RHIPIDOPHORUS. 361 
fine scattered punctures on the basal portion of the disc; elytra shining, with rather coarse, scattered, 
shallow punctures, the humeri smooth; metasternum sparsely punctured ; abdomen above and beneath 
smooth, almost glabrous, the apical segments only finely and sparsely pubescent; legs stout, the tibix 
widened and strongly compressed ; the first joint of the hind tarsi about as long as the following two 
joints united, stout, very strongly compressed, and deeply emarginate at the apex above, the second joint 
more than twice as long as the third; wings hyaline, their basal two-thirds suffused with yellow, a trans- 
verse fascia beyond the middle and the costa smoky, 
Length 9 millim, 
Hab, Mexico, near the city (Schumann). 
One female example. A large species, readily separable from its allies by the smooth 
and shining thorax and abdomen; the latter is reddish-yellow, with the apical segment 
black. In its smooth thorax &c. this species agrees with the description of R. popenot 
(Lec.), from Colorado, but it differs in numerous particulars; the female only of 
R. popenot was known to Leconte. 
3. Rhipidophorus flaviventris. (Tab. XVI. fig. 21, 3.) 
3. Comparatively narrow, black, pubescent; the elytra piceous, with a broad yellowish fascia (not reaching 
the outer margin) about the middle, the apical margins reddish; the antennz fusco-testaceous ; the 
abdomen reddish-yellow, with the base and the extreme apex stained with piceous ; the legs black, with 
the tibial spurs and the claws reddish-yellow. Head closely and rather coarsely punctured, the front 
concave; the vertex strongly transversely raised in the middle, and thickly clothed with erect fuscous 
hairs; antenne with the rami very long and slender; prothorax canaliculate in its median third, 
thickly and finely punctured at the sides, base, and apex, the disc smooth except for a few coarser punc- 
tures about the middle; elytra moderately shining, coarsely and rather thickly punctured, the interspaces 
minutely punctate, the humeri smooth ; abdomen sharply carinate along the middle above from the base 
to the apex, above and beneath with widely scattered fine punctures, the first two dorsal segments almost 
smooth ; legs stout, the tibize broad and compressed ; the first joint of the hind tarsi short, not longer than 
the apical one, very stout, strongly compressed and much raised, very deeply emarginate at the apex 
above, the second joint also stout and compressed, more than twice as long as the third ; wings suffused 
with yellow throughout, the basal half of the costa reddish-brown, a patch on the costa beyond this 
smoky. 
Length 83 millim. (¢.) 
Hab. Guatemaa, Cerro Zunil (Champion). 
One male example. In this species the dorsal surface of the abdomen is carinate 
along the middle from the base to the apex, the abdomen itself (in the dried speci- 
men) being narrow and parallel; the rami of the antenne are very slender and curled; 
the two basal joints of the hind tarsi are compressed, the first joint very strongly so ; 
the elytra are coarsely punctured ; and the legs are black, the spurs and claws excepted. 
The vertex is more strongly raised than in the same sex of FR. rex. 
BIOL. CENTR. AMER., Coleopt., Vol. IV. Pt. 2, December 1891. 38 AA 
