456 STAPHYLINIDA, 
posterior femora, and the front femora are armed with longer spines; there is no emar- 
gination of the last ventral segment. The female has no true spines on the hind femora, 
and those on the front femora are fewer and shorter than they are in the male. 
Mr. Champion captured about a dozen examples; the male is figured. 
2. Musicoderus gracilis. 
Niger; abdomine apice flavo, antennis articulis duobus ultimis albido-testaceis ; capite subcirculari; prothorace 
parum elongato, seriebus dorsalibus 5-punctatis, nitidissimo ad angulos anteriores et ad latera deflexa 
dense subtilissime punctulato; elytris parcius punctatis, singulo prope scutelli apicem impresso. 
Long. 11 millim. 
Hab. Nicaraeva, Chontales (Janson). 
Although only a solitary female example has been received, I have no doubt that it 
indicates a distinct species, though it is exceedingly similar to MW. cephalotes; it is a 
little more slender, and has the elytra more sparingly punctate, and the two terminal 
joints of the antenne remarkably definitely pale in contrast with the other joints, 
which are quite black. The spines on the front femora of this female are only three 
in number, and being quite short readily elude observation. 
PADERALLUS. 
Corpus subdepressum, fragile; antennis, pedibus palpisque elongatis, gracilibus. Prothorax lateribus deflexis, 
margine laterali oculto. Tarsi posteriores subtus longius setoselli, unguiculis magnis. 
The curious insect for which I propose this generic name is allied to such aberrant 
Philonthi (e.g. P. serpentinus) as have the prothorax slender and the marginal seta 
remote from the lateral margin; but in the insects I have just mentioned, the sides 
of the thorax are less deflexed, and the peculiar structure of the legs and claws is 
not developed: moreover, as the Philonthi in question will have to be removed from 
the genus when it can be submitted to a revision, this need not militate against the 
separation of the very peculiar Pederallus. There is probably an elongate lateral seta 
placed far from the prothoracic margin, but in the examples at my disposition this is 
removed. The sides of the thorax are so much deflexed that when viewed from above 
no part of the lateral margin can be seen., The prothoracic side-piece, though very 
small, is not displayed as in Pederomimus, but is inflexed as it is in Philonthus. The 
mesosternum is much produced between the coxe, and terminates in a very acute point, 
the middle coxz being contiguous. The hind legs are remarkably elongate, the femora 
being thickest at the base, the tibize without spinules, the basal joint of the tarsi a 
good deal shorter than the apical joint; the rather elongate claws are evidently of 
unequal thickness. Although the palpi are slender and rather elongate, I anticipate 
the genus will prove to be allied to Actobius rather than to Philonthus. 
