BELONUCHUS. 431 
middle with a discoidal series of five punctures. Elytra and hind body rather sparingly 
and finely punctate; the latter with rather more than one half of the penultimate 
segment, the whole of the terminal segment, and the armature pallid yellow. In 
the male the clypeus is produced on either side in the middle so as to form a short 
thick projection or tooth ; the front femora are dilated behind near the extremity, and 
coarsely spinose; the hind femora densely set with two series of closely placed spines ; 
the terminal ventral plate scarcely emarginate. 
Very closely allied to B. xanthopterus, but rather smaller, and with less punctate and 
setose hind body, and with the head in the male different, and also with a larger extent 
of the penultimate segment pale. 
6. Belonuchus formosus. 
Staphylinus formosus, Grav. Mon. p. 72’. 
Belonuchus formosus, Er. Gen. et Spec. p. 426 *. 
Hab. Uniren States, Carolina!, Pennsylvania.—Muxico, Jalapa (Flohr, Hége), 
Oaxaca (Sallé, Hoge), Teapa, Capulalpam, Playa Vicente (Sal/é); British Honpuras, 
Rio Hondo (Blancaneaux); GuatEMa.a (Salvin), near the city, San Gerénimo, Capetillo, 
Cahabon in Vera Paz (Champion); Nicaragua, Chontales (Janson); Panama, Bugaba 
(Champion).—Sovta America, Colombia ?, Brazil. 
There are three varieties of this species, viz.:—1. A very small form, as described by 
Gravenhorst 1, slender, with fuscous antenne, the base and apex of which are more or 
less indefinitely paler, the palpi entirely clear yellow, and the hind femora of the male 
with their armature so much reduced that the few spines are not easily perceived; this 
variety I have seen only from Mexico and the United States. 2. The most common 
form has the antenne black, with the base more or less picescent, as are also the palpi, 
these latter, however, being sometimes nearly yellow, with the exception of the basal 
joints of the labial pair, which are always picescent. 3. A variety with the base and apex 
of the antennz definitely yellow, and the palpi entirely clear yellow, the punctuation 
of the elytra rather closer and finer, and the setosity of the penultimate segment greater ; 
these two latter varieties occur from Mexico to Brazil. It has hitherto escaped record 
that the hind femora of the female are unarmed. The species is recorded in the 
Munich Catalogue under the name of B. rufipennis, Fabr., Erichson having stated that 
the Fabrician type of Staphylinus rujipennis is the present species; the description of 
Fabricius is, however, so definitely erroneous that his name cannot be adopted, for he 
not only omits to mention the red hind body, but reiterates “ corpus atrum.” 
7. Belonuchus pollens. 
Rufus; capite cum antennis, thorace, scutello, pectore anterius, coxis quatuor anterioribus abdominisque 
segmentis duobus ultimis nigris; palpis piceis ; elytris parce, abdomine crebrius, punctatis. 
Long. 11-14 millim. . 
Mas. Femoribus posterioribus tantum ad basin rude spinosis. 
