LeConte. ] 608 [April 18, 
This species and nebulosus are the only ones in which a distinct sinua- 
tion occurs on each side of the middle of the base of the thorax. 
Occurs from Pennsylvania to Georgia and Missouri. 
(4.) L. didesmus Lec. loc. cit. p. 15. 
Similar in form, color and sculpture to the preceding, and differing as 
follows : 
Club of antenne rather compact, three-jointed, the eighth joint, however, 
slightly wider than the seventh, terminal joint oval, not as wide as the 
preceding. Thorax rather coarsely punctate, not alutaceous, basal im- 
pressions wanting, basal margin squarely truncate. Elytra coarsely and 
moderately truncate, punctures not in striz, pubescence partly erect not 
striate, color piceous, shining, each elytra with an oblique humeral yellow 
spot, another slightly behind the middle and also oblique, extending from 
the margin to the suture. Length 2.25 mm.; .09 inch. 
The yellow markings vary somewhat in extent. 
Occurs from Pennsylvania to Florida. 
(5.) L. nebulosus Lec. loc. cit. 
Resembles didesmus in form and sculpture. The antennee are as in fef- 
raspilotus. The thorax is as coarsely punctured as the elytra, and not 
alutaceous, basal impressions wanting, basal margin sinuate on each side 
of middle. Elytra coarsely punctate, pubescence partly semi-erect but not 
striate, the color is usually testaceous, with a piceous dentate band behind 
the middle, another one-third from apex. Length 1.5-2 mm. ; .06-.08 inch. 
This is our smallest species. It is usually of much paler color than the 
others, and the elytral markings are sometimes reduced to scattered piceous 
spots. 
Occurs in the Middle States. 
Table of species of TRIPHYLLUS. 
Elongate, not convex ; prothorax strongly margined at the sides....... 
elongatus. 
Elongate-oval, convex ; prothorax finely margined at the sides. .ruficornis. 
33. Rhizophagus brunneus Horn, nu. sp. Uniformly brownish, 
moderately shining. Head sparsely punctate. Thorax a little larger than 
wide, apex and base truncate, sides sub-parallel at middle, slightly arcuate 
at apex and base, disc convex, coarsely and sparsely punctured. Elytra 
slightly wider at base than the thorax, and feebly emarginate, disc with 
rows of moderately coarse punctures which become somewhat finer to- 
ward the tip. Prosternum coarsely punctured, side pieces nearly smooth. 
Metasternum smooth at middle. Abdomen coarsely and sparsely punc- 
tured, the first segment smooth at middle. Pygidium sparsely punctate. 
Length 3 mm.; .12 inch. 
