AMERICAN COLEOPTERA. 19 



var. pulchella, Hbst.— (PI. I, fig. 22.) 



A marginal band from humerus to middle gradually broader behind 

 and sinuate within, several dorsal spots, two transverse fasciae between 

 the middle and apex. 



This variety occurs most commonly from Pennsylvania to Georgia. 



var. arizonae. — (PI. I, fig. 25.) 



Form slender. Elytra with marginal stripe extending from humerus 

 to middle, terminating in a narrow transverse band nearly reaching 

 the suture, a moderately large basal spot, two transverse fasciae behind 

 the middle and a subapical spot. 



One specimen from Arizona and several, more robust, from Florida. 

 var. mixta, Lee. — (PI. I, fig. 26.) 



In this form the basal spot becomes larger and longer and sends 

 branches to the side, the first transverse fascia at middle becomes 

 broader and sends a branch forward, the two posterior bands are also 

 broader and frequently broken up. 



This variety occurs in Texas, Colorado and Utah. 



var. immaculata. 



Elytra entirely yellow, or with the umbones tipped with brown. 

 This I have from Owen's Valley, California and Utah. 

 This is probably the most widely distributed species in our fauna 

 as will be seen by the above given localities. 



A. obtusa, n. sp. — (PI. I, fig. 29.) Form robust, subdepressed, nearly as 

 obtuse posteriorly as in front, surface greenish blue, sparsely clothed with 

 short biack hair, thorax yellow at the sides, elytra with median basal spot, 

 three irregular transverse bands and apical spot yellow. Head coarsely and 

 densely punctured, front feebly impressed, vertical carina obsolete. Thorax 

 more than twice as wide as long wider at middle than at bas3, apex truncate, 

 at middle slightly prolonged over the head, base truncate, sides rather strongly 

 arcuate, margin narrow and entirely invisible from above; disc with feeble 

 median line terminating in a very vague basal impression, a very slight fovea 

 at base on each side of middle; surface moderately coarsely and densely punc- 

 tured, equally over the entire surface. Elytra as wide at base as the thorax, 

 umbone feebly prominent, sides subparallel or very feebly converging, at apical 

 fourth arcuately narrowing to an obtuse apex, sides very finely serrate near the 

 tip; disc striate over the entire surface, strise coarsely and deeply punctured, 

 intervals flat, rather coarsely punctate; surface greenish blue marked with a 

 median basal spot, three irregular transverse bands and an apical spot, yellow. 

 Body beneath bluish green, sparsely pubescent. Prosternum as in pulchella. 

 Abdomen coarsely and moderately densely punctate especially on the last two 

 segments. Length .36 — .40 inch ; 9 — 10 mm. 



Eight specimens from Texas. This species cannot be confounded 

 with any other than some of the varieties of puklwlla from which 

 the form of thorax will distinguish it. 



