1856.] 



37 



E. 



28. C. i n t e r u p t a. Oblong, elongate, black ; thorax black, with a yellow 

 margin thickened ; elytra pale yellow, with six spots on each more or less con- 

 fluent ; legs bluish black, with tibiae ferruginous. 



Length. -25 -35. 



Fabr. El. 1, 438. Oliv. Ins. 91, 558, tab. 8, fig. 119. 



Locality. Middle States, Southern States, Lake Superior, Nebraska and Ore- 

 gon. 



This species varies much in color, the specimens I have examined may be 

 classed under the following varieties, though intermediate forms occur : 



1. The two anterior spots confluent ; two middle spots confluent ; and the two 

 posterior spots confluent, forming a very broad band ; legs bluish black, with 

 tibiae ferruginous ; under surface bluish black. 



2. The two anterior spots confluent, having the shape of a horse shoe ; the 

 Jwo middle spots separate and the two posterior confluent, but much more nar- 

 row than in 1. 



3. With none of the spots confluent ; legs bluish black ; tibiae pale yellow, 

 under surface black, with the four last segments of the abdomen slightly marked 

 with yellow. 



4. In which all the spots have disappeared, with the exception of the two 

 middle ones ; legs blue, black, with the tibia ferruginous, under surface black. 



5. The two anterior spots confluent ; the middle separate, and the posterior 

 confluent ; legs and under surface ferruginous, except the sides of the pectus, 

 which are black. 



6. None of the spots confluent; legs ferruginous ; under surface of the thoraj: 

 black. 



29. C. s c r i p t a . Oblong, elongate, black ; thorax black, with a yellow 

 margin thickened ; elytra yellow, coarsely and sparsely punctured, with seven 

 elongate spots on each elytron, two at the apex, slightly elongate, three at the 

 middle very elongate ; and two at the base, the one nearest the suture slightly 

 elongate, the other broad and very elongate. 



Length. 2'7 -35. 



Fabr. El. 1, 438. Oliv. 5, 559. Oliv. Enc. Meth. 5, 119? 

 Locality. Middle States, Southern States, Nebraska and Lake Superior. 

 In two specimens the thorax is dark red, with a yellow margin, and the under 

 surface black with the legs ferruginous. 



30. C. confluens. Oblong oval, black, head and thorax black, thorax 

 with a wide yellow margin, elytra brownish black, finely and sparsely punctured, 

 with four very faint oblong ferruginous spots on each elytron, antennae, legs and 

 under surface black. 



Length -28. 



Locality. Oregon, one specimen. 



Closely allied to C. o b s o 1 e t a of Say, but differs from it in the form of the 

 body, being wider in proportion, also in having the elytra more finely punctured. 



31. C. obsoleta. Oblong oval, head and thorax tinged with green, margin 

 of the latter yellowish, thickened, with a black insulated point; elytra brownish 

 black irregularly punctured, margin, tip and obsolete lines before and behind 

 the middle yellowish, antennae legs and under surface black. 



Length -33. 



Ilelodes obsoleta Say, J. Acad. 3, 435. 

 Locality. Western States. 



Differs from C. confluens in the form of the body, being longer and more 

 narrow, also in having the elytra more coarsely and densely punctured. 



F. 



32. C. c a 1 i f o r n i c a . Oblong oval, dark green, thorax sparsely punctured, 



