broad sutural and one lateral vitta, thorax 

 with black or dark brown discal mark of variable size, rarely 



reaching the base. .20-. 2 5 in ekgans, Oliv. 



bb. Thorax unicolorous, brownish, more or less bronzed. Elytra 

 with from one to three stripes besides the sutural. 



d. Last joint of palpi very large. .24-32 in lunata, Fabr. 



dd. Last joint of palpi moderate. 



Claws approximate, form more oval. .21-. 26 



in siittiralis, Fabr. 



Claws not approximate, form more oblong. 



,24-. 30 in similis, Rog. 



AA. Elytra with irregular spots, forming more or less labyrinthine pat- 

 terns ; sometimes coalescent, but not forming regular stripes 

 except close to the suture. 

 e. Thorax green. 



f. Elytra with spots well separated. 



Suture green, first vitta coalescent with 



it. .28-40 in. {^\g. 2\.).. scalar is X'^^- 



Suture not green, first vitta free. .24-.35 



in pliiladelphica, Linn. 



ff Elytral spots coalescent, forming a reticu- 

 late pattern. .30 \n..Jabyriiithica, Stal. 

 ee. Thorax either entirely pale or with front 

 margin so ; elytral spots very numerous. 



.26-35 iri multipunctata, Say. 



The variety of iniiltipioutata called Bigsbyana by Kirby is distin- 

 guished by the large, dark basil thoracic spot. C. spircce, Say, is cata- 

 logued as a variety of philadelphica., and seems to form a link between 

 that species and scalaris, since the sutural line is common and is joined 

 to a shorter lateral one on each side near the base. An interesting paper 

 on the group AA, by Mr. G. W. J. Angell, may be found in the first 

 volume of " Entomologica Americana." His investigations go to show the 

 extreme difficulty of sharply separating the species, though the majority 

 of specimens will give no trouble in their identification. 



