AMERICAN COLEOPTERA. 125 



Var. rufus, Lee. — Body above, beneath and legs rufo- testaceous. Antennae 

 above black with pale basal joint. 

 Length .20 — .30 inch; 5 — 7.5 mm. 



Occurs from Greorgia to California. 



This is the only species of the genus in our fauna in which the 

 second joint of the hind tarsus is longer than the third. 



Rh. limbatns. Fab. Ent. Syst. L, 2, p. 112; Oliv. Ent. IIL, 65, p. 6, pi. 

 1, fig. 5, a— b; Say, Best. Journ. 1, p. 189; Gerst. Mon. p. .30.— Head pale rufo- 

 testaceous, occiput frequently black, vertex smooth, convex, impunctured. 

 Thorax similar in color with discal spot of variable size black, hind angles pro- 

 longed and slightly covering the elytral humeri. Elytra usually black, some- 

 times pale luteous with tlie entire limb, suture and base narrowly black. Body 

 beneath pale rufo-testaceous, frequently with the sternal side pieces black. 

 Anterior coxae separated by a slender, prolonged prosternum. Femora pale 

 tipped with black; anterior tibiae black, middle and posterior tibiae pale, apical 

 half black. Tarsi black, claws pale. Thoracic lobe not elevated nor notched 

 at tip. Second joint of hind tarsus shorter than third and broadly flattened 

 above. 



3Ia!e. — Antennae black, two basal joints pale. Female. — Similar. 



Length .24— .40 inch; 6—10 mm. 



This species occurs from Pennsylvania to Texas. 



Rli. liuearis, Lee. New Species, 1866, p. 154. — Form linear, color piceoua 

 with iridescence. Vertex convex, smooth, impunctured. Thorax sparsely 

 punctured, base on each side straight, hind angles not prolonged, lobe equila- 

 terally triangular, tip not elevated nor emarginate. Elytra as in limbatus. 

 Second joint of hind tarsus longer than half the third and not flattened above. 

 Body beneath shining black, sparsely punctured. Femora black, tibiae and 

 tarsi rufo-piceous. 



il/a^€.— Antennae black, two basal joints testaceous. 



Female. — Unknown. 



Length .16 inch; 4 mm. 



This species agrees with limbatus in having the anterior coxae sepa- 

 rated by a slender prolongation of the prosternum. 



One male is known. Collected by Mr. Ph. J. Wild, in Kentucky. 



Mr. Fred. Bates placed at my disposal a number of specimens with 

 the original labels, which formerly made part of the collection of 

 Count Dejean. These are as follows : 



R. diinidiatus. 



E.Jiavicornis= % (liiuidiatus. 



M. humeratus ^octomaCHla,tus var. Sayi. If this is the true humeratus 

 Fab., the name should be substituted for octomaculatus. 

 R. marginalis, ventralis, rubidus = varieties of pectiuatus. 

 R. affi-nis, zonatus = cruentus. 

 R. dtscicollis ^limhsitus. 



