346 STAPHYLINID. 
without emargination behind. Only three specimens have been found of this elegant 
insect. The one figured is a female. 
6. Xanthopygus morosus. 
Subdepressus, niger ; elytris nigro-viridescentibus, antennis palpisque rufis, abdominis segmentis duobus ultimis 
flavis ; thorace parcius punctato, seriebus discoidalibus a punctis lateralibus evidenter discretis. 
Long. 15 millim. 
Hab. Mexico, Cordova (Sallé); GuaTemMaLa, Senahu in Vera Paz (Champion). 
Antenne rather short and stout, the five penultimate joints transverse. Head with 
distant but very coarse punctures, the middle being, however, largely smooth. Thorax 
quite as broad as long, only sparingly punctate, the punctures consisting of two widely 
separated longitudinal series along the middle, and a few distant punctures on each side. 
Elytra of an obscure green colour, coarsely and rather sparingly punctate. Hind body 
only sparingly and coarsely punctate. 
The more depressed form, the shape of the thorax, and its sparse punctuation bring 
this species into the proximity of XY. faustus, Er. Only a single specimen has been 
found in each of the localities, and both of them are females. 
7. Xanthopygus rufipennis. (Tab. VIII. fig. 16.) 
Subdepressus, niger ; prosterno, pectore, scutello, elytris, antennis pedibusque rufis, tibiis omnibus femoribusque 
posterioribus plus minusve nigricantibus ; abdominis segmentis duobus ultimis rufo-testaceis. 
Long. 12-15 millim. 
Hab. Mexico, Oaxaca (Hoge); Panama, Bugaba, Volcan de Chiriqui 2000 to 4000 
feet (Champion). 
Head with distant coarse punctures, which are wanting on the middle. Thorax as 
long as broad, only sparingly punctured, the punctuation consisting of two widely 
separated longitudinal series, and some lateral punctures numerous in front, but not 
extending to the hind angles. Elytra and hind body only sparingly punctate. The 
male has a short notch on the last ventral plate. 
This species is very similar to X. morosus in form and sculpture, though so different 
in colour; in this respect it departs entirely from its congeners and agrees with a 
species of Belonuchus which was found by Hoge at the same locality and probably in 
company with the Xanthopygus. Hoge, however, has sent only one individual, but a 
good series was found by Mr. Champion. The Mexican example is a feeble individual 
and has the front and middle legs and the hind femora entirely pale. 
LAMPROPYGUS. 
Ligula subintegra, apice vix perspicue emarginato. Prothorax lineis lateralibus haud conjunctis, externa ad 
angulum anteriorem vix obducta, facie plana ante angulum fere nulla. ‘Tarsi anteriores dilatati. 
Abdomen segmentis dorsalibus 2°-4™ basi impressis. 
This genus is established for certain species which have been placed in Philonthus, 
