94 MALACODERMATA. 
6. Silis erythroderes. 
Atra, nitidula; capite et prothorace sanguineis, antennis ut in precedente, elytris subtilissime coriaceis, fere 
alutaceis, scutello nigro punctato. Long. 7 millim. 9? 
Femina? prothoracis lateribus medio late constrictis, ante angulos posticos sinuatis. 
Hab. Mexico, Jalapa (Hége). 
Distinguished from S. hwmatodes by the characters given above. There being only at 
present two specimens, probably females, it will be better not to give a more detailed 
description till more specimens have been seen. 
7. Silis eroides. (Tab. VI. fig. 6.) 
Nigro-fumosa, opaca; antennis compressis, serratis, prothorace suborbiculato, lateribus flavis, plicato-incisis ; 
elytris postice modice explanatis, subtiliter rugosis, lineis tribus obsolete elevatioribus, plaga lata humerali 
ochracea pone medium producta. Long. 6-7 millim. ¢ 2. 
Mas prothorace fere orbiculato, lateribus medio plicato interruptis ; oculis magis prominentibus. 
Femina prothorace magis oblongo, lateribus sinuatis, angulis posticis minute acutis. 
Hab. Mexico, Cordova (Sallé); Guatemata, San Juan, San Isidro, El Zumbador, 
Las Mercedes (Champion). - 
A specimen from Las Mercedes is shown in the Plate. The pattern so very often 
repeated, and the somewhat lyciform shape, occur again in the present species. There 
are species of the genera Lycostomus, Calopteron, Plateros, Drilolampadius, Calocladon, 
Ichnea, and of other families of Coleoptera, all in a general way, and some very closely, 
alike. This insect is known by the shape of the thorax, which has a rather large and 
open notch a little below the middle. The head and thorax are both rather roughly 
punctured and rugose; the eyes are prominent and globular, reminding one of the head 
of a Calocladon ; the elytra are firmer than usual, gradually and neatly widened. 
8. Silis basalis. 
Flava, subnitida; antennis (articulo basali excepto), palpis, femorum apicibus, tibiis tarsisque fuscis ; elytris 
nigris, basi rufis. Long. 53-64 millim. ¢ 9. . 
Mas prothorace subquadrato, lateribus infra medium minute excisis. 
Hab. Guatemata, Purula, Quiche Mountains (Champion). 
This little species agrees sufficiently with S. hwmatodes to be compared with it; the 
thorax, however, is more transversely quadrate, and in the male is nicked much in the 
manner of a Discodon. The female, however, has the minute excision immediately 
before the hind angles, and these themselves, acute, as in other species of this group of 
Silis. The eyes are small; the antenne nearly of the length of the body and filiform. 
The amount of red at the base of the elytra varies from a mere spot to one third; it is 
never very clearly defined. The specimens from the Quiche Mountains have darker 
legs than those from Purula. In these latter the underside is wholly red, except the 
abdomen, which is indistinctly infuscate. The legs are red, with the exception of the 
tips of the tibiz and the middle of the tarsi. 
