SOME NORTH AMERICAN INSECTS. 163 



9. A.fallax. Elytra with about three spots on each, which exhi- 

 bit a different reflection. — Inhab. Indiana. 



Brassy-greenish: head green, sometimes cupreous on the vertex; 

 impressed line hardly obvious : thorax with a dorsal and lateral in- 

 dented line ; the former more obvious behind, the latter oblique and 

 dilated ; more or less tinged with cupreous ; an arcuated, elevated line 

 at the posterior angles ; posterior angles acute : elytra with the basal 

 indentation, subsutural spot behind the middle, composed of minute 

 prostrate hairs, producing a different reflection from that of the gene- 

 ral surface ; tip denticulate : beneath blackish-brassy. 



Var. ./2. Dull cupreous ; thorax brighter. 



Length more than one-fifth of an inch. 



Distinguished by the elytral spots offering a different reflection from 

 the remainder of the surface. In some positions they are hardly ob- 

 vious; but seen from before or behind they are distinct, particularly 

 the posterior one. 



10. A.putillus. Thorax transversely indented before and behind 

 the middle ; elevated line of the posterior angle none. — Inhab. Indiana. 



Body blackish-brassy : head greenish ; longitudinal impressed line 

 very distinct: thorax with a transverse indentation before, a much 

 larger transverse indentation behind the middle, and a more profound 

 lateral one parallel with the lateral margin; posterior angles destitute 

 of an elevated line, rectangular or rather more obtuse ; elytra, basal 

 indentation ovate-oblong, oblique; tip denticulated, from the suture to 

 the middle concave ; suture rather prominent. — Length over one-tenth 

 of an inch. 



Only three of the before mentioned species are destitute of an ele- 

 vated line at the posterior thoracic angles, viz. the rujicollis, bilineata 

 and lateralis, to these we may add the cogitans, Weber. From all these 

 the present is separable by its inferior size, excepting the lateralis, 

 which has no denticulations at the tip of the elytra. One of my spe- 

 cimens has the head green before. 



11. A. otiosus. Line of the thoracic angles short and obtuse; front 

 but slightly punctured. — Inhab. Indiana. 



Body greenish, or brassy-blackish, rather slender: head with the 

 punctures obsolete, excepting on the vettex, where they are not pro- 



VI. 2 Q 



