MADARUS.—MADARELLUS. 377 
Two females. Smoother and more rapidly narrowed posteriorly than JZ. ochreo- 
guttatus, the vestiture still sparser, the intercoxal portion of the prosternum hollowed 
anteriorly, the inner strie of the elytra (the first excepted) scarcely traceable, the 
anterior femora feebly dentate. 
25. Madarus ochreoguttatus, sp.n. (lab. XIX. figg. 11, lla, 2.) 
Oblong, subelliptic, shining, piceous; the sides of the prothorax and the entire under surface (except along 
the median third) clothed with scattered narrow ochreous scales, the similarly-coloured vestiture of the 
elytra mainly condensed into a dense spot at the base of each of the 3rd and 7th interstices and an 
angulate median fascia (extending from the 3rd to the 8th stria), the metathoracic episterna also with a 
dense ochreous streak. Head very finely punctate, transversely grooved between the eyes; rostrum 
strongly arcuate, rather longer than the head and prothorax, the basal half stout, closely punctate at the 
sides, the apical half more slender and almost smooth, the antenne inserted at a little behind the middle. 
Prothorax transverse, gradually narrowing from the base, constricted in front ; sparsely, minutely 
punctate on the dise, obliquely strigose at the sides. Scutellum small, subtriangular. Elytra oblong- 
subtriangular, transversely depressed on the dise anteriorly ; finely striate, the outer stric distinctly 
punctate, the interstices sparsely, minutely punctate, flat to near the apex, where they are narrowly 
costate. Pygidium small, transverse, subvertical. Beneath coarsely punctate along the sides, the bare 
median portion very much smoother, the flanks and anterior half of the prosternum rugose; the pro- 
sternum with two narrow sharply-defined sulci extending backward to the moderately broad flattened 
intercoxal space. Femora subclavate, unarmed. 
Length 5-54, breadth 23-27 millim. (Q.) 
Hab. Mexico, Toxpam in Vera Cruz (Sa/lé). 
Two females. ‘The prothorax in this insect (at least in the female) is a little less 
dilated than in the allied forms. The ochreous median fascia and the two spots at 
the base of each elytron are sharply defined. The prosternum has two narrow sulci 
as in Wf. bisulcatus. | _ 
MADARELLUS. 
Madarellus, Casey, Ann. N. York Acad. Sci. vi. pp. 466, 540 (1892) ; vii. p. 603. 
The type of this genus is the N.-American M. undulatus (Say) and various other 
species have since been added by Casey and Solari; Madarus ebenus (F.), M. laticollis 
and M. singularis, Boh., and Baridius impressus and B. fasciatus, Kirsch, also 
belong here. Madarellus is connected with Madarus by intermediate forms; but it 
ig convenient to retain the name for various moderate-sized or small, glabrous, species 
with a comparatively short, abruptly tubulate prothorax, uneven elytra, bisulcate 
prosternum, and sulcate femora, the anterior pair invariably with a conspicuous tooth 
or angular dilatation. With the exception of M. jalapanus, they are all somewhat 
cuneiform in shape, due to their relatively broad, transversely convex prothorax. 
The prosternal sulci are parallel or obiique, and sometimes confluent (as in Madarus 
illustris), receiving the base of the antenne in repose. The Central-American forms 
are somewhat numerous and difficult to separate satisfactorily. 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, November 1908. 3 CC 
