MUSICODERUS. 455 
MUSICODERUS. 
Palpi elongati, labiales articulo intermedio perelongato quam articulus basalis triplo longiore. Prothorax 
parum elongatus, lateribus valde deflexis. Prosternum anterius transversim divisum, parte anteriore 
brevi, parte posteriore evidenter strigosa. Coxe intermedie distantes. Tarsi posteriores graciles, 
articulo basali quam ultimus paulo breviore. Femora maris breviter spinosa. 
This genus will be distinguished from Belonuchus by the great elongation of the middle 
joint of the labial palpi, and by the much deflexed sides of the prothorax, as well as by 
the strigose posterior part of the prosternum. Musicoderus is equally close to Pedero- 
mimus, but has a different form of prothorax, this being abbreviate rather than 
elongate, and by the great elongation of the middle joint of the labial palpi; in this 
last character certain aberrant species I have at present placed in Paederomimus 
(e.g. P. nobilis) approximate to it. Although the division of the prosternum into two 
parts is not indicated by any definite carina, yet the condition of the surface of the two 
parts is so different as to render the two very distinct, the strigosity of the hinder part 
being probably better developed than in any of the Pederomimi; the bases of the front 
coxee near the strigose portion of the prosternum are also strigose, and I have no doubt 
this indicates a stridulatory function of these parts, for when the loosely articulated 
coxa is turned forwards the two strigose parts come into apposition. 
The genus is no doubt peculiar to Tropical America, and will comprise, in addition 
to the species here described, one or two nondescript Peruvian species. 
1. Musicoderus cephalotes. (Tab. XII. fig. 5.) 
Niger; abdomine apice flavo; antennis articulo ultimo ferrugineo; capite subcirculari; prothorace parum 
elongato, seriebus dorsalibus 5-punctatis, nitidissimo ad angulos anteriores, et ad latera deflexa dense 
subtilissime punctulato; elytris parce punctatis, singulo prope scutelli apicem impresso. 
Long. 10-11 millim. 
Hab. Panama, Bugaba 800 to 1500 feet (Champion). 
Antenne very slender, the basal joint very elongate, the penultimate joint much 
longer than broad. Head large, with numerous coarse punctures, which are absent along 
the middle in front, and with numerous, finer, subobsolete punctures at the rounded 
hind angles. Thorax rather small, narrowed behind, the anterior angles rounded, 
convex, the deflexed sides finely punctulate, and on each side of the middle with a 
dorsal series of five punctures, the anterior and posterior of these punctures being more 
separated than the others; between the dorsal series and the fine lateral punctuation 
there are five or six other punctures. Elytra very intense black, shining, rather finely 
and sparingly punctate, with a depression on each side of the apex of the scutellum ; 
this latter very densely and finely punctate. Hind body moderately closely punctate ; 
the terminal segment, the hind margin of that preceding it, and also the armature, 
yellow. 
The male has two series of short, distant spines along the hind margin of the 
