AMERICAN COLEOPTERA. 2 " 



ate. disc moderately convex, with a distinct transverse basal impression surface 

 coarsely and deeply punctate. Elytra wider than the thorax, subparallel, apices 

 obtusely rounded with the margin serrulate, disc tricostate, the costae with the 

 suture and margin moderately elevated and between them two rows of coarse 

 peep punctures. Body beneath smooth, shining. Legs black. Length .22 inch , 



5.5 millim. ... i . .i 



* The intermediate femora are much more distinctly serrulate than m 

 the preceding species, and the third joint of the antennae is longer than 

 the second, and about equal to the fourth and fifth together. These 

 characters with the greater distinctness of the basal thoracic impression, 

 the larger size and 'color serve to distinguish this species from the pre- 

 ceding. 



Occurs in Arizona and New Mexico. 



Ch Ariadne Newm.-Moderately elongate and shining, elytra distinctly 

 blue, thorax red, usually margined with black at apex and base. Thorax a little 

 wider than long, sides feebly arcuate in front, subparallel behind, disc moderately 

 convex with a feeble basal impression, surface coarsely and deeply punctured. 

 Elytra as in nigrita. Legs black. Intermediate femora scarcely visibly serru- 

 late. Length .15 inch; 3.75 millim. 



The third joint of the antennae is nearly as long as the second, and is 

 intermediate in this respect between the two preceding species. 



Occurs in Florida and appears to be rare. 



Ch Lecontei Baly.— Very similar to the preceding in color and sculpture. 

 It has* however, a wider thorax, the base of which is transversely impressed and 

 the disc at middle subcarinate. Length .20 inch ; 5 millim. 



Occurs in Florida, rare. Unknown to me. 



OCTOTOM1DES. 



Form oblong, depressed, obtuse and dilated posteriorly. Antennae short, 

 8-jointed,the last two forming an elongate oval club. Tarsal claws d.vergent. 

 Elytra with short oblique plicae, the intervals punctured. 

 OCTOTOMA Suff. 

 Antennae as long as head and thorax, first two joints oval, the second smaller. 

 third cylindrical a little longer. 4-6 shorter, each slightly broader and shorter 

 than the preceding, seventh obconical, eighth oval, subacute at tip, these two 

 forming an elongate club. Femora moderate, distinctly sinuate beneath near Up, 

 tibiae curved at base, the anterior more dilated than the others and with the outer 

 edge sinuate. Tarsi dilated, densely pubescent beneath, first joint triangular, 

 small, second broad and very deeply emarginate, third as long as the first two 

 and deeply bilobed, fourth but little longer than the lobes of the third, prolonged 

 at tip in an inter-unqual process, claws moderate, feebly curved. 



Our species differ from the generic description given by Chapuis in the 

 form of the femora and tibi* That author states that the femora have 

 a dentiform process beneath near the tip, and that all the tibiae are slen- 

 der. In our species they are as described above and the differences may 

 be specific only. 



