MALACODERMATA. 307 
is convenient to separate from Silis, and which will, I believe, prove to be congeneric with 
the above-named insect. It is very similar in size and in its black colour, and, indeed, 
at first I thought might be identical. It is one of the smallest members of the whole 
family, and recalls in appearance an Attalus or Anthocomus. 
1. Plectonotum labiale. 
Aterrimum, nitidum ; ore et antennarum articulis duobus primis flavis, pedibus piceis; prothorace transverso, 
angulis anticis obsoletis, margine laterali et frontali reflexo, incrassato, ante angulos posticos exciso. 
Long. 3 millim. 
Mas? Antennis corporis longitudine. 
Femina? Antennis quam corpus brevioribus. 
Hab. Panama, Volcan de Chiriqui 2000 to 4000 feet (Champion). 
Head and thorax shining, black, the former pale in front of the insertion of the 
antenne. ‘The antenne in the male (?) as long as the body, simple, with a rather long 
curved basal and a very short second joint ; the third and following joints as long as the 
basal and second together; in the female the third joint is shorter than these. The 
thorax has its disc convex, and faintly impressed in the middle. The elytra are shining, 
very finely and confluently punctured. The legs are pitchy, with pale trochanters 
and coxe. Many examples were captured. ) 
PARASILIS (to follow the genus Plectonotum). 
Antenne articulo secundo elongato, quam tertius vix breviore; in utroque sexu simplices, filiformes. Palpi 
maxillares articulo ultimo modice dilatato, cultriformi, margine interno compresso, leviter curvato ; labiales 
articulo ultimo triangulari. Mandibule falcate, acute, basi intus compress et ampliate, haud dentate. 
Maxille breves, validx, unilobate. Prothorax margine laterali fere simplici, maris parum sinuato. Pedes 
longi, unguiculis muticis. Abdominis maris segmentum septimum tenuiter fissum? Llytra integra sat 
dura, abdomen tegentia, creberrime sat fortiter punctata, apicibus leviuscula. 
This genus is formed to receive two species of Telephoride of a very perplexing 
aspect. They are apparently members of the section to which the species here referred 
to Silis belong, and scarcely would have been separated by me from them but for the 
negative evidence of the absence of nearly all the especial characters by which those 
species, as a group, are known to me. ‘The mandibles are not bent as in some females 
of Silis ; the claws are not split or lobed. ‘The second joint of the antenne is not short, 
and, indeed, is longer than in any species of Szdis. ‘The fission of the seventh ventral 
segment of the males is not distinct, if, indeed, it really takes place (which, in the 
wrinkled state of very many of the segments, is not easy to ascertain). The thorax is 
nearly (but not quite) free from any plication or thickening of the margin by which the 
sexes can be known. The elytra are firmer than in any other Telephorid I can recall ; 
and the general resemblance to a species of Cleride of the genus Colyphus is so strong 
as to suggest the idea that these species are not properly placed in this group. The 
only European genus to which I can liken it is Pygidia, from which, however, it differs 
in all its details, except the strong punctuation of its elytra. 
2h 2 
