NORTH AMERICAN COLEOPTERA. 49 



This and texanns closely resemble each other and diflfer in the form of 

 the thorax and the character of the pubescence. The antennae are 

 longer in the present species, and in the female of this are as long as in 

 the male of texanns^. 



Occurs from Florida to Texas. 



LUDIUS Latr. 

 L. attenuatus Say, Trans. Am. Phil. Soc. vi, 1839, p. 166; Lee. Trans. Am. 

 Phil. Soe. n. s., x, p. 455 ; Cand. Mon. iv, p. 298, pi. iv, fig. 6. 

 fmcus Cast. Hist. Nat. 1, p. 240. 

 L. LeContei Horn, Trans. Am. Ent. Soc. 1871, p. 31.3. 

 L. ater Cand., Mem. Belg. xvii, 1865, p. 55. 

 L. pinguis n. sp. 

 L. abruptus Say, Ann. Lye. l,p. 253: Lee. loc. cit. p. 455; Cand. loc. cit. p. 306 



coracinus Germ. Zeitsehr. Iv, p. 47. 

 L. texanus Lee. loc. cit. p. 308. 

 L. hepaticus Germ. Ins. sp. n. \t. 43 ; Lee. loc. cit. p. 453 ; Cand. loc. cit. p. 307 



AKCHASTUS Lee. 

 A. frontalis n. sp. — Form elongate, pale chestnut-brown, moderately shining, 

 clothed with fine fulvous pubescence. Antennae extending beyond the hind angles 

 of the thorax, feebly serrate, the second and third joints small, together barely as 

 long as the fourth. Front honey-yellow, (accidental ?) moderately coarsely not 

 densely punctured. Thorax as long as wide at base, sides gradually, arcuately 

 narrower to the apex, hind angles not divergent, bicarinate, the carinse well 

 elevated, the outer long and not very close to the margin, disc convex, surface 

 moderately coarsely and closely punctured, the punctures coarser and closer at the 

 sides. Elytra not wider than the thorax, parallel at basal two-thirds, then grad- 

 ually narrowing to apex, surface with faint punctured striae which become evanes- 

 cent near the apex, the intervals very slightly convex near the base, rather closely 

 punctulate. Body beneath more shining than above moderately closely punctate, 

 the last ventral segment more finely punctate. Free angle of coxal plate rounded 

 and more prolonged than the inner angle. Length .40 inch; 10 mm. 



This species resembles sericeus in color but is more slender. As in 

 the latter the second and third joints of the antennae are. small and together 

 shorter than the fourth, a character otherwise unknown in our species. 

 In sericeus the dilated portion of the coxal plate is truncate in the 

 present species more prolonged and rounded. The color of the head 

 may possibly be accidental in the only specimen I have seen and I there- 

 fore lay very little stress upon it. 



One specimen Las Vegas, New Mexico, Prof. Snow. 

 A. militaris Cand. 



This species is rather small, black, the elytral humeri with a large 

 orange yellow spot. In my cabinet there is a specimen totally black 

 without spot which in all other respects agrees with the typical form. 



Western Nevada, Morrison. 



TRANS. AMER. ENT. SOC. XII. (11) JANUARY, 1885. 



