598 STAPHYLINID A. 
5. Sunius substrictus. 
Elongatus, angustus, abdomine apicem versus paullo latiore, ferrugineus, antennis pedibusque pallide flavis, 
abdomine ante apicem nigricante ; elytris angustis, quam prothorax paullo longioribus et fere angustioribus. 
Long. 53 millim. 
Hab. Panama, Volcan de Chiriqui 8000 feet (Champion). 
Var. Plus minusve nigro suffusus, corpore interdum toto nigro. 
Hab. Panama, Volcan de Chiriqui 4000 to 8000 feet (Champion). 
This species is closely allied to 8. cognatus, but the head is without the conspicuous 
development of pterygia seen in that species; while from S. vilis the present insect is 
distinguished by the less parallel form, the elytra being a little narrower than the 
thorax, and the hind body more distinctly dilated from the base to beyond the middle. 
The male has a deep excision on the last ventral segment. 
The few examples found are unfortunately in very bad preservation. The two found 
at the elevation of 8000 feet agree in colour, and I have regarded them as the typical 
form: at the lower elevation three examples were found, and they all differ a little in 
colour; two of them are, I think, nevertheless, certainly the same species, but the one 
in which the body is entirely black may be distinct. 
6. Sunius subtilis. 
Elongatus, angustus, niger, opacus, antennis, palpis pedibusque pallide flavis, elytrorum apice testaceo marginato ; 
abdomine dense subtiliter punctato. 
Long. 5} millim. 
Hab. Mexico, 'Teapa (Pilate). 
Head oblong, broader than the thorax, densely and strigosely sculptured. Thorax 
rather broad, longer than wide, much narrowed behind and much rounded in front, 
densely and strigosely sculptured. Elytra a little longer than the thorax, slender, slightly 
narrower at the apex, the hind margin with a slender linear band of testaceous colour, 
densely asperate-punctate. Hind body slender, at the base very slender, densely and 
finely punctate. 
I have only a female, in bad condition, of this species, obtained from Chevrolat’s 
collection, where it was labelled S. prolixus, Er.; but it is not likely to be that insect. 
It is allied to the European 8. filiformis, but the head has distinct pterygia at the 
insertion of the antenne; the areolets formed by the sculpture of the head and thorax 
are much larger; the thorax is more slender and more narrowed behind; the hind body 
is more constricted at the base, and rather more finely punctate. 
7. Sunius signatellus. 
Perangustus, nigricans, antennis, palpis pedibusque pallide flavis, elytris sutura posterius margineque apicali 
testaceis; abdomine perangusto, lineari, dense obsoleteque punctato. 
Long. 43 millim. 
