362 STAPHYLINIDA. 
black. S. cupripennis, Guér.-Mén., is also very closely allied, but is larger, has a black 
thorax, a larger head, and more closely punctured head and thorax. 
Only two individuals have been obtained of S. flavicaudus; they are males. The 
femoral crenulation is very coarse, and does not extend quite to the apex; the terminal 
ventral plate is very slightly emarginate. 
4. Styngetus championi. 
Niger; thorace vix subviolaceo-micante, elytris violaceo-eeneis ; prothorace ad latera crebre fortius punctato, 
area lata longitudinali levigata; abdomine subtiliter minus sparsim punctato. 
Long. 16 millim. 
Hab. Guatemaa, San Gerdénimo, Sabo, Cubilguitz and Balheu in Vera Paz (Cham- 
pron). 
This species is very closely allied to S. flavicaudus; but it has the hind body 
uniformly deep black and a little less scantily punctate. Although excessively similar 
to S. deyrollei, it is readily distinguished by the concolorous hind body. The male 
characters are the same as in S. flavicaudus. 
The species appears to be somewhat rare, as only five individuals have been 
obtained. 
5. Styngetus anticus. (Tab. IX. fig. 5.) 
Niger ; capite thoraceque vivide violaceo-cyaneis, elytris aureo-violaceis; abdomine parce punctato. 
Long. 13-15 millim. 
Hab. Costa Rica, Volcan de Irazu 6000 to 7000 feet (Rogers) ; Panama, Volcan de 
Chiriqui between 4000 and 6000 feet (Champion). 
This is, again, very closely allied to S. deyrollei, but the extremely beautiful colour 
of the head and thorax very readily distinguish it from all the allies. This character 
appears to be invariable in the series of twelve examples before me. In the male 
the crenulation of the hind femora extends to the extremity, and there is a rather 
distinct emargination of the last ventral plate. 
The figure is drawn from one of the Chiriqui females. 
OCYOLINUS. 
Palpi omnes elongati, tenues ; ligula integra ; mandibulw valde elongate, pone medium dente magno instruct, 
apice tenui curvato. Tarsi anteriores in utroque sexu dilatati, subtus spongiosi. Abdominis segmenta 
basalia absque lineis impressis curvatis. 
This genus is distinguished very well by the above combination of characters, and 
will comprise, in addition to O. amethystinus, two or three other undescribed species 
from Northern South America; the characters of the genus are taken, indeed, from 
