454 STAPHYLINID A. 
hairs; the last ventral plate is prolonged in the middle, so as to form an abrupt lobe, 
the hind margin of which is feebly emarginate; the anal styles are dilated, except at 
the base, and the peculiar structure of the last ventral plate evidently influences their 
movements. 
Only three examples of this elegant insect have been found. The female is unknown. 
ODONTOLINUS. 
Palpi labiales articulo secundo quam ultimus breviore. Prosternum anterius transversim carinato-divisum. 
Coxe intermedize late distantes. Tarsorum unguiculi basi appendiculata. 
This genus is characterized by the possession of a structure absent from all the allies, 
viz. the claws of the tarsi being furnished with a tooth beneath. The tarsi are slender, 
but somewhat deplanate, and are very pubescent beneath, the basal joint of the hinder 
pair being much longer than the apical joint. The lateral line of the thorax is placed 
quite on its under surface, the lateral seta being thus remote from the marginal line; 
the true side-piece is very small. The male of the unique species has the hind femora 
spinose at the base, the front ones with several short spines in the middle. Thus the 
characters of the genus, independent of the unguicular structure, are a mixture of 
those found in Belonuchus and Pederomimus. | 
1. Odontolinus fasciatus. (Tab. XII. fig. 4.) 
Subdepressus, nitidus, rufo-testaceus ; elytris (basi excepta) abdomineque ante apicem nigris; prothorace 
seriebus dorsalibus 2-punctatis ; elytris parce minus fortiter punctatis. 
Long. 9 millim, 
Hab. Panama, Bugaba 800 to 1500 feet, Volcan de Chiriqui 2500 to 4000 feet 
(Champion). 
Although this insect has almost the coloration of Pederomimus salvini and P. nigri- 
pennis, it is distinguishable at a glance by the great diminution of the number of punctures 
on the thorax, there being only two in each of the dorsal series (one just behind the 
middle, the other some little distance behind the front margin), and two or three 
lateral punctures, all of them being fine. The scutellum is closely and finely punctate, 
but there are very few punctures on the elytra, and only two or three on each side of 
the head; the latter is canaliculate along the middle in front. The two black fascize 
on this insect are remarkably definite. 
The male has the front femora spinose in the middle beneath, and a small patch of 
black spines at the base of each of the hind femora, but there is no emargination of 
the last ventral plate; an example of this sex is figured. 
Ten examples were taken at Bugaba, and one on the Volcan de Chiriqui. 
