I04 CASEY 



elytra violaceous blue to green, varying with angle of light, thickly and 

 uniformly, finely spotted with fulvous yellow, the spots more or less 

 transversely confluent, a transverse band behind apical third, which is 

 continued broadly on the suture to the apex, devoid of spots; under 

 surface ( $ ) coppery with greenish reflection, without paler maculation, 

 or (c?) having the median parts from the head to near the apex of the 

 first ventral pale yellow, with a small yellow spot at each side of the 

 fifth ventral; head (9) without pale spots, rather coarsely, densely 

 punctate, the eyes rather prominent, or (c^) ver)' densely and more 

 finely punctate; prothorax two-thirds wider than long, the sides evenly 

 converging, almost evenly and moderately arcuate from base to apex; 

 surface even, evenly convex, without impunctate areas, the smooth 

 median line interrupted anteriorly, the punctures coarse, very dense 

 laterally; elytra but little wider than the prothorax, parallel, nearly 

 twice as long as wide, the sides gradually oblique in more than apical 

 third, the apices obliquely rounded, the sutural angle not at all promi- 

 nent; surface with equal, moderately convex, finely and sparsely punc- 

 tate interv^als, the stride closely and evidently punctate; abdomen very 

 finely, sparsely punctate, the first segment narrowly flattened along the 

 median line. Length (9) 16.0 mm.; width 5.7 mm. Kansas (Ed- 

 mond) , — Warren Knaus. [ = confluens Lee] confluenta Say 



A — Nearly as in confluenta throughout, the arcuate elytral band free from 

 maculae not prolonged posteriorly on the suture, the prothorax shorter, 

 with the lateral punctures still more confluent, the impunctate me- 

 dian fine entire, the side margins with a pale point at the apical angles 

 and another near the base; head (d^) finely, very densely punctate 

 and much more pubescent; last ventral ((^) with an entire transverse 

 pale fascia from side to side near the base, the punctures stronger 

 than in the female of confluenta and less sparse. Length (c?) 14.7 

 mm.; width 5.0 mm. Texas tessellata n. subsp. 



29 — Elytral striae more or less fine, with small, even, less close-set punctures. 

 Atlantic regions, extending westward nearly to the Rocky Mts 30 



Elytral striae sulciform, densely and more confusedly crenate, the inter- 

 vals relatively narrow; median line of the pronotum generally more 

 impressed. Pacific regions, extending eastward in the north as far as 

 Lake Superior 34 



30 — Body very elongate, in great part pale beneath, the legs at least in part 

 pale, the elytra each with an anterior vitta from the basal margin 31 



Body less elongate, without paler areas beneath, the legs always black with 

 more or less metallic lustre, the elytra variously maculate with yellow. .32 



31 — Legs entirely pale in color. Body only moderately convex, shining, 

 metallic green, the anterior parts frequently bluish to aeneous; lateral 

 parts of the sterna metallic green, the remainder of the under surface 

 variegated with yellow and brownish-red, the latter prevailing on the 

 abdomen, the former forming a broad but broken axial vitta from the 

 head to the middle of the abdomen, apparently in both sexes, the sides 



