CHROAPTOMUS. 437 
ante apicem, nigris; pedibus abdominisque apice testaceis; elytris crebrius ad basin dense subtiliter 
punctatis. 
Long. 8 millim. 
Hab. Panama, Volcan de Chiriqui between 2500 and 6000 feet (Champion). 
This is closely allied to B. mimeticus and B. pictipennis, though readily distinguished 
by the metallic colour of the head and thorax, and the longer and more closely punctate 
elytra, the punctuation being at the extreme base dense and fine. 
The male has six or seven short spines on the front femora, and two series of spines 
on the hind femora, and also a broad shallow emargination of the hind margin of the 
last ventral plate; the female has only one or two spines on the front femora, the hind 
legs being unarmed. 
Only three examples of B. similis have been found; the figure is that of a female. 
As will be seen on reference to the plates, this species bears an excessive resemblance to 
Pederomimus pectoralis. 
CHROAPTOMUS. 
Antenne longe post capitis marginem anteriorem inserts. Prothoracis seta lateralis elongata ad marginem 
lateralem propinqua. Palpi maxillares articulo secundo dilatato. Tarsi posteriores tenues, elongati, 
articulo basali quam articulus apicalis longiore. 
Although the Philonthus flagrans, Er., has remained associated with the other Phi- 
lonthi, yet as it differs from all the species of that genus known to me by the antenne being 
inserted in large fosse so as to be remote from the front margin, and by the remarkable 
characters of the male, these latter having, however, hitherto escaped observation, it 
must clearly form a separate genus. Whether the Brazilian P. celites, Kr., should be 
associated with it I do not know, the insect being unknown to me. 
1. Chroaptomus flagrans. 
Philonthus flagrans, Er. Gen. et Spec. Staph. p. 441°. 
Mas, Capite in medio anterius argute foveolato, labro fisso, opaco, in medio membranaceo. 
Fem. Capite in medio anterius foveolato, labro nitido, dimidiis haud distantibus. 
Hab. Mexico!, Mirador (Hoge), Cordova (Sallé), Jalapa (Mohr); Guatemata, Balheu, 
San Geronimo, Cerro Zunil 4000 to 5000 feet (Champion) ; Costa Rica (Van Patten) ; 
Panama, Volcan de Chiriqui below 4000 feet, Boquete 3500 feet, Caldera 1200 feet, 
(Champion).—Soutn America, Colombia! (Mus. Sharp), Venezuela. 
This is occasionally met with in great abundance; Mr. Champion found it flying 
about rotten fruits in the forest. A variety occurs in which the head of the male is 
rather larger, with the anterior impression large and deep and occasionally even 
punctate behind. 
