MADARUS. 370 
This is a form of J. vorticosus with the third elytral interstice very gradually 
widened towards the base and the dense ochreous streak continued along it to near 
the apex. M/. macrogrammus was found in abundance at Cerro Zunil and is contained 
in most collections from Guatemala. The single specimen from Guanajuato has the 
sides of the prothorax strongly rounded from the base. The anterior femora some- 
times have indications of a small tooth. 
21. Madarus bilineatus, sp.n. (Tab. XIX. fig. 7, 3.) 
Very like M. macrogrammus, but almost bare above (the ochreous vitta on the third elytral interstice 
excepted), the scales on the under surface and legs very small and inconspicuous; the upper surface 
a little smoother; the rostrum of the 2 with the apical portion abruptly narrowed and almost smooth ; 
the anterior tarsi of the ¢ slightly dilated and hairy, the anterior tibiz also with long hairs within. 
Length 53-64, breadth 21-2 millim. (¢ 2.) 
Hab. Mexico, Playa Vicente (Sallé), Cordova (Hége); GuaTeMALA, Chacoj in 
Vera Paz (Champion); Nicaracua, Chontales (Belt), Managua (Solari); Costa Rica, 
Talamanca, Reventazon (Biolley) ; Panama, Bugaba (Champion). 
% 
Numerous examples. ‘This insect bears exactly the same relation to MZ. macro- 
grammus as does M. distigma to M. vorticosus, and it is not improbable that all four 
of them may have to be treated eventually as forms of one variable species. For the 
present, however, it is best to keep them separate. ‘The scales are wanting on 
the upper surface (the streak or vitta on the third elytral interstice excepted) in 
M. distigma, M. bilineatus, and AZ. bistrigellus, but this does not appear to be due 
to abrasion. The elytral vitte in the present species vary in length, sometimes not 
extending beyond the middle. 
29. Madarus excavatus, sp.n. (Tab. XIX. figg. 8, 8a, ¢.) 
Somewhat fusiform, shining, piceous; clothed above with scattered, rather coarse, whitish scales, which are 
condensed on the prothorax into a submarginal stripe and on the elytra into various irregular sub- 
confluent streaks and spots (a spot at the base of the 3rd and 9th interstices, a streak at the middle 
of the 4th, and a spot near the apex, being perhaps the most conspicuous) ; the under surface and legs 
also set with small, hair-like, whitish scales, the metathoracic episterna with a dark streak of coarser 
scales. Head finely punctate, transversely impressed between the eyes; rostrum ( ¢ ) strongly arcuate, 
longer than the head and prothorax, gradually thickened towards the base, closely punctate, becoming 
smoother towards the tip, (@ ) smooth, slender, and less curved, with the short basal portion abruptly 
thickened and punctate, the antenne inserted at about the basal fourth or fifth in the two sexes. 
Prothorax rather broader than long, rounded at the sides, rapidly narrowed and feebly constricted in 
front; sparsely, very finely punctate on the disc, obliquely strigose on the flanks. Elytra triangular, 
broadly, transversely excavate on the disc anteriorly; sharply, narrowly striate, the interstices with 
scattered very minute punctures. Pygidium transverse, vertical in ¢. Beneath ragosely, a broad space 
down the middle sparsely and finely, punctate. Prosternum with a transverse impression in front, in 
the ¢ abruptly sloping from the broad, flattened, smoother intercoxal space. All the femora feebly 
dentate. Anterior tarsi in the ¢ clothed with projecting pallid bristly hairs. . 
Length 43-5, breadth 2-23 millim. (¢ 9.) 
Hab. Panama, Caldera in Chiriqui, Taboga I. (Champion). 
