172 THE CANADIAN ENTOMOLOGIST. 



A A. Front not greatly prolonged. 



b. Body short and stout, antennse thicker, hind tarsi stout, the joints 

 1-3 equally pubescent beneath. Prothoracic tubercle distinct, 

 elytra closely punctured. Colour varying from entirely black 

 to almost entirely testaceous ; or the thorax may be yellowish 

 while the elytra are black. Typical form has yellowish 

 elytra, each with two black stripes. .24-.36 m..bivittaia, Say. 

 bb. Body more slender, antennae more delicate, hind tarsi slender, 

 pubescence wholly or in part lacking beneath on second and 

 sometimes on first joint. 



c. Disk of prothora.x convex, slightly channeled, densely 



punctured. 



' • Prothorax longer than wide, elytra rather sparsely 



punctured, pubescence short and scant. Colour 



extremely variable, black to testaceous, elytra often 



vittate. .36-. 44 in longicornis, Kby. 



Prothorax broader than long ; blackish, pubescence 



very long. .36-. 44 in siibpilosa^ Lee. 



cc. Disk of prothorax flattened behind and prolonged into two 

 dorso-lateral tubercles. Colour variable, blackish to 

 testaceous, legs variable, but apparently with the base 

 of the femora at least always rufous, .24- 



.36 in proteus, Kirby. 



While definite information is lacking, it is probable that A. proteus 

 and A. pratensis breed in pine, since they are so frequently found on 

 piles of pine lumber. A. bivittata (Fig. 27) is to be collected on flowers 

 oi Anevione pemisylvaJiica. Mr. Leng calls the punctuation "sparse," 

 but it is rather close and coarse. 



Gaurotes, Lee. 

 G. cyanipennis, Say, is readily known by its bril- 

 liant colour. The body is black, shining often with a 

 purplish tinge, the elytra bright green, polished, the 

 antennse, legs and mouth-parts yellowish. The head 

 is distinctly but sparsely punctured, the prothorax al- 

 most smooth except at sides, the elytral punctuation 

 very distinct but widely separated. Length, .36-40 in. fig. 27. 



In Wisconsin I found this insect almost confined to Sumac blossoms, 

 It is said to have been found ovipositing on butternut, 



