292 SUPPLEMENT. 
Allied to S. varians, but the prothorax is more quadrate, and not distinctly nicked 
before the hind angles. It is also abundantly distinct by the colour of the body beneath 
and of the legs, the absence of any vitte: on the thorax, &c. Only three specimens 
have yet come under my notice, and they are so like Plateros rubricatus as probably to 
have been overlooked for it. 
2 (s.) Silis diversa. 
Testaceo-flava ; occipite, antennis (articulis tribus apicalibus exceptis), tibiis, tarsis, elytrorum dimidio apicali 
abdomineque nigris ; mandibularum apicibus palpisque picescentibus. Long. 9 millim. 9. 
Hab. Panama, Bugaba (Champion). 
This species has a very great resemblance, and is, no doubt, very nearly allied to 
S. serrigera; but it is even more developed than the large females of that species from 
the State of Panama, and is wider behind, with the femora and knees yellow. The 
thorax is also entirely yellow, and does not possess any notch at the hind angles; the 
margin is a little thickened near the middle. The antennz are widened in the middle, 
serrate and compressed as in S. varians, but with three joints at the apex yellow. The 
base of the head does not have a spot, but is indeterminately black between the eyes. 
The posterior part of the metasternum and the hind cox are partly black. 
Only two specimens occurred. 
2, (c). Silis serrigera. (9. varians, var. Tab. VI. fig. 1.) 
S. varianti proxime affinis, flavo-ferruginea ; antennis (articulis duobus apicalibus exceptis), occipite, macula 
basali capitis, thoracis linea mediana integra, scutello, sutura ad basin tenuiter, corpore subtus pedibusque 
nigris ; prothorace oblongo, antice subangustato, margine basali truncato, angulis posticis minute excisis. 
Long. 8-9 millim. ¢ 9. 
Hab. GuateMALA, Chacoj, Panima (Champion, 3); Panama, Bugaba, Caldera in 
Chiriqui (Champion). 
Var. Elytris triente apicali nigris. ¢ 2. 
Mas. Unguiculis anticis externis, basi dente angulari laminata; segmento ventrali sexto fisso; antennarum 
articulis secundo ad decimum lineola nitida impressa. 
Hab. Panama, Volcan de Chiriqui 2000 to 6000 feet, Bugaba (Champion). 
The characters which separate this species from S. varians are the longer antenne with 
more acute serration of the intermediate joints, and with two joints at the apex yellow, 
this being most conspicuous in large females (I have seen examples in which the ninth 
joint is also partly testaceous); the longer thorax with a similar, but less deep, notch at 
the hind angle in both sexes, and the longer elytra, which are not so costate, the 
nervures only being faintly raised. The males are rarer than the females among the 
rather large series of specimens collected by Mr. Champion; but I have found three or four 
of the variety with black tips to the elytra, and there are two males, one from Panima 
and one from Caldera, of the type form, only that the latter differs in having the legs 
