-XANTHOLINUS. 483 
This obscure insect has no salient feature by which it can be recognized, but I have 
quite failed to reduce the examples to variations of any of the allied species. The third 
joint of the antenne is quite small, evidently shorter than the short second joint; both 
head and thorax are oblong, the normal number of punctures in the thoracic series of 
the latter being apparently seven or eight. 
I have treated some of the examples found on the Volcan de Chiriqui as a variety of 
this species, though they are somewhat larger and darker in colour, have a closer 
punctuation on the side of the head, an increased number of punctures (there may be 
as many as eleven) in the thoracic series, and a more definite punctuation of the elytra, 
a dorsal series of punctures being quite evident. 
22. Xantholinus vilis. 
Minor, nitidus; capite nigro; palpis, pedibus elytrisque testaceis, antennarum basi rufa; prothorace seriebus 
dorsalibus multipunctatis, capite utrinque sat crebre fortiter punctato ; prosterno posterius carinato. 
Long. 5 millim. 
Hab. Mexico (Truqui), Guanajuato, Cordova (Sallé), Jalapa (Hoge); GuaremaLa, 
near the city, San Gerdénimo, Torola, Capetillo, Panajachel (Champion). 
This is yet another species very closely allied to X. darus, but is smaller and narrower, 
and readily distinguished by the pallid elytra, which are picescent only at the extreme 
base. The antenne are rather small and slender, the second joint rather longer than 
the third. The thorax is slightly narrowed behind; the usual number of punctures in 
the thoracic series is nine, but it varies from seven to eleven, it being usually the larger 
individuals that possess the smaller number. The prosternum is pallid ; the punctuation 
of the elytra is scanty, but shows a distinct series along the middle. 
A considerable series was obtained of this obscure insect ; it is, indeed, probably one 
of the commoner Staphylinide of our region. 
23. Xantholinus salvini. 
Elongatus, angustus, depressus, pallide piceus; antennis pedibusque testaceis, his apicem versus latioribus, 
articulis secundo tertioque sat elongatis; prothorace seriebus dorsalibus 9-11-punctatis. 
Long. 5-6 millim. 
Hab. Guatemaa (Sallé), near the city (Salvin), San Gerénimo (Champion). 
This is similar to some of the varieties of X. vilis, but isa very distinct species, 
readily recognizable by the colour and structure of the antenne, and by the prosternum 
being quite destitute of carination. The head is coarsely but not rugosely punctate on 
either side. The thorax is slender and elongate, distinctly narrowed behind ; the dorsal 
series are irregular, and there are in addition about fifteen punctures on each side 
irregularly placed. ‘The elytra are not longer than the thorax, are very shining, 
sparingly but somewhat coarsely punctate, without distinct discoidal series. The under 
surface is paler than the upper, nearly yellow. 
3 QQ 2 
