LITOLIBRUS. 261 
even should the specimens I assign to Z. varians prove to belong to more than one 
species, as is very possible; usually they are black, with a well-marked large red spot 
on each near the suture and in front of the middle, and the margin at the apex pale 
yellow, this colour extending forwards along the sides as far as the thorax: sometimes 
the red spot is not present, and occasionally it is very obscure ; on the other hand, it 
is occasionally larger, so that the elytra are almost entirely red. Sometimes the disc 
of the thorax is infuscate. 
The series before me, though from so many localities, is not extensive, and I am 
therefore unable to decide whether there may not be more than one variable species 
included in it, as the examples are mostly in bad condition. 
We have received three examples from the State of Panama and about two dozen 
from Guatemala. 
7. Litolibrus posticatus, sp. n. 
Subhemispheericus, testaceus, capite utrinque prothoraceque in medio fuscescentibus ; elytris rufis, pone medium 
angulariter nigro-fasciatis, apice summo testaceo. 
Long. 22 millim. 
Hab. Guatemata, Teleman, Mirandilla (Champion); Panama, Bugaba, Volcan de 
Chiriqui (Champion). 
This is no doubt a distinct species from Z. varians, though not very different in 
colour from some varieties thereof; and if, as I expect will prove to be the case, 
L. posticatus is also variable in colour, varieties of the two may probably be found 
agreeing in this respect. LL. posticatus is, however, rather larger and more convex, 
with a decidedly longer thorax and a larger club to the antenne. In one example the 
black fascia extends completely across the elytra; in another it takes the form of a 
broad black cincture, leaving a large red discoidal space common to the two wing- 
cases: and ina third it is reduced in extent and less definite in outline. As I have 
seen only four examples it is impossible for me to say with certainty, in view of 
these discrepancies, whether all represent one species. 
8. Litolibrus fulgens, sp. n. 
Subhemisphericus, testaceus, supra rufus ; elytris stria suturali distincta aciculisque transversis subtilis, striis 
ceteris obsoletissimis. 
Long. 24 millim. 
Hab. Guatumana, San Gerdnimo (Champion). 
This insect differs from L. rufipennis and L. posticatus in the elytra being marked 
behind with distinct transverse scratches; the head and thorax are immaculate, and 
the club of the antenna large. I have only two examples before me: the type has no 
trace of serial punctures on the wing-cases, and the strie that replace them can 
scarcely be distinguished ; the other example has obscure series of punctures behind, 
