MALACODERMATA. 291 
1 (a). Silis nodicollis, 
Nigro-fusca, parum nitida; capite, prothorace elytrisque ochraceis tenuiter pubescentibus. Antennis brevibus, 
compressis, dense pubescentibus, articulo secundo perbrevi, tertio ad decimum oblongo-subquadratis interne 
paullo serratis; prothoracis disco infuscato, rugoso, subopaco, circiter medium tuberculis nonnullis irregu- 
laribus, lateribus sinuatis, margine bicalloso, reflexo, Elytris distinctius tricostatis. Long. 73-8 millim. 9°. 
Femina, Mandibulis fortiter curvatis, abdominis segmento apicali leviter emarginato, in medio lwvigato, nitente. 
Hab. Panama, Volcan de Chiriqui, 2000-3000 feet (Champion). 
Var. Occipite nigrescente, elytris nigro-fuscis, humeris ochraceo-plagiatis. 
Hab. Guatema.a, Capetillo, San Gerénimo, San Juan in Vera Paz (Champion). 
An extremely difficult species to apprehend. The type from the Volcan de Chiriqui 
is evidently the female of a species of which I have not yet seen the male, and with it 
I am obliged to associate several examples from different localities, which are all females, 
but agree in having the antenne densely pubescent, and more rigid, and with the joints 
more closely connected than usual; at the same time all these specimens have the strongly 
bent jaws such as occur in S. odlita, and a small thorax nearly as wide as long, roughened 
with granulations and tubercular ridges, so that the whole insect most wonderfully 
resembles some of the Lycide; it is nevertheless undoubtedly a Telephorid. 
There are specimens of this, or a closely allied species, from Mexico—Juquila 
(Boucard), Toxpam and Tuxtla (Sallé), which so nearly resemble S. varians as to be 
with difficulty separated, and which, for want of further material, I cannot assert to 
be conspecific with or distinct from this species. 
Silis varians (p. 92). 
Var. Nigra; capite prothoraceque flavis, hoc vitta mediana illo occipite nigricantibus, elytris humero et 
margine basali flavis. 
Hab. Guatemata, Dueiias, Torola (Champion). 
Several very closely allied species have to be discriminated here; the type of 
S. varians is a male example from San Joaquin. The specimens from Teleman I now 
separate under the name of S. combusta. The specimens from Panima with some 
others, including a large series collected in the State of Panama, I describe further on 
as S. serrigera. ‘The characters given will suffice for their distinction, S. varians being 
smaller than either of its allies on the average, and among other characters I observe 
that the divided subapical segment of the abdomen appears to gape more than in other 
allied species, the fourth joint of the tarsi has its two lobes free, the antenne are only 
moderately serrate or flattened, and are shorter than in S. serrigera. 
2(a). Silis plateroides, 
Ochracea, leviter pubescens; elytris costatis; occipite antennis, tibiarum apicibus tarsisque nigris, abdomine fusco; 
prothorace subquadrato, disco insequali, nitidulo, margine laterali ante angulos posticos leviter plicato. 
Long. 10 millim. 9? 
Hab. Panama, Bugaba (Champion). 
sane ( 2P 2 
