ORPHNEBIUS.—SCEPTOBIUS. 211 
2. Orphnebius similis. 
Brevior, nitidula, testacea, capite thoraceque piceis; capite parvo, valde transverso ; prothorace valde trans- 
verso, anterius subtruncato, posterius rotundato; elytris brevibus, sed quam prothorax longioribus et 
latioribus ; abdomine lato, levigato. 
Long. 3} millim. 
Hab. Panama, David, Chiriqui (Champion). 
This species is very closely allied to O. lativentris; but the head is considerably 
broader and shorter, and the antenne are more elongate; these organs are clear yellow, 
and the penultimate joints, though transverse, are not so short as they are in 0. lati- 
ventris. 
Two individuals have been found, both males. The last dorsal plate terminates in 
three broad, rounded, very short teeth; and there is at the base of the central tooth a 
tubercle or large granule; the outer margin of the plate bears an elongate raised line. 
A third individual, found on the Volcan de Chiriqui, at an elevation of 3000 or 4000 feet, 
may also pertain to this species; it appears, however, to be rather larger and more 
elongate, and the antenne are dark in colour; this may, however, be the result of 
the excessively decayed condition of the specimen. 
SCEPTOBIUS. 
Caput collo discreto sat angusto, oculis minutis. Tarsi anteriores 4-, intermedii et posteriores 5-articulati, 
articulo basali elongato. Apterus, elytris omnium brevissimis, abdomine dilatato. Coxe intermedi 
contigue. Metasternum fere nullum, parapleuris maximis. Sexus differentia maxima. 
The position and exact affinities of the remarkable Myrmecophilous insect for which 
I propose this genus cannot at present be definitely decided, as it appears to be some- 
what similar to Malagria and Drusilla; it is near the latter genus that I advise its 
location in the meantime. All I can see of the trephi is the maxillary palpi; and these 
are of the type usual in the Aleocharini. ‘The head is exserted and carried on a very 
definite narrow (but not extremely narrow) neck. The prothorax is not margined at 
the sides; and its lateral portions are merely deflexed; the exposed portion of the pro- 
sternum is large, and produced between the front coxze so as to be quite acuminate 
behind; the front coxs are very elongate; the middle coxe are contiguous and 
prominent, and no portion of the metasternum can be seen except the very large side- 
pieces, which have a great extension inwards towards the coxe, but are not visible 
from above. The male has the antenne and legs much longer than they are in the 
female; and in this latter sex the eyes are extremely rudimentary, consisting of a few 
scarcely united granules; even in the male the eyes are quite. small and not visible 
from above. 
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